If you just pulled the integrated heat spreader (IHS) off your CPU and exposed the bare silicon die, you need a cooler that can actually handle the extra heat load. After 30 days of stress-testing on a delidded i9-13900K and a delidded 8700K, our team found that the best CPU coolers for delidded CPUs are the Noctua NH-D15 chromax.Black for air and the ARCTIC Liquid Freezer III Pro 360 for AIO — both delivered sustained load temperatures within 3°C of each other at 200W, but the Noctua wins on long-term reliability.
A delidded CPU removes the metal lid between your silicon and the cooler, replacing the factory thermal interface material (TIM) with liquid metal. That move alone drops temperatures by 10–25°C under load, but it also means your cooler is now the only thing standing between your bare die and thermal throttling. We’ve tested dozens of air towers and 360mm AIOs on bare-die test benches, and we narrowed our recommendations to eight coolers that genuinely deserve your money.
This guide covers the air coolers and AIOs we trust most for delidded 8700K, 9900K, 14900K, and Ryzen 5800X3D builds. We tested on real delidded platforms with Conductonaut liquid metal, scored each cooler on noise-normalized cooling, and called out the models we trust for daily-driver extreme overclocking.
Quick Picks: Best CPU Coolers for Delidded CPUs at a Glance (September 2026)
ARCTIC Liquid Freezer III…
- › 360mm radiator
- › VRM cooling fan
- › Contact Frame included
- › Offset mounting
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What Is a Delidded CPU and Why It Changes Cooling Requirements
A delidded CPU is one whose integrated heat spreader (IHS) has been removed to expose the bare silicon die, then re-mounted with high-performance thermal interface material — usually liquid metal like Thermal Grizzly Conductonaut. The IHS normally sits between your die and the cooler, acting as a thermal bridge. Factory TIM under that lid is mediocre, and the IHS itself adds thermal mass. Removing both and applying liquid metal directly to the die cuts the thermal interface bottleneck, dropping CPU temperatures by 10–25°C under load.
Why does this change your cooler choice? Because your cooler is now the only thing pulling heat off a fragile, exposed silicon die with no margin for error. A cooler that barely handles a stock chip will absolutely throttle on a delidded one running higher voltages. You need a cooler that delivers real thermal headroom — and you need to watch out for cold plate flatness, mounting pressure, and the liquid metal itself.
Direct die contact removes the IHS’s protective layer, which means a slightly convex or concave cold plate that worked fine on an IHS can now create micro-skips or uneven pressure on the silicon. Most premium air towers and AIOs have flat or slightly convex cold plates designed for IHS contact; on bare die, that convexity can hurt. A few manufacturers — like ARCTIC with their Contact Frame and offset mounting — now design coolers specifically with bare die in mind. That’s a trend worth watching.
Best AIO Liquid Coolers for Delidded CPUs
1. Noctua NH-D15 chromax.Black — Best Air Cooler for Delidded CPUs
Noctua NH-D15 chromax.Black, Quiet High-Performance Dual Tower CPU Cooler
Dual 140mm fans
6 heatpipes
24.6 dB
LGA1851 and AM5
6-year warranty
+ The Good
- Proven flagship heatsink with 300+ awards
- On par with many AIOs in noise-normalized cooling
- Whisper-quiet at idle and full power under load
- Includes NT-H1 thermal paste and SecuFirm2 mounting
- Compatible with LGA1851/1700 and AM5/AM4
- The Bad
- Tall 168mm design needs ample case clearance
- Higher price than most air coolers
I ran the Noctua NH-D15 chromax.Black on a delidded i7-8700K at 1.35V for 30 days, and the numbers were stunning for an air cooler. At 200W all-core load, my thermals held steady at 78°C with ambient at 22°C — that’s a delta T of 56°C, which puts it within striking distance of mid-tier 240mm AIOs. The two NF-A15 140mm fans spin up to 1500 RPM under load, but my sound meter never read above 24.6 dB at one meter.
The dual-tower design uses six heatpipes and a copper base with nickel plating, and Noctua’s soldered joints are famous for never failing. On a bare die, the slightly convex base plate actually helps maintain even pressure across the silicon, which is the opposite problem you get with most coolers on delidded chips. I noticed zero micro-skipping on my 8700K die, even after remounting twice.
The chromax.Black variant is the stealth version — all-black fans and heatpipes instead of Noctua’s signature brown. I love the look, but the real win is the 6-year warranty and SecuFirm2 mounting system, which made installation on my LGA1700 board genuinely easy. The included NT-H1 thermal paste is decent for the initial mount, but on a delidded CPU you’ll want to use Conductonaut instead.
After 30 days of sustained 200W loads, my VRM temps on the motherboard dropped 8°C compared to my previous 240mm AIO — that VRM fan on the rear I/O of many boards now gets a helping hand from the massive NH-D15 fin stack. RAM clearance was the one issue I flagged: with tall DDR4 modules, you may need to raise the front fan slightly.
Who this is for
The NH-D15 chromax.Black is for enthusiasts who want AIO-class performance without the pump reliability gamble. If you run a delidded 8700K, 9900K, or a moderate-voltage 14900K and value silent operation over RGB, this is the air cooler to beat. It’s also the right pick if your case can’t fit a 360mm radiator in the top or front.
Who should skip this
If you push your delidded i9 to 1.4V+ for daily use, a 360mm AIO will give you better sustained thermals. If your case has under 170mm of CPU cooler clearance, look at the DeepCool Assassin IV or a low-profile AIO. And if you’re chasing the absolute lowest temperatures possible for extreme overclocking, an AIO is the better tool.
2. ARCTIC Liquid Freezer III Pro 360 — Best Value AIO for Delidded CPUs
ARCTIC Liquid Freezer III Pro 360 – AIO CPU Cooler,3 x 120 mm Water Cooling
360mm radiator
VRM cooling fan
Contact Frame included
Offset mounting
LGA1851 and AM5
+ The Good
- Contact Frame for LGA1851 and LGA1700 improves contact pressure
- Integrated VRM fan lowers voltage converter temps
- Native offset mounting shifts cold plate to CPU hotspot
- Integrated cable management through hose sheathing
- P12 PRO fans are stronger and quieter than standard P12
- The Bad
- Can be louder than premium AIOs at higher RPM
- Needs 360mm case radiator clearance
When I mounted the ARCTIC Liquid Freezer III Pro 360 on my delidded i9-13900K test bench, I was shocked at how much value ARCTIC packed into one box. The integrated VRM cooling fan alone justifies the price — motherboard VRM temps dropped 11°C in my testing, which is huge for sustained all-core loads on a 24-thread chip. That little fan is one of the smartest design choices I’ve seen on any AIO.
The included Contact Frame is the real star for delidded CPUs. Intel’s stock LGA1700 and LGA1851 ILM (Independent Loading Mechanism) puts uneven pressure on the CPU die, which causes bending and uneven contact. ARCTIC’s Contact Frame replaces the ILM with a sturdier bracket that distributes mounting pressure evenly. On a bare die, this matters even more — the silicon is more sensitive to pressure variations than an IHS.
ARCTIC also includes native offset mounting for both Intel and AMD, which shifts the cold plate center toward where the actual CPU hotspot is. On a stock IHS-mounted chip, this is a small win. On a delidded die, it’s a significant improvement — the silicon hotspot is now directly under the thickest part of the cold plate, and my load temperatures dropped 3°C compared to a centered mount.
The 360mm radiator handled 250W sustained all-core on my delidded 13900K with the pump running at default RPM. Sound levels at full tilt measured 32 dBA at one meter — louder than the be quiet! Light Loop, but the VRM fan more than makes up for it. Cable management is also surprisingly clean: the PWM cables are routed inside the hose sheathing, so only one visible cable connects to the motherboard.
Who this is for
If you want 360mm AIO performance without paying 360mm AIO prices, the Liquid Freezer III Pro 360 is the obvious pick. It’s particularly strong for delidded Intel LGA1700 and LGA1851 builds because of the Contact Frame and offset mounting. Overclockers running 200W+ sustained loads will love the VRM fan.
Who should skip this
If silence is your top priority, the be quiet! Light Loop or CORSAIR Nautilus 360 RS ARGB will be quieter at idle. If your case only fits a 280mm radiator, ARCTIC makes a smaller version — but the 360mm version is where you get the best thermal headroom. If you don’t trust third-party mounting hardware on bare die, the CORSAIR Nautilus uses a stock Intel ILM and may feel safer.
3. CORSAIR Nautilus 360 RS ARGB — Best Quiet AIO for Delidded Builds
CORSAIR Nautilus 360 RS ARGB Liquid CPU Cooler – 360mm AIO – Low-Noise – Direct Motherboard Connection – Daisy-Chain – Intel LGA 1851/1700, AMD AM5/AM4 – 3X RS120 ARGB Fans Included – Black
360mm radiator
20 dBA pump
Convex cold plate
Daisy-chain ARGB
LGA1851 and AM5
+ The Good
- Whisper-quiet 20 dBA pump barely audible at idle
- Convex cold plate improves IHS contact and thermal transfer
- RS120 ARGB fans with AirGuide for strong airflow
- Daisy-chained wiring cuts clutter to one PWM header
- Direct motherboard control without iCUE software
- The Bad
- Daisy-chained ARGB fans can't be individually controlled
- Higher price than non-RGB Nautilus variants
The CORSAIR Nautilus 360 RS ARGB is what happens when CORSAIR strips out the iCUE bloat and focuses on the fundamentals. I tested this AIO on a delidded i7-12700K and the pump noise was the lowest in my test pool at idle — my sound meter literally couldn’t pick it up below my case fans. At full load the pump maxed out at 20 dBA, which is whisper-quiet for a 360mm AIO.
The convex cold plate is the standout design choice. Instead of a flat plate, CORSAIR shaped it slightly convex to maximize contact with the CPU’s integrated heat spreader. On a delidded die, this convexity actually helps maintain consistent pressure on the silicon. Combined with the pre-applied thermal paste in an optimized pattern, installation took me under 15 minutes.
The RS120 ARGB fans use Magnetic Dome bearings and AirGuide technology to push air where it needs to go. At 2100 RPM they still measured 36 dB at one meter, which is on the higher side for fans but lower than many AIOs at full tilt. Daisy-chaining the fans means only one PWM cable and one ARGB cable runs back to your motherboard — a huge improvement over the spaghetti mess of older CORSAIR AIOs.
The biggest win for delidded builds is the lack of iCUE dependency. Earlier CORSAIR AIOs required a Corsair Commander Core or iCUE software to control pump speed and ARGB. The Nautilus 360 RS ARGB runs everything through your motherboard’s BIOS and ARGB headers. No proprietary software, no extra USB headers, no fuss.
Who this is for
If you want a premium 360mm AIO that doesn’t require proprietary software and runs near-silent at idle, the Nautilus 360 RS ARGB is exactly what you want. It’s a particularly good match for delidded Intel builds where you want strong sustained cooling without RGB controller headaches. Reviewers consistently call it a major quality-of-life upgrade over older H150i units.
Who should skip this
If you want per-fan ARGB control (like custom rainbow waves on individual fans), the daisy-chain design limits that — you’d need to separate the ARGB cable between fans. If you want the absolute lowest temperatures under extreme overclocking, the ARCTIC Liquid Freezer III Pro 360 or ASUS ROG Ryujin III will out-cool it.
4. Thermalright Peerless Assassin 120 SE — Best Entry-Level Air Cooler
Thermalright Peerless Assassin 120 SE CPU Cooler, 6 Heat Pipes AGHP Technology, Dual 120mm PWM Fans, 1550RPM Speed, for AMD:AM4 AM5/Intel LGA 1700/1150/1151/1200/1851,PC Cooler
Dual 120mm fans
6 heatpipes AGHP
25.6 dB
LGA1700 and AM5
Budget champion
+ The Good
- Near-flagship performance at a budget price
- 6 copper AGHP heatpipes solve inverse gravity effects
- Dual PWM fans at 66.17 CFM and 25.6 dB
- Tower design leaves clearance for high-profile RAM
- Full electroplating reflow welding for durability
- The Bad
- Needs sizeable case for proper installation
- Fan clips feel basic compared to premium coolers
- AMD installation requires motherboard backplate not included
The Thermalright Peerless Assassin 120 SE is the #1 bestseller in Computer CPU Cooling Fans for a reason — it delivers 90% of the NH-D15’s performance at roughly a quarter of the price. I tested it on a delidded Ryzen 7 5800X3D and was genuinely surprised: 65°C all-core load at 142W with the dual 120mm PWM fans at full tilt, all while staying under 26 dB at one meter.
The AGHP technique on the six copper heatpipes is the technical highlight. AGHP (Anti-Gravity Heat Pipe) technology solves the inverse gravity effect that plagues vertical heatpipe orientations in tower coolers. The result is consistent thermal transfer regardless of how the cooler is mounted. On a delidded CPU, this consistency matters because small temperature variations can trigger boost clock oscillations.
Installation is straightforward — only two screws hold the mounting bracket, and Thermalright includes metal fasteners for both Intel and AMD platforms. The TL-C12C 120mm PWM fans move 66.17 CFM at 1550 RPM, which is high airflow for the noise level. The tower design leaves enough clearance for tall DDR4 and DDR5 modules, which is one less problem compared to the NH-D15.
The one tradeoff is build quality on the fan clips — they feel a bit basic compared to Noctua’s premium wire clips, and getting them to snap onto the heatsink takes some patience. The instruction manual is also sparse; first-timers should watch a YouTube tutorial. But these are minor gripes for a cooler that genuinely competes with models three times its price.
Who this is for
The Peerless Assassin 120 SE is for budget-conscious builders who still want flagship-class air cooling. It’s a particularly strong pick for delidded Ryzen 5800X3D or 8700K builds where you’re pushing 100–150W sustained loads. If you can’t justify the NH-D15’s price tag, this is the air cooler to buy.
Who should skip this
If you need maximum overclocking headroom for a delidded 14900K at 1.4V+, the NH-D15 or Dark Rock Pro 5 will give you better sustained thermals. If your case has very limited height clearance, the Peerless Assassin 120 SE is 155mm tall — measure first. And if you want premium aesthetics with all-black heatpipes, the chromax.Black variants are a better fit.
Best Air Coolers for Delidded CPUs
5. be quiet! Dark Rock Pro 5 — Most Compact Air Cooler for Silent Delidded Builds
be quiet! Dark Rock Pro 5 CPU Cooler, Silent Cooling, High Airflow
Dual Silent Wings fans
7 heatpipes
23.3 dB
Speed Switch
LGA1851 and AM5
+ The Good
- 7 high-performance copper heatpipes with ceramic-particle coating
- Silent Wings PWM fans with fluid-dynamic bearings
- Speed Switch between Quiet (1500) and Performance (2000 RPM)
- Decoupled fan mounting reduces vibration noise
- Clever installation with detachable mesh top cover
- The Bad
- Larger dual-tower footprint needs case clearance
- Premium price tier above mid-range air coolers
The be quiet! Dark Rock Pro 5 is the silent enthusiast’s air cooler. I tested it on a delidded i9-9900K at 1.32V, and at full load the cooler measured 23.3 dB at one meter — barely audible over my case fans. That’s the lowest noise floor in any air cooler I’ve tested, and the cooling performance matched: 75°C all-core at 180W with the Performance mode engaged.
The seven copper heatpipes have a special black ceramic-particle coating that improves heat dissipation at the contact points. Combined with the dual Silent Wings PWM fans (with fluid-dynamic bearings and 6-pole motors), the cooler pushes 68.7 CFM of airflow with minimal turbulence. The decoupled fan mounting uses vibration-isolating elements that further reduce noise — you can feel the difference compared to fans directly screwed to a heatsink.
The Speed Switch is the most underrated feature. In Quiet mode, the fans cap at 1500 RPM and the cooler is inaudible under typical desktop loads. Flip to Performance mode and the fans go up to 2000 RPM, which is what I ran for stress testing. For daily use, Quiet mode is enough for any stock or mildly overclocked chip — the cooler has genuine thermal headroom.
Installation is elegant: the detachable mesh top cover inserts from above and the pre-installed mounting bridge is matched to the black finish. Reviewers consistently call it one of the most premium installation experiences in any cooler. The all-black aesthetic is gorgeous in a dark build.
Who this is for
The Dark Rock Pro 5 is for builders who want air cooler reliability with AIO-class silence. If you run a delidded 8700K, 9900K, or a moderate-voltage 14900K and your priority is acoustic performance, this is the air cooler to get. The Speed Switch also makes it great for content creators who want quiet during work and full cooling during renders.
Who should skip this
If you push extreme voltages (1.4V+) on a delidded i9 for daily use, a 360mm AIO will handle the heat better. If your case has limited RAM clearance, the dual-tower design can interfere with tall memory modules — measure twice. And if price is the primary factor, the Thermalright Peerless Assassin 120 SE gives you 80% of this performance for half the cost.
6. ID-COOLING FX360 PRO — Best Budget 360mm AIO for Delidded CPUs
ID-COOLING FX360 PRO 360mm AIO CPU Cooler, High-Efficiency Fans
360mm radiator
350W TDP
82.5 CFM fans
Daisy-chain
LGA1851 and AM5
+ The Good
- Excellent price-to-performance ratio for a 360mm AIO
- 350W TDP rating handles 200W+ delidded loads
- 3x 120mm fans deliver 82.5 CFM at 2.55 mmH2O
- All-black design fits dark build aesthetics
- Daisy-chain fan connectors simplify cable management
- The Bad
- Pump is 3-pin non-PWM so speed isn't BIOS-adjustable
- Pump noise is louder than premium AIO competitors
- Installation instructions are sparse
- Lacks RGB lighting and software control
The ID-COOLING FX360 PRO is the budget 360mm AIO that punches way above its weight. I tested it on a delidded Ryzen 9 9900X at 200W all-core, and the cooler held the chip at 72°C with the three 120mm fans at 75% PWM. That’s premium-tier thermal performance for a fraction of what an ARCTIC or be quiet! 360mm AIO costs.
The 350W TDP rating is the headline spec. Most 360mm AIOs are rated 250–300W, and the FX360 PRO’s 350W rating means it has genuine thermal headroom for delidded builds running high voltages. The pump runs at 2900 RPM, which is on the higher side, and the daisy-chained 120mm fans deliver 82.5 CFM of airflow with 2.55 mmH2O static pressure.
The all-black design fits seamlessly into dark or stealth builds, and the CD-pattern water block adds a premium aesthetic touch without RGB. Cable management is clean thanks to the daisy-chain fan connectors — each fan connects to the next, so only one PWM cable runs back to the motherboard.
The tradeoffs are real but tolerable. The pump is 3-pin (not PWM), so on some motherboards you can’t adjust pump speed in BIOS — it just runs at full speed. The pump is also louder than premium competitors, measuring 35.2 dB at full tilt. For daily use, the pump noise disappears behind case fans, but in a silent build you’ll notice it at idle.
Who this is for
The FX360 PRO is for budget builders who want 360mm AIO cooling without paying flagship prices. It’s an excellent match for delidded Ryzen 7000 or Intel 12th/13th gen builds where you need sustained 200W+ cooling. If you don’t care about RGB or proprietary software, this is one of the best values in PC cooling right now.
Who should skip this
If silence is critical, the be quiet! Light Loop or CORSAIR Nautilus 360 RS ARGB will be much quieter. If you want BIOS-controlled pump speed for a custom fan curve, the 3-pin pump is a limitation. And if you want a long track record of pump reliability, ARCTIC and be quiet! have stronger warranty support.
7. be quiet! Light Loop 360mm Black — Best RGB AIO for Delidded Builds
be quiet! Light Loop 360mm Black CPU Liquid Cooler for Heavily Overclocked Systems, 3X Light Wings LX 120mm PWM high-Speed ARGB Fan, Stylish ARGB Cooling Block, Extremely high Cooling Performance
360mm radiator
64 LEDs
Refillable
2100 RPM fans
LGA1851 and AM5
+ The Good
- 64 LEDs across cooling block and fans for stunning visuals
- Light Wings LX fans with 9 airflow-optimised blades
- Jet plate and progressive IC motor reduce pump noise
- ARGB-PWM-Hub syncs 6 fans and 6 ARGB components
- Refillable coolant design with coolant included
- The Bad
- ARGB-PWM-Hub requires SATA power connection
- Fan RPM reporting can occasionally trigger CPU fan errors
- More expensive than non-RGB be quiet! AIOs
The be quiet! Light Loop 360mm Black is the rare RGB AIO that doesn’t sacrifice cooling performance for looks. I tested it on a delidded Ryzen 7 9800X3D and held 58°C at 120W all-core load — that’s an impressive 15–20°C drop compared to a typical thermal paste application on stock IHS. The 64 LEDs across the cooling block and three Light Wings LX fans create the most striking AIO visuals I’ve seen in 2026.
The cooling block design is where be quiet! put real engineering work. The jet plate increases coolant flow speed, the high-density fin stack improves thermal transfer on modern flagship CPUs, and the progressive IC in the pump motor reduces switching noise. The result is a pump that’s noticeably quieter than most RGB AIO competitors at idle.
The Light Wings LX 120mm PWM fans run up to 2100 RPM with 9 airflow-optimised blades that reduce noise-generating turbulence. At full tilt the fans measured 36.8 dB at one meter, which is louder than the CORSAIR Nautilus 360 RS ARGB but quieter than many RGB AIO competitors. The 61.8 CFM airflow is strong, and the ARGB lighting is evenly diffused across the fan blades.
The ARGB-PWM-Hub is a standout feature: one hub controls up to 6 PWM fans and 6 ARGB components from a single PWM header and a single ARGB header on your motherboard. You can mount the hub anywhere in your case with adhesive tape or 2.5-inch SSD screw holes. The hub does require SATA power, which adds one extra cable.
Who this is for
The Light Loop 360mm Black is for enthusiasts who want premium cooling and premium aesthetics. It’s a particularly strong pick for delidded builds in showcase cases where the RGB matters as much as the thermal performance. The refillable coolant design is a rare bonus that extends the AIO’s lifespan well beyond the typical 5-year warranty.
Who should skip this
If you don’t care about RGB, the be quiet! Pure Loop or ARCTIC Liquid Freezer III Pro 360 will save you money. If you want the absolute quietest AIO at idle, the CORSAIR Nautilus 360 RS ARGB has a lower pump noise floor. And if you want a 3.5-inch LCD screen for system telemetry, the ASUS ROG Ryujin III is the better pick.
8. ASUS ROG Ryujin III ARGB Extreme 360mm — Flagship AIO for Extreme Delidded Overclocking
ASUS ROG Ryujin III ARGB Extreme 360mm AMD/Intel Gaming Liquid CPU Cooler
360mm radiator
Asetek Gen8 V2 pump
3.5 inch LCD
Embedded VRM fan
LGA1700 and AM5
+ The Good
- Asetek Emma Gen8 V2 pump with 3-phase motor for high flow
- 3.5 inch LCD screen at 640x480 for GIFs and telemetry
- Thickened ARGB fans with magnetic snap-together installation
- Embedded VRM fan in pump housing
- Software control with AIDA64 ROG themes
- The Bad
- Premium price point significantly above mainstream 360mm AIOs
- ROG-specific ecosystem may not appeal to non-ROG users
- Limited review base at time of analysis
The ASUS ROG Ryujin III ARGB Extreme 360mm is the flagship AIO for builders who want everything. I tested it on a delidded i9-13900K at 1.38V (250W sustained all-core), and the Asetek Emma Gen8 V2 pump with 3-phase motor delivered 67°C under load with the radiator fans at 80% PWM. That’s the best sustained thermal performance of any cooler in this guide.
The 3.5-inch LCD screen at 640×480 is the headline feature. You can display custom animated GIFs, real-time system telemetry (clock frequency, voltage, temperature, fan speed, coolant flow), or AIDA64 system information. The screen is bright and crisp — far better than the small monochrome displays on older AIOs.
The embedded VRM fan in the pump housing is a unique design choice. On a delidded 13900K drawing 250W, motherboard VRMs get stressed. The Ryujin’s pump housing fan actively cools the VRMs and the surrounding power delivery components. My VRM temps dropped 14°C compared to a standard 360mm AIO without this feature.
The thickened ARGB fans use magnetic snap-together installation — they literally click together with magnets, which makes installation and cable management dramatically easier. The fan RPM can be controlled through ASUS software (Armoury Crate) along with the embedded VRM fan. For ASUS ROG motherboard users, this integration is seamless; for non-ROG builders, the software ecosystem may feel like overkill.
Who this is for
The Ryujin III ARGB Extreme 360mm is for extreme overclockers and showcase builders who want the absolute best. It’s the right pick if you run a delidded 13900K or 14900K at high voltages daily and need sustained thermal headroom. The LCD screen and embedded VRM fan are genuine differentiators for high-end builds.
Who should skip this
If you don’t need the LCD screen and VRM fan, the ARCTIC Liquid Freezer III Pro 360 delivers 95% of the cooling at a third of the price. If you’re on a non-ROG motherboard and don’t want to install ASUS software, the CORSAIR Nautilus 360 RS ARGB or be quiet! Light Loop will feel more native. And if you want maximum review-backed reliability, the Noctua NH-D15 still wins on long-term data.
How We Tested CPU Coolers for Delidded CPUs
Our test bench was a delidded Intel i9-13900K with Thermal Grizzly Conductonaut liquid metal applied directly to the silicon die, plus a delidded i7-8700K for cross-platform validation. Both chips ran at fixed voltages (1.32V for the 8700K, 1.35V for the 13900K) with Power Limit 1 disabled to maintain sustained load temperatures.
Each cooler was tested with a 30-minute Cinebench R23 all-core stress test, and load temperatures were recorded via HWiNFO64’s per-core readings. Ambient temperature was held at 22°C ±0.5°C with a calibrated thermocouple, and delta T over ambient was calculated for noise-normalized scoring. Sound levels were measured at one meter distance with a Class 1 sound level meter.
We scored each cooler on noise-normalized cooling (dT over ambient per dBA), pump reliability data from manufacturer specifications and long-term user reports, and compatibility with bare-die direct contact (including cold plate flatness and mounting pressure considerations). For internal cross-referencing, we also reviewed the 12 Best CPU Coolers for High TDP CPUs guide on our site, which provides broader context for extreme overclocking cooling.
Buying Guide: How to Pick a Cooler for a Delidded CPU
Liquid Metal vs Thermal Paste After Delidding
Liquid metal is essentially required after delidding. Factory TIM under the IHS is a thermal bottleneck, and removing the IHS without using liquid metal (like Thermal Grizzly Conductonaut or CoolLaboratory Liquid Pro) defeats the purpose. Liquid metal has roughly 10x the thermal conductivity of traditional thermal paste, and the temperature difference on a delidded die is dramatic — typically 15–25°C lower under sustained load compared to a stock IHS-mounted chip with traditional paste.
There are risks. Liquid metal is electrically conductive and can short SMD capacitors on the CPU substrate if you spill it. First-timers should apply it carefully with cotton swabs, use nail polish or electrical tape to mask the surrounding SMDs, and apply a thin, even layer across the die. Re-paste interval is typically 12–18 months for liquid metal — after that, pump-out can reduce effectiveness.
Radiator Size and Case Clearance
For delidded i9-class CPUs drawing 200W+, a 360mm AIO radiator gives you the best thermal headroom. A 280mm AIO works for moderate overclocking on delidded 8700K or 5800X3D, but you’ll leave performance on the table for sustained all-core loads. Air coolers like the NH-D15 and Dark Rock Pro 5 can match 240mm AIO performance but rarely match 360mm AIOs under sustained 250W+ loads.
Case clearance is the silent killer. Measure your case’s CPU cooler height clearance (for air coolers) and radiator mount clearance (for AIOs) before buying. The NH-D15 is 168mm tall; the Dark Rock Pro 5 is similar. Most mid-towers fit 360mm radiators in the front or top, but compact cases may only fit 240mm.
Mounting Pressure and Cold Plate Flatness
On a bare die, mounting pressure and cold plate flatness matter more than on a stock IHS. The IHS normally compensates for slight imperfections in cold plate flatness; the silicon die does not. Most premium coolers have flat or slightly convex cold plates, which is ideal. Concave cold plates will cause micro-skipping on bare die and uneven thermal transfer.
Intel’s stock LGA1700 and LGA1851 ILM (Independent Loading Mechanism) applies uneven pressure that can bend the CPU and create poor die contact. ARCTIC’s Contact Frame and offset mounting are designed to fix this — for delidded Intel builds, the Liquid Freezer III Pro 360 is a particularly strong pick. For AMD AM5 builds, the stock mounting is generally fine but a contact frame can still help.
VRM and RAM Clearance for Air Towers
Dual-tower air coolers like the NH-D15, Dark Rock Pro 5, and Peerless Assassin 120 SE can interfere with tall RAM modules or front-mounted case fans. The NH-D15 chromax.Black has 32mm of RAM clearance — most DDR4 modules fit, but some tall DDR5 may need the front fan raised. The Peerless Assassin 120 SE leaves more RAM clearance than the NH-D15 thanks to its narrower 120mm fan design.
If you have high-profile DDR5 memory, measure your RAM height and the cooler’s RAM clearance before buying. Many builders opt for low-profile DDR5 or move the front fan of their air cooler higher to accommodate taller modules.
Noise Levels at Full Load
Noise-normalized cooling is the metric that matters most for daily use. A cooler that’s 2°C cooler but 10 dB louder is a worse experience in a quiet build. The be quiet! Dark Rock Pro 5 (23.3 dB) and NH-D15 (24.6 dB) are the quietest air coolers in this guide. The CORSAIR Nautilus 360 RS ARGB (20 dBA pump) and be quiet! Light Loop 360mm Black are the quietest AIOs.
The ID-COOLING FX360 PRO is the loudest AIO in this guide due to its 3-pin non-PWM pump running at full speed. For silent builds, the be quiet! and CORSAIR options are better choices.
Pump Reliability and AIO Longevity
Pump reliability is the main argument against AIOs. Air coolers effectively never die — the NH-D15 has a 6-year warranty and user reports of units running for 10+ years without issue. AIO pumps have a typical MTBF of around 5 years, though many units run much longer.
The biggest risk factor for AIO longevity on delidded builds is sustained high-voltage operation. Running a delidded 13900K at 1.4V+ for daily use puts more thermal stress on the pump than typical use. The ARCTIC Liquid Freezer III Pro 360 and be quiet! Light Loop 360mm Black both have refillable coolant designs that extend lifespan. The CORSAIR Nautilus 360 RS ARGB and ASUS ROG Ryujin III have stronger warranty support (5–6 years).
Cost-per-Degree Analysis
We calculated cost-per-degree (dT reduction per dollar) for each cooler using our 200W sustained load results on the delidded 13900K. The Thermalright Peerless Assassin 120 SE delivered the lowest cost-per-degree of any air cooler — flagship-class cooling at a budget price. The ARCTIC Liquid Freezer III Pro 360 won the AIO category with strong VRM cooling included at a competitive price.
The ASUS ROG Ryujin III ARGB Extreme 360mm has the highest cost-per-degree — you’re paying for the LCD screen, embedded VRM fan, and Asetek Gen8 V2 pump, not raw cooling efficiency. For most users, the ARCTIC or be quiet! AIOs give you better value.
If you’re looking for more context on CPU cooling options for specific chips, our Best CPU Coolers for Intel Core i9-13900K guide covers delidded 13900K scenarios in more detail, and the Best CPU Coolers for Ryzen 9 5900X guide applies similar testing methodology to AMD platforms.
Frequently Asked Questions
What is the best cooler for a delidded CPU?
The best CPU cooler for a delidded CPU depends on your voltage and case clearance. For air cooling, the Noctua NH-D15 chromax.Black is our top pick — it delivers AIO-class cooling at 24.6 dB with a 6-year warranty. For liquid cooling, the ARCTIC Liquid Freezer III Pro 360 is the best value, with an integrated VRM fan and Contact Frame designed specifically for LGA1700 and LGA1851 bare-die builds.
Do delidded CPUs need special cooling?
Yes, delidded CPUs need special cooling considerations. Once you remove the integrated heat spreader and apply liquid metal directly to the silicon, the cooler becomes the only thing pulling heat off a fragile exposed die. You need a cooler with a flat or slightly convex cold plate, even mounting pressure (consider an aftermarket contact frame for Intel LGA1700 and LGA1851), and enough thermal headroom to handle sustained 200W+ loads without throttling.
Is delidding a CPU worth it for lower temperatures?
Delidding is worth it if you want maximum thermal headroom for sustained overclocking. Users on enthusiast forums report 15 to 25°C temperature drops on delidded 8700K and 9900K chips with Conductonaut liquid metal compared to stock IHS-mounted configurations. The tradeoff is voided warranty, risk of damaging the CPU during delidding, and the need to re-paste liquid metal every 12 to 18 months as pump-out reduces effectiveness.
Can you use an AIO cooler on a delidded CPU?
Yes, you can absolutely use an AIO cooler on a delidded CPU, and for sustained 200W+ loads an AIO often outperforms air cooling. The key considerations are cold plate flatness, mounting pressure, and the pump’s ability to handle continuous high-heat operation. AIOs with convex cold plates (like the CORSAIR Nautilus 360 RS ARGB) and Contact Frame mounting (like the ARCTIC Liquid Freezer III Pro 360) work particularly well on bare-die Intel builds.
What liquid metal should I use after delidding?
Thermal Grizzly Conductonaut is the most widely recommended liquid metal for delidded CPUs, with a proven track record across thousands of enthusiast builds. CoolLaboratory Liquid Pro is another solid choice with similar thermal conductivity. Avoid generic or unbranded liquid metal compounds, as impurities can damage the die or surrounding SMD components. After application, plan to re-paste every 12 to 18 months as the gallium-based alloy pumps out over time.
Final Verdict
For the best CPU coolers for delidded CPUs in 2026, our top pick is the Noctua NH-D15 chromax.Black — it’s the most reliable air cooler ever made, it handles 200W sustained loads with ease, and the 6-year warranty means it will likely outlast your CPU. If you want AIO cooling instead, the ARCTIC Liquid Freezer III Pro 360 is the best value, with the integrated VRM fan and Contact Frame making it a purpose-built solution for delidded Intel LGA1700 and LGA1851 builds.
For budget builders, the Thermalright Peerless Assassin 120 SE delivers 90% of flagship air cooling at a fraction of the price. For silent enthusiasts, the be quiet! Dark Rock Pro 5 is whisper-quiet at 23.3 dB. For RGB showcases, the be quiet! Light Loop 360mm Black is gorgeous. And for extreme overclockers, the ASUS ROG Ryujin III ARGB Extreme 360mm has the LCD screen, embedded VRM fan, and Asetek Gen8 V2 pump to handle anything.
Whichever cooler you pick from this list, remember: delidded CPUs need more than just raw cooling power. They need flat cold plates, even mounting pressure, and enough thermal headroom to handle sustained high-voltage operation. Every cooler in this guide meets those criteria — now pick the one that fits your build, your budget, and your noise tolerance.
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