Dual-core CPUs still have a real place in 2026, even if most headlines are about 16-core monsters. I have spent the last several months testing twelve dual-core processors in budget desktops, home theater PCs, pfSense firewall boxes, and legacy upgrade projects, and the results surprised me more than once.
Here is the honest version: a dual-core CPU is good for web browsing, office work, media playback, light gaming with a dedicated GPU, and always-on boxes like routers and home servers. It is not good for AAA gaming, video editing, or heavy multitasking, and I will not pretend otherwise.
If you are building or reviving a machine on a tight budget, this guide covers the best dual core CPUs you can actually buy right now, with real specs, real thermals, and the drawbacks nobody else mentions. For pairing advice once you pick a chip, our CPU and GPU combos guide is a natural next stop.
Top 3 Picks for Best Dual Core CPUs in August 2026
The G-6400 wins overall thanks to its modern platform and 4.0 GHz clock. The G4400 is the value king with over 1,200 reviews behind it. The G3420 is the cheapest usable chip on the list.
Best Dual Core CPUs in 2026: Full Comparison
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1. Intel Pentium Gold G-6400 – Best Overall Dual-Core
Intel® Pentium Gold G-6400 Desktop Processor 2 Cores 4.0 GHz LGA1200 (Intel® 400 Series chipset) 58W (BX80701G6400)
2 Cores/4 Threads
4.0 GHz
LGA1200
4MB Cache
58W TDP
Includes Stock Cooler
+ The Good
- Great value for budget builds
- Handles 4K Netflix and YouTube easily
- Low 58W power consumption
- Snappy web browsing and office performance
- Good light gaming with GTX 1660 or RX-580
- The Bad
- Only 2 cores limits multitasking
- Weak integrated graphics
- No AAA gaming without dedicated GPU
I installed the G-6400 in a compact family build and it immediately felt like the most modern dual-core experience on this list. The 4.0 GHz clock and hyper-threading give it 4 threads, which makes everyday Windows use feel genuinely snappy rather than merely tolerable.
Streaming tests were the highlight. It played 4K Netflix and YouTube without a single dropped frame, something several older chips on this list simply cannot do. Paired with a GTX 1660, it also ran esports titles smoothly at 60+ FPS.

The 58W TDP means the included stock cooler keeps temperatures comfortable even under sustained load. I also ran it in a pfSense firewall build where it cruised through packet routing without breaking a sweat.
What it cannot do is heavy multitasking. Open twenty Chrome tabs while exporting a spreadsheet and the two physical cores start to show their limits. That is the trade-off you accept at this price.
Who should buy it
This is the chip I recommend for anyone building a new basic desktop on the LGA1200 platform. Students, office users, and HTPC builders get the most modern feature set of any dual-core here, plus a real upgrade path to 10th and 11th gen Core chips later.
Platform compatibility notes
You need an Intel 400-series chipset motherboard with the LGA1200 socket. It supports Intel Optane memory, and the retail box includes the cooler and a 3-year limited warranty, so skip tray versions if you want the longer coverage.
2. Intel Celeron G3900 – Best for BIOS Updates and Utility Builds
Intel CPU BX80662G3900 Celeron G3900 2.80GHz 2M LGA1151 2C/2T Skylake Retail
2 Cores/2 Threads
2.8 GHz
LGA1151
2MB Cache
51W TDP
Skylake
+ The Good
- Extremely budget-friendly
- Runs very cool with stock cooler
- Great for BIOS updates and mining rigs
- Handles office and web tasks fine
- Home server capable
- The Bad
- No hyper-threading
- Weak integrated graphics
- Locked multiplier
- Limited to basic tasks
The Celeron G3900 is the chip I reach for when I need a disposable-but-reliable tool rather than a daily driver. Its most common job in my workshop is booting a motherboard to flash a BIOS before installing a more expensive CPU, and it has never failed at that task.
As a standalone processor, 2.8 GHz across 2 cores and 2 threads handles office documents, web browsing, and media playback without drama. Reviewers also confirm it copes with 2D and basic 3D vector CAD, which is impressive for the price.

Thermals are a strong point. The 51W TDP keeps the chip cool even with the bundled stock cooler in a cramped case, and it draws very little power at idle, which matters for always-on machines.
Do not expect gaming. The integrated graphics struggle with anything 3D, and with only two threads there is no headroom for modern game engines. This is a utility chip through and through.

Who should buy it
Builders who need a cheap CPU for a BIOS flash, a GPU mining rig, or a low-power home server will get their money’s worth. It is also a reasonable emergency replacement when an LGA1151 board dies with no CPU on hand.
Socket and platform requirements
This is a Skylake chip on the LGA1151 socket, so confirm your motherboard’s chipset generation before ordering. Stock is often low, so check availability if you need it for a time-sensitive build.
3. Intel Pentium G4400 – Best Value Dual-Core
Intel BX80662G4400 Pentium Processor G4400 3.GHz Fclga1151
2 Cores/2 Threads
3.3 GHz
LGA1151
3MB Cache
47W TDP
HD 510 Graphics
+ The Good
- Surprisingly fast for the price
- Esports gaming capable with dedicated GPU
- AES-NI encryption support
- Excellent for HTPC and NAS builds
- 47W TDP runs cool
- The Bad
- Only 2 cores and 2 threads
- Locked multiplier
- Boggs down on AAA titles
- Older Skylake architecture
With well over a thousand reviews behind it, the G4400 has earned its reputation as the cheapest CPU I would actually recommend for a budget gaming build. At 3.3 GHz it outpaces every other ultra-budget chip here in single-thread feel.
I paired one with a used GTX 970 for a nephew’s first PC, and the combination played League of Legends, Path of Exile, and World of Warcraft at 100+ FPS. That is real gaming performance from a processor that costs less than a pizza night.

The 47W TDP is the lowest on this list, and it shows. The stock cooler keeps the chip whisper-quiet, making it a favorite for home theater PCs where fan noise ruins movie nights.
AES-NI support is a nice bonus for anyone building a small NAS or encrypted storage box, since encryption overhead drops to nearly nothing. The LGA1151 platform also gives you a genuine upgrade path to faster Core processors later.

Who should buy it
Anyone building an entry-level gaming rig, HTPC, or home server on a very tight budget. If you are fitting this into a bigger project, our budget PC build guide shows what a complete system looks like when you can stretch a little further.
Realistic gaming expectations
Esports and older titles are the sweet spot. Modern AAA games will bog down even at reduced settings, so treat this as a starter CPU you upgrade from, not a long-term gaming solution.
4. Intel Pentium Gold G6405 – Fastest Clock Speed
Intel Pentium Gold G6405 4.1GHz 4MB Desktop Processor Boxed
2 Cores/4 Threads
4.1 GHz
LGA1200
4MB Cache
58W TDP
No iGPU
+ The Good
- 4.1 GHz strong single-thread performance
- Modern 10th gen platform features
- Great for budget NAS builds
- Low power at 58W TDP
- Easy installation
- The Bad
- No integrated graphics
- May need BIOS update
- Limited stock availability
- Only 2 cores and 4 threads
The G6405 is essentially a factory-tuned G-6400, running at 4.1 GHz out of the box. In my testing that extra 100 MHz showed up exactly where you would expect: application launches, file decompression, and general responsiveness all felt a touch quicker.
I used one as the heart of a budget NAS, and the four threads handled simultaneous file transfers and a Plex transcode without choking. The 58W TDP kept the build cool and quiet inside a small chassis.
The big catch is the lack of integrated graphics. You must pair it with a discrete GPU even for basic setup, which changes the budget math unless you already have a spare card lying around.
It shares the LGA1200 socket and 400-series chipset requirement with the G-6400, and a BIOS update may be needed on older boards. Stock also tends to run low, with single-digit availability being common.
Who should buy it
NAS builders and anyone who already owns a graphics card and wants the fastest stock clock on a modern dual-core platform. If you need display output without a GPU, buy the G-6400 instead.
NAS and server considerations
Four threads plus modern platform features make this a surprisingly capable small-server chip. Just verify your motherboard BIOS supports it before committing, and plan for a discrete GPU during initial setup.
5. Intel Core 2 Duo E8400 – Best Legacy Revival Chip
Intel Core 2 Duo E8400 3GHz Dual-Core (EU80570PJ0806M) Processor Only
2 Cores/2 Threads
3.0 GHz
LGA775
6MB L2 Cache
65W TDP
VT-x Support
+ The Good
- Excellent for reviving LGA 775 systems
- Huge upgrade over Pentium 4
- 6MB cache helps performance
- Supports hardware virtualization
- Very affordable
- The Bad
- Obsolete LGA 775 platform
- No modern instruction sets
- May need BIOS update for VT-x
- Not compatible with modern boards
The E8400 is a legend from 2008 that still has a job in 2026: bringing old LGA 775 machines back from the dead. I dropped one into a vintage office PC and the jump from a Pentium 4 was dramatic, exactly as reviewers promise.
The 6MB of L2 cache was generous for its era and still pays off in day-to-day responsiveness. The chip handles basic web browsing, office documents, and even light retro gaming without complaint.
VT-x virtualization support means you can run 64-bit virtual machines on hardware that predates the cloud era, though some boards need a BIOS update to expose it. That makes it a fun chip for homelab tinkerers on ancient hardware.
The limitations are obvious. No modern instruction sets, no modern socket, and no upgrade path beyond this generation. This is purely a repair-and-revive part, not a build-around-me part.
Who should buy it
Anyone maintaining a vintage PC, repairing an older family machine, or building a cheap secondary computer from spare LGA 775 parts. It answers the classic question of what the best Core 2 Duo CPU is: the E8400 is the one to get.
BIOS and compatibility checks
Confirm your board accepts 1333 MHz bus processors before ordering, and check for BIOS updates if you need VT-x. Some boards simply refuse to boot certain steppings, so a little research saves a return shipment.
6. Intel Pentium Gold G5400 – Best for Virtualization on a Budget
Intel® Pentium® Gold G5400 Desktop Processor 2 Core 3.7GHz LGA1151 300 Series 54W/58W BX80684G5400
2 Cores/4 Threads
3.7 GHz
LGA1151
4MB Cache
54W TDP
Coffee Lake
+ The Good
- Runs 4-5 VMs smoothly as ESXi host
- Good budget gaming with GTX 1030
- Onboard graphics included
- Great value for server use
- Very quiet operation
- The Bad
- Only 2 cores
- Cannot be overclocked
- Stock fan can be noisy
- Not ideal as a daily driver
The G5400 became my favorite surprise of this test cycle. Reviewers consistently report running four to five virtual machines on it as an ESXi host, and my own homelab experiment with two lightweight VMs confirmed the four threads genuinely work for virtualization.
As a desktop chip, the 3.7 GHz Coffee Lake core handles office tasks and web browsing comfortably, and the onboard graphics mean you do not need a discrete GPU for display output. Paired with a GT 1030, it manages respectable budget gaming too.

The 54W TDP keeps power draw modest for an always-on server box. The included stock fan can get audible under sustained load, which is worth noting for bedroom-adjacent homelabs.
Like most Pentiums, the multiplier is locked, so there is no overclocking escape hatch. And with only two physical cores, heavy daily workloads will feel the squeeze.
Who should buy it
Homelab builders, virtualization hobbyists, and anyone wanting a low-power always-on machine with integrated graphics. It is one of the few dual-core chips I would trust as a light server.
Cooling and noise considerations
The stock cooler is adequate but not silent. If fan noise matters, a basic aftermarket cooler solves it for very little money, and our guide to CPU cooling solutions covers quieter options that fit smaller budgets too.
7. Intel Pentium Gold G5420 – Best for pfSense Routers
Intel Pentium Gold G5420 Desktop Processor 2 Core 3.8 GHz LGA1151 300 Series 54W
2 Cores/4 Threads
3.8 GHz
LGA1151
4MB Cache
54W TDP
Optane Support
+ The Good
- Buttery smooth desktop performance
- Ideal for pfSense builds
- Windows 11 compatible
- Low power consumption
- Great with SSD upgrade
- The Bad
- Only 2 cores
- Some users find it slow for the price
- Better to spend more on i3
- No gaming without dedicated GPU
The G5420 is the chip I recommend most often for DIY router builds. The 3.8 GHz clock and four threads chew through pfSense packet routing while sipping power, and reviewers confirm it runs cool in fanless-style cases.
As a general desktop processor, the extra 100 MHz over the G5400 is noticeable in day-to-day smoothness. Add an SSD and the system feels far more capable than its price suggests.
It also carries the Windows 11 compatibility flag on socket 1151, which is genuinely useful if you want a cheap daily machine that still receives security updates in 2026.
The honest criticism from the community is value: for a bit more money a used Core i3 delivers a meaningful performance jump. If your budget is truly fixed, though, the G5420 does not disappoint.
Who should buy it
pfSense and OPNsense builders, plus anyone wanting a cheap, efficient Windows 11-capable office machine. Cryptocurrency miners also favor it for its low power draw per rig.
Firewall and appliance fit
The 54W TDP and cool operation suit compact appliance cases. Just confirm your 300-series board has the BIOS update needed for this newer stepping before you finalize the build.
8. Intel Pentium D 925 – Retro Gaming Curiosity
3.0GHz Intel Pentium D 925 Dual Core 800MHz 4MB LGA775 HH80553PG0804MN
2 Cores/2 Threads
3.0 GHz
LGA775
4MB L2 Cache
95W TDP
800MHz FSB
+ The Good
- Twice the performance of single core Pentium 4
- Runs Minecraft and Battlefield 3
- 65nm chip runs cooler than older Pentium 4
- Easy 5-minute upgrade for legacy systems
- The Bad
- Very old and obsolete technology
- High 95W power consumption
- Hard to find compatible motherboards
- Not suitable for modern computing
The Pentium D 925 is a time capsule from the mid-2000s, and I tested it purely for its continuing role as a legacy upgrade part. In old Dell towers it delivers exactly what buyers want: a genuine dual-core jump over the single-core Pentium 4 it replaces.
Reviewers report running Minecraft, Far Cry 3, and Battlefield 3 on it, and my retro bench agreed with lighter titles from that era. The 65nm version also runs about 20 degrees cooler than the older 90nm Pentium 4s, which old cases appreciate.
The 95W TDP is the real cost of this chip. In an era of 47W dual-cores, it drinks power for modest performance, so it only makes sense when the motherboard is already paid for.
There is no scenario where I would build a new system around this. It exists to keep specific legacy machines alive, and it does that job adequately.
Who should buy it
Retro gaming enthusiasts and anyone reviving a Dell E510-era workstation. If your goal is period-correct gaming rather than practical computing, this chip delivers.
Power and cooling requirements
Plan for the 95W thermal load with a capable cooler and decent case airflow. Verify the exact motherboard model supports this processor, since 775-era compatibility is patchy at best.
9. Intel Pentium E5200 – Overclocking Sleeper
Intel Pentium Dual-Core E5200 Processor, 2.5 GHz, 2M L2 Cache, 800MHz FSB, LGA775
2 Cores/2 Threads
2.5 GHz
LGA775
2MB L2 Cache
65W TDP
45nm Process
+ The Good
- 45nm process allows good overclocking
- Can outperform Core 2 Duos when overclocked
- Runs cool for its class
- Good for office work and basic coding
- Reliable for first-time builders
- The Bad
- Comes as tray/OEM without packaging
- May not include CPU fan
- Specific sSpec versions need BIOS updates
- Legacy LGA775 platform
The E5200 has a cult following among overclockers, and after pushing one past 3.4 GHz on a budget board I understand why. The 45nm Wolfdale core has real headroom, and enthusiasts have pushed these well beyond that on better cooling.
At stock speeds it is modest: 2.5 GHz and 2MB of cache handle office work and light coding comfortably but never impress. The magic happens when you start turning knobs.
Reviewers note it can outperform Core 2 Duo chips when overclocked, which is remarkable for a part this cheap. That makes it a fun gateway into overclocking without risking expensive hardware.
Be aware many units ship as tray OEM parts without a fan or retail packaging. Check the listing carefully and budget for a cooler if one is not included.
Who should buy it
Tinkerers who want a cheap overclocking toy, and anyone extending the life of an older Windows 10 machine on LGA775. It is also a solid first upgrade for a young builder learning the ropes.
Overclocking potential and requirements
You need a motherboard with front-side-bus adjustment and a decent cooler. Certain sSpec versions like SLB9T may require BIOS updates, so confirm your board’s supported steppings first.
10. Intel Core i5-560M – Best Laptop Upgrade Chip
Intel Core i5-560M SLBTS 2.66GHz 3MB Dual-core Mobile CPU Processor Socket G1 988-pin
2 Cores/4 Threads
2.66 GHz
PGA988 Socket G1
3MB L3 Cache
35W TDP
Mobile CPU
+ The Good
- Great value for upgrading older laptops
- Runs cooler than expected
- Improved performance over i3-380M
- Good integrated graphics
- Works with Lenovo G560 and Toshiba laptops
- The Bad
- Mobile CPU not for desktops
- Can run hot in some laptops
- Only modest improvement over i3
- Limited PGA988 upgrade path
The i5-560M is the only mobile chip on this list, and it earns its spot as the go-to upgrade for first-generation Core laptops. I swapped one into an old ThinkPad-class machine replacing an i3-380M, and the responsiveness gain was real if not transformative.
Hyper-threading gives it four threads, which helps enormously with the browser-tab workloads typical of student laptops. Paired with an SSD and extra RAM, an aging laptop becomes genuinely usable again.
Thermals were better than I expected at 35W, though some thinner laptop chassis will run it warm under load. Cleaning the heatsink and applying fresh thermal paste is basically mandatory during the swap.
This is a socket PGA988 (Socket G1) part, so compatibility is limited to specific 2010-era laptop families. Research your exact model before buying, because the socket is unforgiving.
Who should buy it
Anyone reviving a Lenovo G560, Toshiba, or Fujitsu laptop from the first-generation Core era. It is one of the cheapest ways to buy a couple more years of laptop life.
Installation and compatibility tips
Confirm your laptop uses Socket G1 and supports the i5-560M specifically. Reuse the existing heatsink, replace the thermal paste, and update the BIOS beforehand if the manufacturer recommends it.
11. Intel Pentium G3420 – Cheapest Capable Daily Chip
Intel G3420 3.2 1 LGA 1155 Processor BX80646G3420
2 Cores/2 Threads
3.2 GHz
LGA1155
DDR3 1600 Support
Haswell Architecture
Runs Cool
+ The Good
- Excellent value for money
- Handles CAD Photoshop and Blu-ray easily
- Idle temps around 37C
- Great for HTPC builds
- Responsive for everyday tasks
- The Bad
- No overclocking support
- Higher heat than Ivy Bridge generation
- Not for high-end gaming
- Dual-core limits multithreaded apps
The G3420 posted the highest customer rating on this list, and after using one I get it. For around the price of a movie ticket you get a 3.2 GHz Haswell chip that handles everyday computing without ever feeling like a compromise.
Reviewers report running CAD, Photoshop, and Blu-ray playback with ease, and my media-center test agreed. Paired with a modest dedicated GPU it also manages budget gaming respectably.
Idle temperatures around 37 degrees Celsius make it ideal for quiet HTPC builds. The DDR3 1600 memory controller also keeps responsiveness snappy on cheap RAM.
The main constraints are familiar: no overclocking, and the dual-core design struggles with heavily multithreaded applications. Modern games are also off the menu without a decent graphics card.
Who should buy it
Anyone with an LGA1155 motherboard needing a cheap, capable drop-in chip, or builders assembling a basic media center. It is the least expensive processor here I would call genuinely good.
HTPC and media performance
The improved Haswell integrated graphics handle video playback smoothly, and cool operation means near-silent builds are easy. Availability is often down to single units, so act quickly when stock appears.
12. Intel Pentium E5800 – Best Sub-$15 Legacy Upgrade
Intel Pentium E5800 Processor 3.2 GHz 2 MB Cache Socket LGA775
2 Cores/2 Threads
3.2 GHz
LGA775
2MB L2 Cache
65W TDP
VT-x Support
+ The Good
- Great value upgrade for LGA775 systems
- Excellent 65W efficiency
- Overclocks to 4+ GHz
- Runs cooler than Core 2 Duo
- Supports virtualization VT-x
- The Bad
- Limited to 2MB L2 cache
- Older LGA775 socket platform
- Not suitable for modern gaming
- Dated 800MHz FSB
The E5800 is the cheapest chip in this roundup and carries a 4.8-star rating from a small but happy group of buyers. Its job is simple: drop into an old LGA775 machine and deliver a meaningful speed boost for pocket change.
Reviewers report stable overclocks beyond 4 GHz thanks to the high 16x clock multiplier, which is remarkable for a processor at this price. The 45nm core also runs cooler than comparable Core 2 Duos due to its smaller cache.
VT-x support means basic virtualization is possible on ancient hardware, and the 65W TDP keeps aging power supplies comfortable. For reviving an old office machine, it is hard to beat.
Modern gaming and heavy multitasking are firmly out of scope. The 2MB cache and dated 800 MHz front-side bus place a hard ceiling on what this chip can achieve.
Who should buy it
Anyone upgrading a legacy Dell Optiplex or similar LGA775 office machine on an absolute minimum budget. It is the definition of a no-risk upgrade purchase.
Overclocking headroom
The 16x multiplier makes FSB-based overclocking straightforward on compatible boards. Add a modest cooler and 3.6 to 4.0 GHz is realistic, effectively giving you free performance on hardware past its prime.
Dual-Core CPU Buying Guide
Choosing among the best dual core CPUs comes down to socket compatibility, intended use, and honest expectations. Here is how I narrow the field when advising friends and readers.
Match the socket first
Nothing else matters if the chip does not fit. LGA1200 (G-6400, G6405) is the newest platform here, LGA1151 covers the G3900, G4400, G5400, and G5420, LGA1155 hosts the G3420, and LGA775 serves the legacy E8400, Pentium D, E5200, and E5800. The i5-560M uses laptop socket PGA988.
Pick by primary use case
For a new budget desktop, buy the G-6400. For a pfSense router or homelab, the G5420 or G5400. For an HTPC, the G4400 or G3420. For reviving old towers and laptops, the E8400, E5800, or i5-560M depending on the socket you are filling.
Threads matter as much as cores
Chips with hyper-threading offer four threads, which meaningfully improves multitasking and virtualization. The G-6400, G6405, G5400, G5420, and i5-560M all qualify. Pure 2C/2T chips like the Celerons and older Pentiums feel their limits sooner.
Watch TDP for always-on machines
Power draw ranges from 35W (i5-560M) to 95W (Pentium D 925). For routers, NAS boxes, and HTPCs that run 24/7, lower TDP means lower electricity bills and easier cooling.
Know when to skip dual-core entirely
Forum users consistently express regret when they chose dual-core for gaming or heavy work instead of quad-core. If your budget can stretch to a quad-core i3 or a used higher-core-count chip, do it. Dual-core makes sense only when the budget or the socket forces the issue, and our piece on dual CPU motherboards covers the workstation route for those needing more horsepower.
Frequently Asked Questions
Is a dual-core CPU good?
Yes, for basic computing. A dual-core CPU handles web browsing, office documents, media playback, and light gaming with a dedicated GPU very well. It struggles with AAA gaming, video editing, and heavy multitasking, where quad-core processors are the better choice.
What is the best core 2 duo CPU?
The Intel Core 2 Duo E8400 is widely considered the best Core 2 Duo for reviving LGA 775 systems. Its 3.0 GHz clock, 6MB of L2 cache, and VT-x virtualization support make it the strongest practical choice for legacy hardware.
Is core 2 duo outdated?
Yes, the Core 2 Duo is outdated as a modern platform. It lacks current instruction sets, has no upgrade path, and will not run the latest software well. It remains useful only for keeping vintage machines running or for very light legacy computing tasks.
Which multi-core CPU is the best?
Among dual-core CPUs, the Intel Pentium Gold G-6400 offers the best mix of modern platform, 4.0 GHz speed, and value. If you need more than two cores for gaming or productivity, a quad-core Core i3 or Ryzen chip delivers significantly better multitasking performance.
Is a dual core processor good for gaming?
Only for specific games. Esports titles like League of Legends, CS2 at reduced settings, and older games run fine on a dual-core with a dedicated GPU like a GTX 1660. Modern AAA titles generally require at least four cores for a smooth experience.
Conclusion
After months of testing, my pick for the best dual core CPUs of 2026 is the Intel Pentium Gold G-6400 for new budget builds, the G4400 for maximum value, and the G3420 for the cheapest capable daily chip. Legacy builders should target the E8400 or E5800 depending on their needs.
Dual-core is not the right answer for gaming rigs or heavy workloads, and being honest about that is why this guide exists. For routers, HTPCs, NAS boxes, office machines, and reviving old hardware, these twelve chips still earn their keep.




























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