Find the best CPUs for AI and local LLMs in 2026
For AI work on the CPU, look for:
- Memory Bandwidth - Token generation is limited by how fast weights stream from RAM, so channels and DDR5 speed matter most
- Large RAM Support - The whole model has to fit in memory
- Wide Vector Units - AVX-512 and VNNI speed up the matrix math
- Cores for Prompt Processing - Reading a long prompt is compute-bound and scales with cores
Best CPUs under £100 for ai
Intel Core i3 14100F 4-core Intel Socket 1700
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AMD Ryzen 5 5500 6-core AM4
Why we recommend this ▼
The Zen 3 architecture and 6-core, 12-thread design deliver strong multi-threaded performance with a 19294 PassMark score, while the unlocked 65W TDP allows for easy overclocking via Precision Boost Overdrive. Its value is reinforced by the included Wraith Stealth cooler and broad compatibility with the enduring AM4 platform, making it a cost-effective drop-in upgrade. This processor is best for budget-conscious PC builders moving from an older AM4 chip who already own a dedicated graphics card and need a substantial boost in gaming and productivity.
Intel CM8066002031501
Intel Core i7 6700 3-core LGA1151
Why we recommend this ▼
The 14nm Skylake architecture delivers a 4.0GHz boost clock and 8MB of L3 cache within a 65W TDP, providing reliable quad-core, eight-thread performance for older LGA 1151 systems. Its integrated Intel HD Graphics 530 enables display output without a dedicated GPU, making it a practical drop-in upgrade for aging office desktops. This processor is best for budget-conscious users refreshing a legacy PC for basic productivity and web-based tasks.
Intel Pentium E6500 2-core LGA775
Why we recommend this ▼
The 45nm Wolfdale architecture delivers a 65W TDP and a 1066 MHz FSB, making it a cool-running option for legacy LGA 775 systems. Its 2MB L2 cache and 2.93 GHz clock speed provide adequate responsiveness for basic tasks on aging platforms. This processor is best for users maintaining vintage Windows XP or 7 machines for retro computing and simple office work.
AMD Athlon 3000G 2-core AM4
Why we recommend this ▼
The unlocked 35W Athlon 3000G stands out by integrating usable Radeon Vega 3 graphics onto a dual-core, four-thread Zen+ chip, eliminating the need for a discrete GPU in basic systems. Its 3.5GHz base clock and full AM4 socket compatibility offer a straightforward upgrade path for aging motherboards at a minimal power draw. This processor is best for office PC builders or home theater enthusiasts who need silent, low-cost 1080p video playback and light multitasking.
Intel BX80701G5900
Best CPUs under £200 for ai
Intel ULTRA 5 250K
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AMD Ryzen 7 7700X 8-core AM5
Why we recommend this ▼
With 8 Zen 4 cores boosting to 5.4 GHz and an 80 MB cache, this unlocked chip pushes past 100 FPS in demanding games on the AM5 platform. Its support for DDR5-5200 and PCIe 5.0 on 600-series boards provides a forward-looking foundation without requiring flagship pricing. This processor is best for pure gaming rig builders who prioritize high frame rates over multi-threaded workstation tasks.
AMD Ryzen 5 9600X 6-core AM5
Why we recommend this ▼
The 4nm Zen 5 architecture delivers a 5.4GHz boost clock and strong single-core performance at a 65W TDP, making it exceptionally power-efficient. Its unlocked multiplier on the AM5 socket provides a clear upgrade path and overclocking headroom, backed by integrated Radeon Graphics for basic display output. This processor is best for mainstream gamers and productivity users who prioritize cool, efficient operation without needing a discrete GPU for setup.
Intel Core i5 14400F 10-core LGA1700
Why we recommend this ▼
The 10-core hybrid architecture with a 4.7GHz boost clock and 20MB of L3 cache delivers strong single-core and multi-threaded throughput at a 65W base TDP. Its lack of integrated graphics keeps platform costs down for builders already committed to a discrete GPU, while PCIe 5.0 support provides modern connectivity. This processor is best for budget-conscious productivity users and system builders who need efficient rendering and multitasking performance without paying for unused video outputs.
Intel LF80537GF0484M
Why we recommend this ▼
The 2.16GHz Core 2 Duo T7400 pairs dual cores with 4MB L2 cache and a 667MHz FSB, a dated but functional pairing for legacy Socket 478 boards. Its 65W TDP and tray packaging make it a low-cost drop-in upgrade for older desktops, though it lacks modern features like DDR5 or PCIe 5.0. Best for hobbyists maintaining vintage systems who need a cheap, reliable CPU for basic office tasks or retro computing.
Intel BX8071514100F
Why we recommend this ▼
The 4-core, 8-thread Raptor Lake chip boosts to 4.7GHz with a 58W base power, delivering solid everyday performance without integrated graphics. It supports both DDR5 and DDR4 memory plus PCIe 5.0, giving budget builders flexibility in component choice. Best for office workers and casual gamers who already own a discrete GPU and want a low-cost, efficient upgrade for web browsing and light productivity.
AMD Ryzen 5 5000 Series 5600T 6-core AM4
Why we recommend this ▼
The 7nm Zen 3 architecture delivers strong efficiency with a 65W TDP and a 4.5GHz boost clock, making it a cool-running option for existing AM4 systems. Its 32MB of L3 cache and bundled Wraith Stealth cooler provide solid out-of-the-box value for a drop-in upgrade. This processor is best for budget-conscious PC builders seeking a capable 6-core, 12-thread chip for productivity workloads without needing a discrete GPU.
AMD Ryzen Threadripper 1920X 12-core sTR4
Why we recommend this ▼
The 12-core, 24-thread design with 64 PCIe 3.0 lanes delivers strong parallel throughput for multi-threaded workloads, backed by a 4.0GHz boost clock. Its unlocked multiplier and quad-channel DDR4 ECC support offer accessible overclocking and memory flexibility on the sTR4 platform. This processor suits budget-conscious workstation users running virtual machines or heavy batch rendering who need high core counts more than single-thread speed.
Intel Core i7 9700K 8-core LGA1151
Why we recommend this ▼
Eight physical cores with a 4.9GHz boost clock deliver strong single-thread performance for gaming, bypassing the hyperthreading overhead of its i9 sibling. The unlocked 95W TDP on the LGA 1151 socket provides straightforward overclocking headroom for users with existing 300-series motherboards. This processor is best for pure gamers seeking high frame rates who don't need the extra threads for streaming or video rendering.
Intel Xeon E5-2697 v2 12-core LGA2011
Why we recommend this ▼
Its 12 cores and 30MB L3 cache deliver a PassMark multi-core score of 7363, making it a capable workhorse for parallelized server tasks on the LGA2011 socket. This renewed unit offers a cost-effective entry point for legacy dual-socket workstations, arriving in tested condition with no visible cosmetic damage. It is best suited for homelab operators upgrading aging servers for virtualization or multi-threaded productivity workloads, not for single-threaded or gaming applications.
AMD EPYC 7551 64-core Socket FT1
Why we recommend this ▼
A 64-core, 128-thread design with integrated 128 lanes of PCIe 3.0 eliminates the need for a separate chipset, simplifying dense server builds. Its 8-channel memory architecture supports up to 2TB of DDR4 ECC RAM, providing massive capacity for memory-bound virtualization tasks. This processor is best for data center operators running highly parallel, legacy workloads who need maximum core density and I/O connectivity on a single socket.
Best CPUs under £400 for ai
Intel Core Ultra 7 270K Plus 24-core LGA1851
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AMD Ryzen 9 7900X 12-core AM5
Why we recommend this ▼
The 12-core, 24-thread Zen 4 architecture on TSMC 5nm delivers a 5.6 GHz boost clock and a massive 64MB L3 cache for dominant multi-threaded throughput. Its unlocked multiplier on the AM5 socket provides a clear upgrade path with PCIe 5.0 and DDR5 support, though you must supply your own cooling solution for the 170W TDP. This processor is best for 3D rendering artists and software compilers who need high core counts without stepping up to the flagship 7950X’s price.
Intel BX80768235
Why we recommend this ▼
The 14-core Arrow Lake chip (6P+8E) hits 5.0 GHz boost with 24MB L3 cache, and its 65W TDP keeps power draw low for a desktop CPU. It includes integrated Intel Graphics and a 3.5 TOPS NPU, plus PCIe 5.0 support, making it a solid all-rounder for productivity and light gaming. Best for budget-conscious builders who want a modern LGA1851 processor for everyday tasks and office work without a dedicated GPU.
Intel Core i7 14700K 20-core LGA1700
Why we recommend this ▼
The 20-core hybrid architecture with 8 P-cores boosting to 5.6GHz delivers a 51,966 PassMark multi-core score, making it a strong upgrade for mixed workloads on the LGA1700 platform. Its unlocked multiplier and broad DDR5/DDR4 support offer flexible overclocking and platform compatibility across 600 and 700 series chipsets. This processor is best for gamers and streamers who need high frame rates alongside multi-threaded productivity like video rendering.
AMD Ryzen 7 9800X3D 8-core AM5
Why we recommend this ▼
The 5.2 GHz boost clock and 96MB L3 cache, built on Zen 5 and 4nm, deliver top-tier gaming performance with a PassMark multi-core score of 39954. Its 120W TDP and unlocked multiplier allow overclocking on the AM5 platform, while the integrated Radeon Graphics and PCIe 5.0 support add flexibility. Best for gamers who prioritize frame rates and want a high-end CPU for demanding titles without needing a discrete GPU for basic tasks.
Intel BX8071513900F
Why we recommend this ▼
The 24-core Raptor Lake-S chip with 32 threads and a 5.6GHz boost delivers strong multi-threaded performance, scoring 48246 in PassMark, while its 65W base power keeps efficiency high. It lacks an iGPU, so a discrete graphics card is required, but it supports both DDR5 and DDR4 memory and PCIe 5.0. Best for budget-conscious productivity users who need heavy multi-core work without integrated graphics.
AMD Ryzen 5 7600X3D 6-core AM5
Why we recommend this ▼
The 96MB of 3D V-Cache gives this 6-core, 12-thread chip a distinct advantage in gaming, delivering frame rates that rival higher-tier processors while maintaining a modest 65W TDP. Its positioning as a Micro Center exclusive creates a compelling value proposition for builders who can access it, effectively bringing high-end gaming cache to a mid-range price point. This processor is best for AM5 system builders who prioritize pure gaming performance and power efficiency over heavy multi-threaded workstation tasks.
Intel Core i5 14600KF 14-core LGA1700
Why we recommend this ▼
The 14-core hybrid architecture with a 5.3GHz boost clock and unlocked multiplier delivers strong gaming and multi-threaded performance on the LGA 1700 platform. Its support for both DDR4 and DDR5 memory provides flexible build options without forcing a costly RAM upgrade. This processor is best for budget-conscious gamers and streamers who pair it with a discrete GPU and want high frame rates without overspending.
AMD Ryzen 7 5000 Series 5700X3D 8-core AM4
Why we recommend this ▼
The massive 96MB of L3 cache via 3D V-Cache technology delivers top-tier gaming performance on the proven AM4 platform. Its 8-core, 16-thread design with unlocked memory overclocking provides a substantial drop-in upgrade for aging systems without requiring a new motherboard or DDR5 memory. This processor is best for AM4 gamers seeking to maximize frame rates in cache-sensitive titles without a full platform rebuild.
Intel Xeon Gold 6132
Intel BX80673I99900X
Why we recommend this ▼
The 10-core, 20-thread Skylake X chip hits a 4.4 GHz boost and 19.25 MB cache, with quad-channel DDR4-2666 support and a 165W TDP on LGA 2066. It is unlocked for overclocking and supports Intel Optane Memory, but only works with X299 motherboards. Best for enthusiasts building a high-core-count workstation for rendering or video editing who already own or plan to buy an X299 platform.