Best Intel CPUs Under £400 in 2026

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.

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.

The 6-core, 12-thread Skylake-X architecture on the LGA 2066 socket provides 28 PCI Express lanes and Intel Optane Memory readiness, making it a capable platform for high-bandwidth storage and multi-GPU setups. Its positioning on the X299 chipset offers quad-channel DDR4 memory support, which was a differentiator for memory-intensive tasks at its release. This processor is best for budget-conscious system builders seeking a used entry point into the HEDT platform for older rendering workstations or multi-card configurations, not modern gaming or AI workloads.

The 4-core, 8-thread Xeon W-2225 delivers a 4.6GHz boost clock and ECC memory support on the LGA 2066 socket, making it a stable entry-level workstation chip. Its 105W TDP and 14nm architecture provide reliable, validated performance for single-socket server boards. This processor is best for IT administrators building a basic file server or running light, mission-critical applications that require error-correcting memory.

Built on a 7nm process with 8 cores and 16 threads, this Xeon Silver processor delivers reliable server performance with a 3.0GHz boost clock and support for up to 768GB of ECC DDR4 memory. Its 85W TDP and PCIe 4.0 connectivity provide a balanced foundation for midsized data center deployments without excessive power draw. This chip is best for IT administrators managing network, storage, and compute tasks in growing organizations.

The unlocked 4.0GHz base clock and LGA 2066 socket on the Kaby Lake-X chip provide a direct entry point to the X299 platform’s overclocking headroom and quad-channel memory potential. Its single-core PassMark score of 2541 delivers competent VR-ready performance when paired with a discrete GPU, though the 112W TDP and lack of included cooler demand robust aftermarket cooling. This processor is best for budget-conscious system builders who prioritize future scalability to higher core-count X-Series CPUs over immediate multi-threaded productivity.

A 3.8GHz base clock and Hyper-Threading on its dual-core Coffee Lake design provide responsive performance for basic computing, backed by integrated UHD Graphics 630. Its 54W TDP and included boxed cooler make it a straightforward drop-in upgrade for compatible 300-series motherboards. This processor is best for office PC builders and home users needing a capable, low-cost chip for web browsing and media playback.