Intel Core Ultra 5 245K 4.2GHz 6x P-Cores 8x E-Cores LGA1851

Description

Arrow Lake with Intel’s First Real Desktop iGPU

The 245K’s compute tile is built on TSMC’s 3nm EUV node, while the graphics tile is built on TSMC’s 5nm process — both connected via Intel’s Foveros 3D packaging alongside the SoC and I/O tiles on TSMC 6nm. This multi-chiplet design marks Intel’s first mainstream desktop processor with a meaningfully capable integrated GPU. The iGPU is based on Intel’s Xe-LPG architecture with 4 Xe cores, clocking up to 1.9 GHz at stock — 100 MHz lower than the higher-tier 265K and 285K models. The Xe-LPG architecture is a significant step up from the Xe-LP iGPU found in Raptor Lake, bringing full DirectX 12 Ultimate support including hardware ray tracing, mesh shaders, and sampler feedback — enabling light gaming and capable desktop use without any discrete GPU installed.

CPU Performance and Overclocking

The 245K’s 6 Lion Cove P-cores deliver strong single-threaded performance at frequencies up to 5.2 GHz, supported by 8 Skymont E-cores handling background workloads up to 4.6 GHz. Intel Thread Director manages dynamic workload allocation between core types in real time without user intervention. The unlocked multiplier and Arrow Lake’s revised overclocking framework are fully available — dual BCLK tuning, 16.6 MHz multiplier granularity, and Intel XTU monitoring all apply. The iGPU frequency is also overclockable, with community testing demonstrating meaningful performance headroom beyond stock speeds. ECC memory is supported, adding value for reliability-sensitive workloads and small business environments.

Platform Considerations

The 245K requires an Intel 800-series (Z890) LGA 1851 motherboard — it is not compatible with LGA 1700 boards. DDR5 memory up to 6400 MT/s is officially supported in single DIMM-per-channel configurations, with Intel XMP profiles for memory tuning. The integrated NPU delivers up to 22 TOPS for AI-accelerated applications. For builders who don’t need integrated graphics and want to save slightly, the 245KF is the identical chip without the iGPU.

⚠️ No cooler included — a quality 240mm AIO or tower air cooler is recommended for this processor.

Key Highlights:

• 14 cores (6 P-cores + 8 E-cores) / 14 threads, Arrow Lake Series 2 (TSMC 3nm)
• P-core base: 4.2 GHz | P-core max turbo: 5.2 GHz
• E-core base: 3.6 GHz | E-core max turbo: 4.6 GHz
• 24MB L3 Smart Cache + 26MB L2 cache
• LGA 1851 socket | DDR5 support (up to 6400 MT/s) | PCIe 5.0 & 4.0
• 125W base power / 159W maximum turbo power
• Integrated Intel Arc Xe-LPG graphics (4 Xe cores, up to 1.9 GHz) — DirectX 12 Ultimate, hardware ray tracing
• Integrated NPU — up to 22 TOPS for AI workloads
• Intel Thread Director — automatic P-core/E-core workload scheduling
• Turbo Boost 2.0 & Turbo Boost Max 3.0
• Unlocked multiplier — overclocking supported (Z890 required)
• ECC memory supported
• Compatible with Intel 800-series LGA 1851 motherboards only (Z890)

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