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A square green ceramic chip with gold contacts and a silver heat spreader labeled Core Ultra 5 245KF

Intel

Intel Core Ultra 5 245KF BX80768245KF desktop processor

SKU CH-9E0V-MJGT6 MPN BX80768245KF

Refurbished 14-core Arrow Lake desktop processor for LGA 1851 with 24 MB L3 cache, 26 MB L2 cache, DDR5-6400 support and 125 W base power

  • Processors TypeDesktop
  • NameCore Ultra 5 245KF
  • CPU Socket TypeLGA 1851
  • Core NameArrow Lake
  • # of Cores14-Core (6P+8E)
  • # of Threads14-Threads
  • 14 cores with 6 performance and 8 efficient cores
  • Up to 5.2 GHz P-core turbo for responsive workloads
  • 24 MB L3 and 26 MB L2 cache reduce latency
  • DDR5 6400 dual-channel support up to 256 GB
  • LGA 1851 socket with PCIe 5.0 and 4.0 lanes

14-core Arrow Lake desktop CPU

The Intel Core Ultra 5 245KF is a 14-core desktop processor with six performance cores and eight efficient cores. It fits the LGA 1851 socket and has a 125 W base power rating. The chip is sold as a refurbished unit without integrated graphics.

Best for discrete graphics builds

This CPU suits builders who will pair it with a dedicated graphics card and want PCIe 5.0 and DDR5 6400 support. Systems that rely on integrated graphics or need a lower power envelope should look at other models.

125 W base power decides cooling

The processor runs at a 125 W base power with performance cores reaching up to 5.2 GHz and efficient cores up to 4.6 GHz. Your cooler and case airflow must handle this thermal load for sustained boost clocks.

Highlights

  • 14 cores with 6 performance and 8 efficient cores
  • Up to 5.2 GHz P-core turbo for responsive workloads
  • 24 MB L3 and 26 MB L2 cache reduce latency
  • DDR5 6400 dual-channel support up to 256 GB
  • LGA 1851 socket with PCIe 5.0 and 4.0 lanes

Specifications

BrandIntel
Processors TypeDesktop
SeriesCore Ultra 5 (Series 2)
NameCore Ultra 5 245KF
ModelBX80768245KF
CPU Socket TypeLGA 1851
Core NameArrow Lake
# of Cores14-Core (6P+8E)
# of Threads14-Threads
Operating FrequencyPerformance-core Base Frequency: 4.2 GHz
Efficient-core Base Frequency: 3.6 GHz
Max Turbo FrequencyP-core Max Turbo Frequency: Up to 5.2 GHz
E-core Max Turbo Frequency: Up to 4.6 GHz
L2 Cache26MB
L3 Cache24MB
Manufacturing Tech3nm (TSMC N3B)
Instruction Set64-Bit
Memory TypesDDR5 6400
Memory Channel2
Max Memory Size256 GB
Integrated GraphicsNone Integrated Graphics
PCI Express Revision5.0 / 4.0
Max Number of PCI Express Lanes24
Thermal Design Power125W
Max Turbo Power159W
Cooling DeviceCooling device not included - Processor Only
Shipping weight0.09 kg
Package size127 × 114 × 51 mm

Questions about this item

What motherboard socket does the Core Ultra 5 245KF require?

The processor fits the LGA 1851 socket, so the motherboard must use that exact socket.

Which step is often missed when installing this CPU?

Applying thermal paste and securing the cooler before powering on is the step people forget, and the chip has no integrated graphics to fall back on.

What memory will need replacing if I upgrade capacity later?

The CPU supports DDR5 6400 in dual-channel up to 256 GB, so any future capacity increase means buying DDR5 modules.

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