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Silver rectangular CPU with gold contact pads and green substrate visible on LGA1700 package

Intel

Intel Core i9-12900K desktop processor 16-core 5.2 GHz LGA1700

SKU CH-8XPC-JKS5B

16-core desktop processor with 8 performance and 8 efficient cores reaching 5.2 GHz turbo on LGA1700

  • Product nameCore i9-12900K
  • CPU cores16-Core (8P+8E)
  • CPU socketLGA 1700
  • Maximum turbo clock5.2 GHz
  • TDP rating125 W
  • Processor classDesktop
  • 16 cores and 24 threads handle heavy multitasking with ease
  • Max turbo frequency of 5.2 GHz delivers responsive single-thread speed
  • 30 MB L3 cache reduces latency for demanding workloads
  • Supports DDR4 3200 and DDR5 4800 memory for flexible platform choices
  • Integrated UHD Graphics 770 provides display output without a discrete card

16-core 24-thread desktop processor for enthusiasts

The Intel Core i9-12900K delivers 16 cores split into 8 performance and 8 efficient cores with 24 threads. Base frequency sits at 3.2 GHz and max turbo reaches 5.2 GHz. It supports DDR4 3200 and DDR5 4800 memory up to 128 GB. Integrated Intel UHD Graphics 770 handles display output without a discrete card.

Upgrade from LGA1700 600 series or earlier platforms

Moving to this 12th Gen Alder Lake architecture brings a hybrid core design and 30 MB L3 cache. The jump is worth it when workloads benefit from mixed core types and higher turbo frequencies. A 600 series chipset motherboard with LGA1700 socket is required for installation.

Straightforward LGA1700 socket installation

The processor drops into the LGA1700 socket on a compatible motherboard. No integrated cooler is included so a suitable aftermarket solution must be mounted. Applying thermal paste evenly and securing the cooler pressure avoids thermal throttling under the 125 W base power rating.

How it compares

Measured against everything we stock in Desktop Processors, at today’s prices. Recalculated every night.

Price $381.99
Pricier than about 80% of the 494 comparable items (median $149.99).
CPU cores 16-Core (8P+8E)
Higher than about 70% of the 271 comparable items (median 8).
Maximum turbo clock 5.2 GHz
Higher than about 70% of the 246 comparable items (median 4.7 GHz).

New to this? Buying a processor with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameIntel
Product lineCore i9 12th Gen
Product nameCore i9-12900K
Performance
Working frequency3.2 GHz
Processor
CPU cores16-Core (8P+8E)
CPU socketLGA 1700
Maximum turbo clock5.2 GHz
TDP rating125 W
Processor classDesktop
Processor codenameAlder Lake
CPU threads24-Threads
Level 2 cache14 MB
CPU instruction set64-Bit
Hyper-ThreadingYes
Virtualization supportYes
Max PCIe lanes20
Memory
Supported memoryDDR4 3200 / DDR5 4800
Channel configuration2
Memory limit128 GB
ECC memorySupported
Maximum memory bandwidth76.8 GB/s
Graphics
Built-in graphicsIntel UHD Graphics 770
GPU base clock300 MHz
Graphics max dynamic frequency1.55 GHz
Ports & slots
PCIe generation5.0 and 4.0
Compatibility
Compatible systemsWindows 11

Questions about this item

What motherboard socket and chipset does the Core i9-12900K require?

The processor fits an LGA 1700 socket and is built for 600 series chipset motherboards.

Which way round does the LGA 1700 processor sit in the socket?

Align the gold triangle on the CPU corner with the matching triangle marker on the socket frame before lowering the retention lever.

Will the integrated Intel UHD Graphics 770 need a driver update after installation?

Yes, download the latest graphics driver from Intel to enable full feature support and stability for the UHD 770 iGPU.

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