Intel

Intel Core i9-12900K

Expert rating7.9 / 10

Brand:: Intel
Form Factor:: Desktop
CPU Socket:: FCLGA1700
Core/Thread Count:: 16 Core (8P+8E) / 24 Thread
TDP:: 125 W
iGPU:: Intel UHD Graphics 770
CPU Series:: Core i9

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Manufacturer: Intel Last updated: 2026-09-12

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Intel Core i9-12900K Review

Intel Core i9-12900K 16-core 24-thread desktop processor, 3.2GHz base / 5.2GHz boost, 125W TDP, Alder Lake, LGA 1700 socket

The Intel Core i9-12900K is an unlocked flagship desktop processor for overclocking and high-end gaming. It pairs 16 cores and 24 threads with a 3.2GHz base clock that boosts up to 5.2GHz and Intel UHD Graphics 770 graphics, all within a 125W envelope.

Performance and Architecture

With 16 cores and 24 threads, the Intel Core i9-12900K runs a 3.2GHz base clock that boosts up to 5.2GHz, backed by 30MB of L3 cache and Intel UHD Graphics 770 graphics on the Alder Lake architecture.

Platform and Deployment

The Intel Core i9-12900K uses the LGA 1700 platform in a 125W envelope, positioned as an unlocked flagship desktop processor for overclocking and high-end gaming..

Comparison to Alternatives

Within the Core i9 lineup in this catalog, the Intel Core i9-12900K sits at the 16-core tier, differentiated mainly by clock speed, TDP, and socket from its closest siblings. Against AMD's Ryzen desktop processors in this catalog at a similar tier, the Intel Core i9-12900K competes on platform ecosystem and per-core efficiency, while against Intel's own Core Ultra desktop parts in this catalog it occupies a narrower, more specialized deployment niche.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7.9 / 10

The Intel Core i9-12900K is an unlocked overclockable chip, well suited to enthusiast gaming and productivity builds.

Best for

Enthusiast desktop gaming
Overclocking
High-end productivity

Not for

Laptops
Fanless designs
Extreme power efficiency needs

Specifications

What these specs mean

Identity

Product Line	Core
Model Number	i9-12900K
Codename	Alder Lake
Release Year	2021

Segment and platform

Market Segment	Desktop
Microarchitecture	Alder Lake
Socket	FCLGA1700
Socket Status	Mature
Process Node	10 nm

Core configuration

Total Cores	16
Performance Cores	8
Efficiency Cores	8
Total Threads	24
SMT Enabled	Yes

Clock speeds

P-Core Base Clock	3.2 GHz
P-Core Boost Clock	5.1 GHz
E-Core Base Clock	2.4 GHz
E-Core Boost Clock	3.9 GHz
Unlocked Multiplier	Yes

Cache

L2 Cache	14 MB
L3 Cache	30 MB

Power and thermal

Base Power	125 W
Max Turbo Power	241 W
Bundled Cooler	None

Memory

Memory Type	DDR5 or DDR4
Max Memory Speed	4800 MT/s
Memory Channels	2
Max Memory Capacity	128 GB

Graphics and AI

Integrated Graphics	Yes
iGPU Model	Intel UHD Graphics 770
iGPU Compute Units	32
Copilot Plus Certified	No

Expansion

PCIe Generation	PCIe 5.0
PCIe Lanes	20

Commercial

Launch MSRP	589 USD
Retail Availability	Boxed Retail

Form Factor	Desktop
TDP	125 W
iGPU	Intel UHD Graphics 770

FAQs

What are the key specifications of the Intel Core i9-12900K?

The Intel Core i9-12900K has 16 cores and 24 threads, a 3.2 GHz base and 5.1 GHz boost clock, 30 MB of L3 cache and a 125 W TDP. Integrated graphics: Intel UHD Graphics 770. Socket: FCLGA1700.

Will the Intel Core i9-12900K work with my current setup?

The Intel Core i9-12900K lists Socket is FCLGA1700. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.