Intel Core i9-12900K vs Intel Core Ultra 9 275HX

Compare Intel 12th Generation Core i9 16 core CPU vs Intel 24 core processor, specs and benchmark score. Which is the better CPU for gaming?

CPU Comparison

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Benchmark Score

Overall Score

A combined score of all workloads

13331 points
15155 points
13% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

14234 points
14741 points
3% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

13035 points
15354 points
17% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

12983 points
15488 points
19% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Core i9-12900K and the Core Ultra 9 275HX? Download our free and quick PC Performance Test.

Other Benchmarks

3DMark Physics score

3DMark Physics score

Physics simulation benchmark

11701 points
16352 points
39% slightly higher 3DMark Physics score
Blender score

Blender score

Cycles Render (Samples per minute)

364.47 points
466.44 points
27% slightly higher Blender score
Geekbench 6 (multi) score

Geekbench 6 (multi) score

Multi threaded benchmark

15365 points
17922 points
16% slightly higher Geekbench 6 (multi) score
Geekbench 6 (single) score

Geekbench 6 (single) score

Single threaded benchmark

2616 points
2844 points
8% slightly higher Geekbench 6 (single) score

Specifications

Cores

Number of physical processing units

16
24
49% significantly more cores

Threads

Number of logical processing units

24
Identical
24

Clock Speed

Base frequency at which the chip operates

3.2 GHz
18% slightly higher clock speed
2.7 GHz

Turbo Speed

Higher frequency used for heavy workloads

5.2 GHz
5.4 GHz
3% slightly higher turbo speed

PCIe Lanes

Number of physical connections between the CPU and expansion slots

20
24
20% slightly more pcie lanes

Memory Channels

Lanes for simultaneous memory access

2
Identical
2

Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB
256 GiB
100% significantly more supported memory

L3 Cache

General memory pool for all cores

30 MiB
36 MiB
20% slightly more L3 cache

Other details

Rank

Ranking in the hardwareDB database

39th of 1,089
21st of 1,089

Family

The product line

12th Generation Core i9
Core Ultra (Series 2)

Release date

The official date of release of this chip

2021 November
2025 February

Memory Type

The type of memory used by this chip

DDR5-4800
DDR5-6400

Is Unlocked

Can this CPU can be overclocked

Yes
-

Supports ECC memory

Does this CPU support error correcting memory

Yes
No

Core i9-12900K vs Core Ultra 9 275HX benchmarks

In our benchmarks, the Core Ultra 9 275HX beats the Core i9-12900K in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i9-12900K in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Core Ultra 9 275HX has significantly more cores than the Core i9-12900K. Indeed, the Core Ultra 9 275HX has 24 cores compared to 16 cores found in the Core i9-12900K. But they both have the same number of threads. These CPUs have different clock speeds. Indeed, the Core i9-12900K has a slightly higher clock speed compared to the Core Ultra 9 275HX.

Most CPUs have more threads than cores. This technology, colloquially called hyperthreading, improves performance by splitting a core into multiple virtual ones. This provides more efficient utilisation of a core. Indeed, the Core i9-12900K has more threads than cores. Each physical core is split into multiple threads.

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