Intel Core i9-12900KS vs Intel Core Ultra 7 255HX

Compare Intel 12th Generation Core i9 16 core CPU vs Intel Core Ultra (Series 2) 20 core processor, specs and benchmark score. Which is the better CPU for gaming?

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Benchmark Score

Overall Score

A combined score of all workloads

14046 points
14832 points
5% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

14925 points
14976 points
0.34% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

13755 points
14778 points
7% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

13690 points
14762 points
7% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Core i9-12900KS and the Core Ultra 7 255HX? Download our free and quick PC Performance Test.

Other Benchmarks

Blender score

Blender score

Cycles Render (Samples per minute)

372.23 points
406.07 points
9% slightly higher Blender score

Specifications

Cores

Number of physical processing units

16
20
25% slightly more cores

Threads

Number of logical processing units

24
20% slightly more threads
20

Clock Speed

Base frequency at which the chip operates

3.4 GHz
41% slightly higher clock speed
2.4 GHz

Turbo Speed

Higher frequency used for heavy workloads

5.5 GHz
5% slightly higher turbo speed
5.2 GHz

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
Identical
30 MiB

Other details

Rank

Ranking in the hardwareDB database

30th of 1,089
25th 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

2022 February
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 i9-12900KS vs Core Ultra 7 255HX benchmarks

Our benchmark analysis concludes that the Core Ultra 7 255HX performs better than the Core i9-12900KS. Despite this, the Core i9-12900KS has the advantage in our gaming benchmark.

When comparing core counts for these CPUs, we notice that the Core Ultra 7 255HX has slightly more cores with 20 cores compared to the Core i9-12900KS that has 16 cores. Despite this, the Core i9-12900KS has more threads than the Core Ultra 7 255HX. Our comparison shows that the Core i9-12900KS has a slightly higher clock speed compared to the Core Ultra 7 255HX. Also, the Core i9-12900KS has a slightly higher turbo speed.

The more cores a CPU has, the better the overall performance will be in parallel workloads such as multitasking. Many CPUs have more threads than cores, this means that each physical core is split into multiple logical cores, making them more efficient. Indeed, the Core i9-12900KS has more threads than cores. Each physical core is split into multiple threads.

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