Intel Core i9-9900K vs Intel Core i9-7900X

Compare Intel 9th Generation Core i9 8 core CPU vs Intel Core X-series 10 core processor, specs and benchmark score. Which is the better CPU for gaming?

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The cheapest price from our partner retailers

$ 391
$ 209.31 significantly less expensive
$ 600

Benchmark Score

Overall Score

A combined score of all workloads

84 %
85 %
1% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

100 %
8% slightly better gaming score
92 %

Multitasking Score

Performance in workloads using up to 8 cores

79 %
83 %
5% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

77 %
83 %
7% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Core i9-9900K and the Core i9-7900X? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Multi threaded benchmark

16% slightly higher Geekbench (multi) score

Geekbench (single) score

Single threaded benchmark

18% slightly higher Geekbench (single) score

3DMark Physics score

Physics simulation benchmark

4% slightly higher 3DMark Physics score



Number of physical processing units

25% slightly more cores


Number of logical processing units

25% slightly more threads

Clock Speed

Base frequency at which the chip operates

4 GHz
9% slightly higher clock speed
3 GHz

Turbo Speed

Higher frequency used for heavy workloads

5 GHz
16% slightly higher turbo speed
4 GHz


Thermal Design Power: Measure of heat generated by the CPU

95 W
47% significantly lower TDP
140 W

PCIe Lanes

Number of physical connections between the CPU and expansion slots

175% significantly more pcie lanes

Memory Channels

Lanes for simultaneous memory access

100% significantly more memory channels

Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB
128 GiB

L1 Cache

Smallest embedded memory, but the fastest

512 KiB
640 KiB
25% slightly more L1 cache

L3 Cache

General memory pool for all cores

16 MiB
14% slightly more L3 cache
14 MiB

Other details


Ranking in the hardwareDB database

101st of 1,327
98th of 1,327


The product line

9th Generation Core i9
Core X-series

Release date

The official date of release of this chip

November 2018
May 2017

Memory Type

The type of memory used by this chip


Is Unlocked

Can this CPU can be overclocked


Supports ECC memory

Does this CPU support error correcting memory


Core i9-9900K vs Core i9-7900X specs and performance

In our benchmarks, the Core i9-7900X beats the Core i9-9900K in overall performance. Despite this, the Core i9-9900K has the advantage in our gaming benchmark.

With info from our database, we find that the Core i9-7900X has slightly more cores with 10 cores whereas the Core i9-9900K has 8 cores. It also has more threads than the Core i9-9900K. With our hardware info, we find that the Core i9-9900K has a slightly higher clock speed than the Core i9-7900X. Also, the Core i9-9900K has a slightly higher turbo speed. A Core i9-9900K CPU outputs less heat than a Core i9-7900X CPU because of its significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption.

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 i9-9900K has more threads than cores. Each physical core is split into multiple threads.


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