Intel Core i9-7900X vs Intel Core i9-7940X

Compare Intel Core X-series 10 core CPU vs Intel Core X-series 14 core processor, specs and benchmark score. Which is the better CPU for gaming?

CPU Comparison

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Price

The cheapest price from our partner retailers

$ 600
$ 65.05 slightly less expensive
$ 665

Benchmark Score

Overall Score

A combined score of all workloads

85 %
88 %
3% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

92 %
53% significantly better gaming score
60 %

Multitasking Score

Performance in workloads using up to 8 cores

83 %
98 %
18% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

83 %
103 %
24% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Core i9-7900X and the Core i9-7940X? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Multi threaded benchmark

9,923
12,840
29% slightly higher Geekbench (multi) score

Geekbench (single) score

Single threaded benchmark

1,104
1,119
1% slightly higher Geekbench (single) score

Specifications

Cores

Number of physical processing units

10
14
40% slightly more cores

Threads

Number of logical processing units

20
28
40% slightly more threads

Clock Speed

Base frequency at which the chip operates

3 GHz
6% slightly higher clock speed
3 GHz

Turbo Speed

Higher frequency used for heavy workloads

4 GHz
Identical
4 GHz

TDP

Thermal Design Power: Measure of heat generated by the CPU

140 W
17% slightly lower TDP
165 W

PCIe Lanes

Number of physical connections between the CPU and expansion slots

44
Identical
44

Memory Channels

Lanes for simultaneous memory access

4
Identical
4

Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB
Identical
128 GiB

L1 Cache

Smallest embedded memory, but the fastest

640 KiB
896 KiB
40% slightly more L1 cache

L3 Cache

General memory pool for all cores

14 MiB
25 MiB
78% significantly more L3 cache

Other details

Rank

Ranking in the hardwareDB database

98th of 1,335
85th of 1,335

Family

The product line

Core X-series
Core X-series

Release date

The official date of release of this chip

May 2017
August 2017

Memory Type

The type of memory used by this chip

DDR4-2666
DDR4-2666

Is Unlocked

Can this CPU can be overclocked

Yes
Yes

Supports ECC memory

Does this CPU support error correcting memory

No
No

Core i9-7900X vs Core i9-7940X specs and performance

According to the hardwareDB Benchmark tool, the Core i9-7940X is faster than the Core i9-7900X. Despite this, the Core i9-7900X has the advantage in our gaming benchmark.

When comparing core counts for these CPUs, we notice that the Core i9-7940X has slightly more cores with 14 cores compared to the Core i9-7900X that has 10 cores. It also has more threads than the Core i9-7900X. These CPUs have different clock speeds. Indeed, the Core i9-7900X has a slightly higher clock speed compared to the Core i9-7940X. Furthermore, both these CPUs have identical turbo speeds. A Core i9-7900X CPU outputs less heat than a Core i9-7940X CPU because of its slightly 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 i9-7900X has more threads than cores. Each physical core is split into multiple threads.

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