Intel Core i5-8600K vs Intel Core i7-7740X

Compare Intel 8th Generation Core i5 6 core CPU vs Intel Core X-series 4 core processor, specs and benchmark score. Which is the better CPU for gaming?

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The cheapest price from our partner retailers

$ 275
$ 208
$ 67.33 significantly less expensive

Benchmark Score

Overall Score

A combined score of all workloads

50 %
50 %

Gaming Score

The raw gaming performance with a fast GPU

79 %
14% slightly better gaming score
69 %

Multitasking Score

Performance in workloads using up to 8 cores

41 %
44 %
7% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

40 %
42 %
5% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Core i5-8600K and the Core i7-7740X? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Multi threaded benchmark

11% slightly higher Geekbench (multi) score

Geekbench (single) score

Single threaded benchmark

5% slightly higher Geekbench (single) score



Number of physical processing units

49% significantly more cores


Number of logical processing units

33% slightly more threads

Clock Speed

Base frequency at which the chip operates

4 GHz
4 GHz
19% slightly higher clock speed

Turbo Speed

Higher frequency used for heavy workloads

4 GHz
5 GHz
4% slightly higher turbo speed


Thermal Design Power: Measure of heat generated by the CPU

95 W
17% slightly lower TDP
112 W

PCIe Lanes

Number of physical connections between the CPU and expansion slots


Memory Channels

Lanes for simultaneous memory access


Supported Memory

Maximum amount of RAM supported by this CPU

128 GiB
100% significantly more supported memory
64 GiB

L1 Cache

Smallest embedded memory, but the fastest

384 KiB
49% significantly more L1 cache
256 KiB

L2 Cache

Secondary embedded memory, slower than L1 cache

2 MiB
49% significantly more L2 cache
1 MiB

L3 Cache

General memory pool for all cores

9 MiB
12% slightly more L3 cache
8 MiB

Other details


Ranking in the hardwareDB database

330th of 1,337
332nd of 1,337


The product line

8th Generation Core i5
Core X-series

Release date

The official date of release of this chip

November 2017
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 i5-8600K vs Core i7-7740X specs and performance

In our benchmarks, the Core i5-8600K beats the Core i7-7740X in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i7-7740X in all gaming tests too.

With info from our database, we find that the Core i5-8600K has significantly more cores with 6 cores whereas the Core i7-7740X has 4 cores. Despite this, the Core i7-7740X has more threads than the Core i5-8600K. These CPUs have different clock speeds. Indeed, the Core i7-7740X has a slightly higher clock speed compared to the Core i5-8600K. Also, the Core i7-7740X has a slightly higher turbo speed. A Core i5-8600K CPU outputs less heat than a Core i7-7740X CPU because of its slightly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. The cache sizes of these CPUs are different. Indeed, the Core i5-8600K has significantly more L2 cache than the Core i7-7740X. The Core i5-8600K also has slightly more L3 cache.

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. For instance, the Core i5-8600K has the same number of threads as cores. This means the the CPU does not support hyperthreading.


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