Intel Core i5-6400 vs Intel Core i7-7700K

Compare Intel 6th Generation Core i5 4 core CPU vs Intel 7th Generation Core i7 4 core processor, specs and benchmark score. Which is the better CPU for gaming?

Benchmark Score
Other Benchmarks
Specifications
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Intel Core i7-7700K

Price

The cheapest price from our partner retailers

$ 99.99

$ 85.01 significantly less expensive

$ 185.00

Benchmark Score

Overall Score

A combined score of all workloads

2127 points

3620 points

70% significantly better overall score

Gaming Score

The raw gaming performance with a fast GPU

3959 points

5762 points

45% significantly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

1617 points

2983 points

84% significantly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

1551 points

2864 points

84% significantly better heavy workload score

Free CPU Benchmark

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Other Benchmarks

3DMark Physics score

Physics simulation benchmark

2971 points

3473 points

16% slightly higher 3DMark Physics score

Blender score

Cycles Render (Samples per minute)

39.92 points

85.21 points

113% significantly higher Blender score

Geekbench 5 (multi) score

Multi threaded benchmark

2948 points

5070 points

71% significantly higher Geekbench 5 (multi) score

Geekbench 5 (single) score

Single threaded benchmark

1079 points

1524 points

41% slightly higher Geekbench 5 (single) score

Geekbench 6 (multi) score

Multi threaded benchmark

3046 points

5174 points

69% significantly higher Geekbench 6 (multi) score

Geekbench 6 (single) score

Single threaded benchmark

1116 points

1596 points

43% significantly higher Geekbench 6 (single) score

Specifications

Cores

Number of physical processing units

Identical

Threads

Number of logical processing units

100% significantly more threads

Clock Speed

Base frequency at which the chip operates

2.7 GHz

4.2 GHz

55% significantly higher clock speed

Turbo Speed

Higher frequency used for heavy workloads

3.3 GHz

4.5 GHz

36% slightly higher turbo speed

TDP

Thermal Design Power: Measure of heat generated by the CPU

65 W

46% significantly lower TDP

95 W

PCIe Lanes

Number of physical connections between the CPU and expansion slots

Identical

Memory Channels

Lanes for simultaneous memory access

Identical

Supported Memory

Maximum amount of RAM supported by this CPU

64 GiB

Identical

64 GiB

L1 Cache

Smallest embedded memory, but the fastest

256 KiB

Identical

256 KiB

L2 Cache

Secondary embedded memory, slower than L1 cache

1 MiB

Identical

1 MiB

L3 Cache

General memory pool for all cores

6 MiB

8 MiB

33% slightly more L3 cache

Other details

Rank

Ranking in the hardwareDB database

699th of 1,089

471st of 1,089

Family

The product line

6th Generation Core i5

7th Generation Core i7

Release date

The official date of release of this chip

2015 August

2017 February

Memory Type

The type of memory used by this chip

DDR4-1866

DDR4-2133

Is Unlocked

Can this CPU can be overclocked

Yes

Supports ECC memory

Does this CPU support error correcting memory

Core i5-6400 vs Core i7-7700K comparison

According to the hardwareDB Benchmark tool, the Core i7-7700K is faster than the Core i5-6400. Furthermore, our gaming benchmark shows that it also outperforms the Core i5-6400 in all gaming tests too.

Info from our database shows that they both have the same core count but the Core i7-7700K has more threads. With our hardware info, we find that the Core i7-7700K has a significantly higher clock speed than the Core i5-6400. Also, the Core i7-7700K has a slightly higher turbo speed. A Core i5-6400 CPU outputs less heat than a Core i7-7700K CPU because of its significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. The data shows that both these CPUs have same sized L2 caches. The Core i7-7700K 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 i5-6400 has the same number of threads as cores. This means the the CPU does not support hyperthreading.