Intel Core i5-8400 vs Intel Core i7-7700K

Intel Core i5-8400
Intel Socket 1151DESKTOP
2800 MHz / Cores: 6 / Jan 2018
Intel Core i5-8400

Intel Core i7-7700K
Intel Socket 1151DESKTOP
4200 MHz / Cores: 4 / Sep 2016
Intel Core i7-7700K

Summary

Synthetic performance index

  • Intel Core i5-8400
    100%
  • Intel Core i7-7700K
    109%

Relative performance

Single thread performance index

  • Intel Core i5-8400
    100%
  • Intel Core i7-7700K
    115%

Relative performance

Multi thread performance index

  • Intel Core i5-8400
    100%
  • Intel Core i7-7700K
    103%

Relative performance

Reasons to consider Intel Core i5-8400

This is a newer product, it might have better application compatibility/performance (check features chart below).

Reasons to consider Intel Core i7-7700K

15% higher single threaded performance.
Has an integrated GPU, which allows to run the system without a dedicated graphics card, unlike the Intel Core i5-8400.
Around 9% higher average synthetic performance.

Intel Core i7-7700K

Gaming

HWBench recommends Intel Core i7-7700K

Based on game and synthetic benchmarks, and theoretical specifications.

No winner

Productivity

No clear winner declared




Specifications

Features

Intel Core i5-8400Intel Core i7-7700K
MMX
SSE
SSE2
SSE3
SSSE3
SSE4.2
AVX
AVX2
EIST
Intel 64
XD bit
VT-x
VT-d
AES-NI
TSX
TXT
CLMUL
FMA3
F16C
BMI1
BMI2
Boost 2.0
HTT

Architecture

Intel Core i5-8400Intel Core i7-7700K
ArchitectureIntel_CoffeeLakevsIntel_Kabylake
MarketDesktopvsDesktop
Memory SupportDDR4vsDDR4
CodenameCoffee LakevsKaby Lake
Release DateJan 2018vsSep 2016

Cores

Intel Core i5-8400Intel Core i7-7700K
Cores6vs4
Threads6vs8
SMPs1vs1
Integrated GraphicsNovsHD Graphics

Cache

Intel Core i5-8400Intel Core i7-7700K
L1 Cache64 KB (per core)vs64 KB (per core)
L2 Cache256 KB (per core)vs256 KB (per core)
L3 Cache9216 KB (shared)vs8192 KB (shared)

Physical

Intel Core i5-8400Intel Core i7-7700K
SocketIntel Socket 1151vsIntel Socket 1151
Max Case Temp72°Cvs72°C
PackageFC-LGA1151vs
Die Size151 mm²vs0 mm²
Process14 nmvs14 nm

Performance

Intel Core i5-8400Intel Core i7-7700K
Cpu Frequency2800 MHzvs4200 MHz
Turbo Clock Speed4000 MHzvs4500 MHz
Base Clock100 MHzvs100 MHz
Voltageunknownvsunknown
TDP65 Wvs95 W

Raw performance index

Raw single-thread performance estimation

  • Intel Core i5-8400
    4600 points
  • Intel Core i7-7700K
    5400 points

Points - higher is better

Raw multi-thread performance estimation

  • Intel Core i5-8400
    19320 points
  • Intel Core i7-7700K
    24192 points

Points - higher is better


Synthetic benchmarks

Cinebench R15 CPU Multi 64Bit

  • Intel Core i5-8400
    939
  • Intel Core i7-7700K
    972

points - higher is better

Cinebench R15 CPU Single 64Bit

  • Intel Core i5-8400
    170
  • Intel Core i7-7700K
    196

points - higher is better