Intel Core i5-8400 vs Intel Core i7-7740X

Intel Core i5-8400
Intel Socket 1151DESKTOP
2800 MHz / Cores: 6 / Jan 2018
Intel Core i5-8400
Intel Core i7-7740X
Intel Socket 2066DESKTOP
4300 MHz / Cores: 4 / Jun 2017
Intel Core i7-7740X

Summary

Synthetic performance index

  • Intel Core i5-8400
    100%
  • Intel Core i7-7740X
    118%

Relative performance

Single thread performance index

  • Intel Core i5-8400
    100%
  • Intel Core i7-7740X
    126%

Relative performance

Multi thread performance index

  • Intel Core i5-8400
    100%
  • Intel Core i7-7740X
    111%

Relative performance

Reasons to consider Intel Core i5-8400

47 watts lower power draw.
Has an integrated GPU, which allows to run the system without a dedicated graphics card, unlike the Intel Core i7-7740X.

Reasons to consider Intel Core i7-7740X

Much higher single threaded performance (around 26% higher), makes a noticeable performance difference in gaming and the majority of applications.
11% higher multi threaded performance.
Around 18% higher average synthetic performance.

Intel Core i7-7740X

Gaming

HWBench recommends Intel Core i7-7740X

Based on game and synthetic benchmarks, and theoretical specifications.

No winner

Productivity

No clear winner declared



Specifications

Features

Intel Core i5-8400Intel Core i7-7740X
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 i7-7740X
ArchitectureIntel_CoffelakevsIntel_Kabylake
MarketDesktopvsDesktop
Memory SupportDDR4vsDDR4
CodenameCoffee LakevsKaby Lake-X
Release DateJan 2018vsJun 2017

Cores

Intel Core i5-8400Intel Core i7-7740X
Cores6vs4
Threads6vs8
SMPs1vs1
Integrated GraphicsIntel UHD 630vsNo

Cache

Intel Core i5-8400Intel Core i7-7740X
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 i7-7740X
SocketIntel Socket 1151vsIntel Socket 2066
Max Case Temp72°Cvs72°C
PackageFC-LGA1151vsFC-LGA2066
Die Size151mm²vs308mm²
Process14 nmvs14 nm

Performance

Intel Core i5-8400Intel Core i7-7740X
Cpu Frequency2800 MHzvs4300 MHz
Turbo Clock4000 MHzvs4600 MHz
Base Clock100 MHzvs100 MHz
Voltageunknownvsunknown
TDP65 Wvs112 W

Raw performance index

Raw single-thread performance estimation

  • Intel Core i5-8400
    4800 points
  • Intel Core i7-7740X
    5520 points

Points - higher is better

Raw multi-thread performance estimation

  • Intel Core i5-8400
    20160 points
  • Intel Core i7-7740X
    24768 points

Points - higher is better

Synthetic benchmarks

Cinebench R15 CPU Multi 64Bit

  • Intel Core i5-8400
    939
  • Intel Core i7-7740X (simulated)
    1047.53

points - higher is better

Cinebench R15 CPU Single 64Bit

  • Intel Core i5-8400
    170
  • Intel Core i7-7740X (simulated)
    214.67

points - higher is better