Intel Core i7-9800X vs Intel Core i5-8400

Intel Core i7-9800X
Intel Socket 2066DESKTOP
3800 MHz / Cores: 8 / Oct 2018
Intel Core i7-9800X

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

Summary

Synthetic performance index

  • Intel Core i7-9800X
    143%
  • Intel Core i5-8400
    100%

Relative performance

Single thread performance index

  • Intel Core i7-9800X
    109%
  • Intel Core i5-8400
    100%

Relative performance

Multi thread performance index

  • Intel Core i7-9800X
    178%
  • Intel Core i5-8400
    100%

Relative performance

Reasons to consider Intel Core i7-9800X

9% higher single threaded performance.
Much higher multi threaded performance (around 78% higher). This allows for higher performance in professional applications like encoding or heavy multitasking.
Around 43% higher average synthetic performance.

Reasons to consider Intel Core i5-8400

100 watts lower power draw.
Has an integrated GPU, which allows to run the system without a dedicated graphics card, unlike the Intel Core i7-9800X.

Intel Core i7-9800X

Gaming

HWBench recommends Intel Core i7-9800X

Based on game and synthetic benchmarks, and theoretical specifications.

Intel Core i7-9800X

Productivity

HWBench recommends Intel Core i7-9800X

Based on productivity benchmarks, overall multithreaded performance and theoretical specifications.


Specifications

Features

Intel Core i7-9800XIntel Core i5-8400
MMX
SSE
SSE2
SSE3
SSSE3
SSE4.2
AVX
AVX2
EIST
Intel 64
XD bit
VT-x
VT-d
HTT
AES-NI
TSX
TXT
CLMUL
FMA3
F16C
BMI1
BMI2
Boost 2.0
Boost 3.0

Architecture

Intel Core i7-9800XIntel Core i5-8400
ArchitectureIntel_SkylakevsIntel_Coffelake
MarketDesktopvsDesktop
Memory SupportDDR4vsDDR4
CodenameSkylake-XvsCoffee Lake
Release DateOct 2018vsJan 2018

Cores

Intel Core i7-9800XIntel Core i5-8400
Cores8vs6
Threads16vs6
SMPs1vs1
Integrated GraphicsNovsIntel UHD 630

Cache

Intel Core i7-9800XIntel Core i5-8400
L1 Cache64K (per core)vs64 KB (per core)
L2 Cache1MB (per core)vs256 KB (per core)
L3 Cache16.5MB (shared)vs9216 KB (shared)

Physical

Intel Core i7-9800XIntel Core i5-8400
SocketIntel Socket 2066vsIntel Socket 1151
Max Case Temp72°Cvs72°C
PackageFC-LGA2066vsFC-LGA1151
Die Sizeunknownvs151mm²
Process14 nmvs14 nm

Performance

Intel Core i7-9800XIntel Core i5-8400
Cpu Frequency3800 MHzvs2800 MHz
Turbo Clock Speed4400 MHzvs4000 MHz
Base Clock100 MHzvs100 MHz
Voltageunknownvsunknown
TDP165 Wvs65 W

Raw performance index

Raw single-thread performance estimation

  • Intel Core i7-9800X
    5060 points
  • Intel Core i5-8400
    4800 points

Points - higher is better

Raw multi-thread performance estimation

  • Intel Core i7-9800X
    42301 points
  • Intel Core i5-8400
    20160 points

Points - higher is better

Synthetic benchmarks

Cinebench R15 CPU Single 64Bit

  • Intel Core i7-9800X (simulated)
    185.95
  • Intel Core i5-8400
    170

points - higher is better

Cinebench R15 CPU Multi 64Bit

  • Intel Core i7-9800X (simulated)
    1672
  • Intel Core i5-8400
    939

points - higher is better