Intel Core i5 8400

Cores: 6
L3 cache: 9MB (shared)
TDP: 65 W
Transistor size: 14 nm

Core i5 8400 - desktop processor produced by Intel for socket LGA-1151 that has 6 cores and 6 threads. The base clock frequency of the CPU is 2800 MHz, but due to Turbo Boost technology, it can perform up to 4000 MHz. The size of the L3 cache is 9 MB. Please note that this chip has integrated graphics Intel UHD Graphics 630.

Review

Single-Core Performance

40

Multi-Core Performance

15

Power Efficiency

42

Integrated Graphics

23

NanoReview Final Score

30

Compare Intel Core i5 8400 with other CPUs

Cinebench

Reputable cross-platform benchmark for high-performance processors

Cinebench 2024 (Single)

60

Cinebench 2024 (Multi)

313

Submit your benchmark results

GeekBench v6

The new version of this benchmark emulates common operations often used in real-world apps

Geekbench 6 (Single-Core)

1414

Geekbench 6 (Multi-Core)

5082

File compression	392.9 MB/sec
Clang compilation	36 Klines/sec
HTML 5 Browser	115 pages/sec
PDF Renderer	156.8 Mpixels/sec
Text processing	139 pages/sec
Background blur	33.8 images/sec
Photo processing	49.9 images/sec
Ray tracing	5.93 Mpixels/sec

Sources: GeekBench [1] – 1184 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions

Passmark CPU (Single-Core)

2366

Passmark CPU (Multi-Core)

9232

Integer math	25.6 GOps/sec
Floating point math	22 GOps/sec
Find prime numbers	37M Primes/sec
Random string sorting	15.9M Strings/sec
Data encryption	2.8 GBytes/sec
Data compression	129.6 MBytes/sec
Physics	634 Frames/sec
Extended instructions	11.5B Matrices/sec

Sources: PassMark [3] – 9637 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)

Blender CPU

77.38

Performance Per Watt

Shows the score you get per each watt of PL1 TDP

Cinebench 2024 / Watt	4.8 PPW
Geekbench 6 Multi / Watt	78.2 PPW
Passmark CPU Mark / Watt	142 PPW
Blender / Watt	1.19 PPW

These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.

General

Vendor	Intel
Released	October 5, 2017
Type	Desktop
Instruction Set	x86-64
Codename	Coffee Lake
Model number	i5-8400
Integrated GPU	UHD Graphics 630
AMD Equivalent	- AMD Ryzen 5 2400G
Successor	- Intel Core Ultra 5 225

CPU

Performance Cores
P-Cores	6
P-Threads	6
Base Frequency (P)	2.8 GHz
Turbo Boost Frequency (P)	4 GHz

Total
Total Cores	6
Total Threads	6
Bus Frequency	100 MHz
Multiplier	28x
Bus Bandwidth	8 GT/s
L1 Cache	64K (per core)
L2 Cache	256K (per core)
L3 Cache	9MB (shared)
Unlocked Multiplier	No

Package

Fabrication Process	14 nm
TDP (PL1)	65 W
Socket	LGA-1151
Peak Temperature	100°C

Desktop CPU ranking - 181st place

iGPU

Integrated Graphics	Intel UHD Graphics 630
GPU Base Clock	350 MHz
GPU Boost Clock	1050 MHz
Shading Units	192
TMUs	24
ROPs	3
Execution Units	24
TGP	15 W

iGPU FLOPS

0.4 TFLOPS

See also: Intel UHD Graphics 630 – integrated graphics of Intel Core i5 8400

Memory Support

Memory Types	- DDR4-2666
Max. Memory Size	128 GB
Memory Channels	2
Max. Memory Bandwidth	41.6 GB/s
ECC Support	No

Misc

Official Site	Intel Core i5 8400 official page
PCI Express Version	3.0
PCI Express Lanes	16
Technologies	- Compute: BMI1, BMI2, CLMUL, F16C - Performance: Boost 2.0, EIST, TSX - Virtualization: VT-d, VT-x - Security: TXT, XD bit