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Intel Celeron J4125 vs Intel Core i5-8400

Last updated: 2026-06-06

Table of Contents

Summary
Benchmarks
Specifications
User Reviews
Popular Comparisons

Summary

Benchmarks

Performance Overview
Average performance across multiple benchmarks

Single-core performance

Rank 2 - 38 %

Intel Celeron J4125

Rank 1 - 100 %

Intel Core i5-8400

Multi-core performance

Rank 2 - 32 %

Intel Celeron J4125

Rank 1 - 100 %

Intel Core i5-8400

Geekbench 6 Single-Core
Single-core performance

4C / 4T · 2.70 GHz

411

6C / 6T · 4.00 GHz

1,322

Geekbench 6 Multi-Core
Multi-core performance

4C / 4T · 2.70 GHz

1,276

6C / 6T · 3.80 GHz

4,814

Cinebench R20 Single-Core
Single-core performance

4C / 4T · 2.70 GHz

192 cb

6C / 6T · 4.00 GHz

411 cb

Geekbench 5, 64bit Single-Core
Single-core performance

4C / 4T · 2.70 GHz

482

6C / 6T · 4.00 GHz

1,053

Cinebench R20 Multi-Core
Multi-core performance

4C / 4T · 2.70 GHz

675 cb

6C / 6T · 3.80 GHz

2,291 cb

Geekbench 5, 64bit Multi-Core
Multi-core performance

4C / 4T · 2.70 GHz

1,632

6C / 6T · 3.80 GHz

4,608

iGPU - FP32 Performance (Single-precision GFLOPS)

Intel UHD Graphics 600

144

Intel UHD Graphics 630

442

Blender 3.1 Benchmark
Multi-core performance

4C / 4T · 2.70 GHz

6C / 6T · 3.80 GHz

CPU-Z Benchmark 17 Multi-Core
Multi-core performance

4C / 4T · 2.00 GHz

807

6C / 6T · 2.80 GHz

2,482

Cinebench R15 (Single-Core)
Single-core performance

4C / 4T · 2.70 GHz

79 cb

6C / 6T · 4.00 GHz

163 cb

Cinebench R15 (Multi-Core)
Multi-core performance

4C / 4T · 2.70 GHz

296 cb

6C / 6T · 3.80 GHz

925 cb

More benchmarks

Cinebench 2026 (ST)
218 entries

Cinebench 2026 (MC)
219 entries

Cinebench 2024 (SC)
427 entries

Cinebench 2024 (MC)
422 entries

Cinebench R23 (SC)
690 entries

Cinebench R23 (MC)
665 entries

Geekbench 6 (SC)
1,989 entries

Geekbench 6 (MC)
1,927 entries

Cinebench R20 (SC)
666 entries

Geekbench 5 (SC)
2,512 entries

Cinebench R20 (MC)
615 entries

Geekbench 5 (MC)
2,483 entries

FP32 SP (iGPU)
2,219 entries

3DMark Timespy (iGPU)
534 entries

Blender 3.1 Benchmark
213 entries

PassMark CPU-Mark
2,504 entries

Blender 2.81 (bmw27)
190 entries

CPU-Z Benchmark 17 (SC)
250 entries

CPU-Z Benchmark 17 (MC)
751 entries

V-Ray CPU-Render
251 entries

Cinebench R15 (SC)
1,113 entries

Cinebench R15 (MC)
1,110 entries

Geekbench 3 (SC)
945 entries

Geekbench 3 (MC)
941 entries

Cinebench R11.5 (SC)
826 entries

Cinebench R11.5 (MC)
837 entries

Cinebench R11.5 iGPU
383 entries

Specifications

At a glance

Wischen	Intel Celeron J4125	Intel Core i5-8400
Family	Intel Celeron (165)	Intel Core i5 (336)
CPU group	Intel Celeron J4000/N4000/N5000 (11)	Intel Core i 8000 (20)
Architecture	Gemini Lake	Coffee Lake S
Technology	14 nm	14 nm
Segment	Notebook	Desktop
Socket	BGA 1090	LGA 1151-2
Predecessor		Intel Core i5-7400
Successor		Intel Core i5-9400

CPU Cores and Base Frequency

Wischen	Intel Celeron J4125	Intel Core i5-8400
CPU Cores / Threads	4 / 4	6 / 6
Hyperthreading / SMT	✗	✗
Core architecture	normal	normal
Cores:	4x	6x
Frequency:	2.00 GHz	2.80 GHz
Turbo (1 Core):	2.70 GHz	4.00 GHz
Turbo (All Cores):	2.70 GHz	3.80 GHz
L2-Cache
L3-Cache	4.00 MB	9.00 MB
Overclocking	✗	✗

Integrated graphics (iGPU)

Wischen	Intel Celeron J4125	Intel Core i5-8400
GPU name	Intel UHD Graphics 600	Intel UHD Graphics 630
GPU frequency	0.25 - 0.75 GHz	0.35 - 1.15 GHz
CUs / Shader	12 / 96	24 / 192
Raytracing	✗	✗
Max. displays	3	3
Max. GPU Memory	8 GB	64 GB
Technology	14 nm	14 nm
Release date	Q4/2017	Q4/2017

NPU AI performance

Wischen	Intel Celeron J4125	Intel Core i5-8400
AI hardware
AI specifications
NPU + CPU + iGPU

Memory & PCIe

Wischen	Intel Celeron J4125	Intel Core i5-8400
Memory	DDR4-2400 (38.4 GB/s)	DDR4-2666 (42.7 GB/s)
Max. Memory	8 GB	128 GB
Memory channels	2	2
ECC	No	No
PCIe	2.0 x 6	3.0 x 16
PCIe Bandwidth	3.0 GB/s	15.8 GB/s

Thermal Management

Wischen	Intel Celeron J4125	Intel Core i5-8400
TDP	10 W	65 W
TDP (PL2)
TDP up
TDP down
T. junction max.	105 °C

Technical details

Wischen	Intel Celeron J4125	Intel Core i5-8400
Chip design	Monolithic	Monolithic
AES-NI	✓	✓
Operating systems	Windows 10, Windows 11, Linux	Windows 10, Windows 11, Linux
Instruction set	x86-64 (64 bit)	x86-64 (64 bit)
ISA extensions	SSE4.1, SSE4.2	SSE4.1, SSE4.2, AVX2
Release date	Q4/2019	Q4/2017
Release price		260 $
Documents	Technical data sheet	Technical data sheet

User Reviews

Your rating

Here you can rate one or both of the processors. The average rating of Intel Celeron J4125 is 4.0 stars (81 ratings), while Intel Core i5-8400 has received 4.1 stars (74 ratings).

Click on the stars to rate one or both processors.

Intel Celeron J4125
4C / 4T · 2.00 - 2.70 GHz

★★★★★

Intel Core i5-8400
6C / 6T · 2.80 - 4.00 GHz

★★★★★