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Intel Core i5-8400 vs Intel Core Ultra 7 265

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 - 48 %

Intel Core i5-8400

Rank 1 - 100 %

Intel Core Ultra 7 265

Multi-core performance

Rank 2 - 20 %

Intel Core i5-8400

Rank 1 - 100 %

Intel Core Ultra 7 265

Cinebench 2024 Single-Core
Single-core performance

6C / 6T · 4.00 GHz

62 pts

20C / 20T · 5.30 GHz

136 pts

Cinebench 2024 Multi-Core
Multi-core performance

6C / 6T · 4.00 GHz

283 pts

20C / 20T · 5.30 GHz

1,409 pts

Geekbench 6 Single-Core
Single-core performance

6C / 6T · 4.00 GHz

1,322

20C / 20T · 5.30 GHz

3,115

Geekbench 6 Multi-Core
Multi-core performance

6C / 6T · 3.80 GHz

4,814

20C / 20T · 5.10 GHz

20,735

Cinebench R20 Single-Core
Single-core performance

6C / 6T · 4.00 GHz

411 cb

20C / 20T · 5.30 GHz

847 cb

Cinebench R20 Multi-Core
Multi-core performance

6C / 6T · 3.80 GHz

2,291 cb

20C / 20T · 5.10 GHz

10,181 cb

iGPU - FP32 Performance (Single-precision GFLOPS)

Intel UHD Graphics 630

442

Intel Xe 4 Core Graphics 64 EUs (Arrow Lake)

1,940

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

6C / 6T · 4.00 GHz

450

20C / 20T · 5.30 GHz

805

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

6C / 6T · 2.80 GHz

2,482

20C / 20T · 2.40 GHz

14,451

Cinebench R15 (Single-Core)
Single-core performance

6C / 6T · 4.00 GHz

163 cb

20C / 20T · 5.30 GHz

329 cb

Cinebench R15 (Multi-Core)
Multi-core performance

6C / 6T · 3.80 GHz

925 cb

20C / 20T · 5.10 GHz

4,830 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

AI performance (NPU)
218 entries

Specifications

At a glance

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
Family	Intel Core i5 (336)	Intel Core Ultra 7 (31)
CPU group	Intel Core i 8000 (20)	Intel Core Ultra 200 AL-S (20)
Architecture	Coffee Lake S	Arrow Lake
Technology	14 nm	3 nm
Segment	Desktop	Desktop
Socket	LGA 1151-2	LGA 1851
Predecessor	Intel Core i5-7400
Successor	Intel Core i5-9400

CPU Cores and Base Frequency

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
CPU Cores / Threads	6 / 6	20 / 20
Hyperthreading / SMT	✗	✗
Core architecture	normal	hybrid (big.LITTLE)
Core Cluster 1:	6x 2.80 - 4.00 GHz	8x Lion Cove 2.40 - 5.30 GHz
Core Cluster 2:		12x Skymont 1.80 - 4.60 GHz
L2-Cache		36.00 MB
L3-Cache	9.00 MB	33.00 MB
Overclocking	✗	✓

Integrated graphics (iGPU)

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
GPU name	Intel UHD Graphics 630	Intel Xe 4 Core Graphics 64 EUs (Arrow Lake)
GPU frequency	0.35 - 1.15 GHz	0.30 - 1.95 GHz
CUs / Shader	24 / 192	4 / 512
Raytracing	✗	✓
Max. displays	3	3
Max. GPU Memory	64 GB	32 GB
Technology	14 nm	5 nm
Release date	Q4/2017	Q3/2024

NPU AI performance

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
AI hardware		Intel® AI Boost
AI specifications		Intel AI Boost NPU 4 @ 13 TOPS
NPU + CPU + iGPU		37 TOPS

Memory & PCIe

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
Memory	DDR4-2666 (42.7 GB/s)	DDR5-6400 (102.4 GB/s)
Max. Memory	128 GB	256 GB
Memory channels	2	2
ECC	No	Yes
PCIe	3.0 x 16	5.0 x 20
PCIe Bandwidth	15.8 GB/s	78.8 GB/s

Thermal Management

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
TDP	65 W	65 W
TDP (PL2)		182 W
TDP up
TDP down
T. junction max.		105 °C

Technical details

Wischen	Intel Core i5-8400	Intel Core Ultra 7 265
Chip design	Monolithic	Monolithic
AES-NI	✓	✓
Operating systems	Windows 10, Windows 11, Linux	Windows 11, Linux
Instruction set	x86-64 (64 bit)	x86-64 (64 bit)
ISA extensions	SSE4.1, SSE4.2, AVX2	SSE4.1, SSE4.2, AVX2
Release date	Q4/2017	Q1/2025
Release price	260 $	384 $
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 Core i5-8400 is 4.1 stars (74 ratings), while Intel Core Ultra 7 265 has received 2.8 stars (106 ratings).

Click on the stars to rate one or both processors.

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

★★★★★

Intel Core Ultra 7 265
20C / 20T · 2.40 - 5.30 GHz

★★★★★