Home > CPU Comparison > Core i7 9750H or Core i5 8400: what's better?

Intel Core i7 9750H vs i5 8400

32 out of 100
Intel Core i7 9750H
VS
31 out of 100
Intel Core i5 8400
Intel Core i7 9750H
Intel Core i5 8400

We compared two 6-core CPUs: the 2.6 GHz Intel Core i7 9750H (laptop) against the 2.8 GHz i5 8400 (desktop). On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.

  1. Review
  2. Differences
  3. Performance
  4. Specs
  5. Comments

Review

General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Multi-Core Performance
Measure performance when all cores are involved
Power Efficiency
The efficiency score of power consumption
Integrated Graphics
iGPU capabilities for gaming and 3D-intensive tasks
The "iGPU" and "Power Efficiency" have a minor impact on the NanoReview Score for desktop CPU.
NanoReview Final Score
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
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Value for money (Beta)

Global average CPU prices are used by default! For better accuracy, enter your current prices and click “Calculate".
Currency
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Key Differences

What are the key differences between 8400 and 9750H
Advantages of Intel Core i7 9750H
  • Has 3 MB larger L3 cache size
  • Newer - released 1 year and 7 months later
  • 13% higher Turbo Boost frequency (4.5 GHz vs 4 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Core i7 9750H
vs
Core i5 8400

Cinebench

Reputable cross-platform benchmark for high-performance processors
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
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)
Core i7 9750H
1332
Core i5 8400 +6%
1414
Geekbench 6 (Multi-Core)
Core i7 9750H +9%
5548
Core i5 8400
5082
File compression 440.6 MB/sec 392.9 MB/sec
Clang compilation 43 Klines/sec 36 Klines/sec
HTML 5 Browser 122.2 pages/sec 115 pages/sec
PDF Renderer 162.6 Mpixels/sec 156.8 Mpixels/sec
Text processing 129.2 pages/sec 139 pages/sec
Background blur 30.2 images/sec 33.8 images/sec
Photo processing 48.3 images/sec 49.9 images/sec
Ray tracing 10.4 Mpixels/sec 5.93 Mpixels/sec
Sources: GeekBench [1], [2] – 887 & 1184 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Core i7 9750H +1%
2389
Core i5 8400
2366
Passmark CPU (Multi-Core)
Core i7 9750H +15%
10579
Core i5 8400
9232
Integer math 37.6 GOps/sec 25.6 GOps/sec
Floating point math 23.2 GOps/sec 22 GOps/sec
Find prime numbers 32M Primes/sec 37M Primes/sec
Random string sorting 19.7M Strings/sec 15.9M Strings/sec
Data encryption 3.7 GBytes/sec 2.8 GBytes/sec
Data compression 148.5 MBytes/sec 129.6 MBytes/sec
Physics 666 Frames/sec 634 Frames/sec
Extended instructions 9.1B Matrices/sec 11.5B Matrices/sec
Sources: PassMark [3], [4] – 14759 & 9637 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU
Core i7 9750H +13%
87.76
Core i5 8400
77.38

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 7.5 PPW 4.8 PPW
Geekbench 6 Multi / Watt 123.3 PPW 78.2 PPW
Passmark CPU Mark / Watt 235.1 PPW 142 PPW
Blender / Watt 1.95 PPW 1.19 PPW
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.

Recent User Tests

The latest benchmark tests that have been submitted by users
Intel Core i7 9750H
DateBenchmarkResult
📘 2025-08-19 (ysh)Cinebench 202467 / 423
📘 2025-08-12 (Yus)GeekBench1566 / 6117
📘 2025-08-10 (Yus)GeekBench1475 / 5676
📘 2025-05-15 (Star)Cinebench 202457 / 332
📘 2024-11-03 (skoda)Cinebench 202466 / 338
Add View all (5)
Intel Core i5 8400
No benchmark results yet
Add

Specifications

Full technical specification of Intel Core i7 9750H and i5 8400

General

Vendor Intel Intel
Released April 23, 2019 October 5, 2017
Type Laptop Desktop
Instruction Set x86-64 x86-64
Codename Coffee Lake Coffee Lake
Model number i7-9750H i5-8400
Integrated GPU UHD Graphics 630 UHD Graphics 630
Rival Equivalent - - AMD Ryzen 5 2400G
Successor - Intel Core i7 10750H - Intel Core Ultra 5 225

CPU

Performance Cores
P-Cores 6 6
P-Threads 12 6
Base Frequency (P) 2.6 GHz 2.8 GHz
Turbo Boost Frequency (P) 4.5 GHz 4 GHz
Total
Total Cores 6 6
Total Threads 12 6
Bus Frequency 100 MHz 100 MHz
Multiplier 26x 28x
Bus Bandwidth 8 GT/s 8 GT/s
L1 Cache 32K (per core) 64K (per core)
L2 Cache 256K (per core) 256K (per core)
L3 Cache 12MB (shared) 9MB (shared)
Unlocked Multiplier No No

Package

Fabrication Process 14 nm 14 nm
TDP (PL1) 45 W 65 W
Socket BGA-1440 LGA-1151
Peak Temperature 100°C 100°C
Desktop CPU ranking (#181st place)

iGPU

Integrated Graphics Intel UHD Graphics 630 Intel UHD Graphics 630
GPU Base Clock 350 MHz 350 MHz
GPU Boost Clock 1150 MHz 1050 MHz
Shading Units 192 192
TMUs 24 24
ROPs 3 3
Execution Units 24 24
TGP 15 W 15 W
iGPU FLOPS
Core i7 9750H
0.4 TFLOPS
Core i5 8400
0.4 TFLOPS
See: Intel UHD Graphics 630 benchmarks

Memory Support

Memory Types - DDR4-2666
- LPDDR3-2133		 - DDR4-2666
Max. Memory Size 128 GB 128 GB
Memory Channels 2 2
Max. Memory Bandwidth 41.8 GB/s 41.6 GB/s
ECC Support No No

Misc

Official Site Intel Core i7 9750H official page Intel Core i5 8400 official page
PCI Express Version 3.0 3.0
PCI Express Lanes 16 16

Cast your vote

Choose between two processors
8 (72.7%)
3 (27.3%)
Total votes: 11

Competitors

1. Intel Core i7 9750H vs Apple M2
2. Intel Core i7 9750H vs Apple M1
3. Intel Core i7 9750H vs Apple M1 Pro
Compare other CPUs (460+)

Comments

So which CPU will you choose: Intel Core i5 8400 or i7 9750H?
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