The Core i5-8400 is a slightly slower gaming CPU than the Core i9-7940X, however, it's a much better value for money, as it's $180.00 cheaper!
Advantages of the Core i5-8400
- Up to 60% cheaper – $120.00 vs $300.00
- A much better value for money for gaming
- Consumes up to 61% less energy – 65 vs 165 Watts
- Can run games without a dedicated GPU as it has integrated graphics
Advantages of the Core i9-7940X
- A slightly faster CPU for gaming
- Can execute more multi-threaded tasks simultaneously – 28 vs 6 threads
Core i5-8400 vs Core i9-7940X for Gaming
The CPU's performance in selected game and settings
Core i5-8400
Oct 5th, 2017
Average FPS
205
100%
Min 1% FPS
142
99%
Price, $
$120
100%
Value, $/FPS
$0.58/FPS
100%
Core i9-7940X
Sep 1st, 2017
Average FPS
205
100%
Min 1% FPS
143
100%
Price, $
$300
40%
Value, $/FPS
$1.46/FPS
40%
Core i5-8400 vs Core i9-7940X in My Games
The FPS you'll get in saved games, click on a game to change it
The FPS you'll get in saved games, click on a game to change it
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Synthetic Benchmarks
The Core i5-8400 vs Core i9-7940X in synthetic CPU benchmarks
Performance Specifications
The Core i5-8400 vs Core i9-7940X in core CPU performance specifications
Core i5-8400
Oct 5th, 2017
Cores
6-core
43%
L3 Cache
9 MB
47%
Base Frequency
2.8 GHz
90%
Turbo Frequency
4 GHz
91%
Max. DDR4 RAM Speed
2666 MHz
100%
Core i9-7940X
Sep 1st, 2017
Cores
14-core
100%
L3 Cache
19.25 MB
100%
Base Frequency
3.1 GHz
100%
Turbo Frequency
4.4 GHz
100%
Max. DDR4 RAM Speed
2666 MHz
100%
Specifications
Comparison of all specifications
Core i5-8400 | SpecificationsComparison of all specifications | Core i9-7940X |
|---|---|---|
| General | ||
Oct 5th, 2017 | Release Date | Sep 1st, 2017 |
$182.00 | MSRP | $1,399.00 |
Desktop | Segment | Desktop |
| Intel Socket 1151 | Socket | Intel Socket 2066 |
| Coffee Lake | Codename | Skylake-X |
65 W | Power Consumption | 165 W |
| Performance | ||
| 6 | Cores | 14 |
| 6 | Threads | 28 |
| 2.8 GHz | Base Frequency | 3.1 GHz |
| 4.0 GHz | Turbo Frequency | 4.4 GHz |
| 9 MB | L3 Cache | 19.25 MB |
| Other Features | ||
| DDR4 @ 2666 MHz | RAM | DDR4 @ 2666 MHz |
UHD Graphics 630 | Integrated Graphics | No |
| No | Overclockable | Yes |
