The Core i7-9800X is a slightly faster gaming CPU than the Core i5-8400, however, it's a much worse value for money, as it's $40.49 more expensive!
Advantages of the Core i7-9800X
- A slightly faster CPU for gaming
- Can execute more multi-threaded tasks simultaneously – 16 vs 6 threads
Advantages of the Core i5-8400
- Up to 35% cheaper – $76.58 vs $117.07
- A better value for money for gaming
- Consumes up to 61% less energy – 65 vs 165 Watts
- Has an integrated GPU, while the Core i7-9800X cannot run games without a dedicated GPU
Core i7-9800X vs Core i5-8400 for Gaming
The CPU's performance in selected game and settings
Core i7-9800X
Oct 19th, 2018
Average FPS
186
100%
Min 1% FPS
123
100%
Price, €
€117.07
65%
Value, €/FPS
€0.62/FPS
66%
Core i5-8400
Oct 5th, 2017
Average FPS
185
99%
Min 1% FPS
123
100%
Price, €
€76.58
100%
Value, €/FPS
€0.41/FPS
100%
Core i7-9800X vs Core i5-8400 in My Games
The FPS you'll get in saved games
The FPS you'll get in saved games
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Synthetic Benchmarks
The Core i7-9800X vs Core i5-8400 in synthetic CPU benchmarks
Performance Specifications
The Core i7-9800X vs Core i5-8400 in core CPU performance specifications
Core i7-9800X
Oct 19th, 2018
Cores
8-core
100%
L3 Cache
16.5 MB
100%
Base Frequency
3.8 GHz
100%
Turbo Frequency
4.4 GHz
100%
Max. DDR4 RAM Speed
2666 MHz
100%
Core i5-8400
Oct 5th, 2017
Cores
6-core
75%
L3 Cache
9 MB
55%
Base Frequency
2.8 GHz
74%
Turbo Frequency
4 GHz
91%
Max. DDR4 RAM Speed
2666 MHz
100%
Specifications
Comparison of all specifications
Core i7-9800X | SpecificationsComparison of all specifications | Core i5-8400 |
---|---|---|
General | ||
Oct 19th, 2018 | Release Date | Oct 5th, 2017 |
$589.00 | MSRP | $182.00 |
Desktop | Segment | Desktop |
Intel Socket 2066 | Socket | Intel Socket 1151 |
Skylake | Codename | Coffee Lake |
165 W | Power Consumption | 65 W |
Performance | ||
8 | Cores | 6 |
16 | Threads | 6 |
3.8 GHz | Base Frequency | 2.8 GHz |
4.4 GHz | Turbo Frequency | 4.0 GHz |
16.5 MB | L3 Cache | 9 MB |
Other Features | ||
DDR4 @ 2666 MHz | RAM | DDR4 @ 2666 MHz |
No | Integrated Graphics | UHD Graphics 630 |
Yes | Overclockable | No |