The Core i9-9900X is a much faster gaming CPU than the Core i5-8400T, however, it's a much worse value for money, as it's $386.62 more expensive!
Advantages of the Core i9-9900X
- A much faster CPU for gaming
- Can execute more multi-threaded tasks simultaneously – 20 vs 6 threads
Advantages of the Core i5-8400T
- Up to 77% cheaper – $113.37 vs $499.99
- A much better value for money for gaming
- Consumes up to 79% less energy – 35 vs 165 Watts
- Has an integrated GPU, while the Core i9-9900X cannot run games without a dedicated GPU
Core i9-9900X vs Core i5-8400T for Gaming
The CPU's performance in selected game and settings
Core i9-9900X
Oct 19th, 2018
Average FPS
186
100%
Min 1% FPS
124
100%
Price, $
$499.99
22%
Value, $/FPS
$2.68/FPS
23%
Core i5-8400T
Apr 2nd, 2018
Average FPS
180
97%
Min 1% FPS
120
97%
Price, $
$113.37
100%
Value, $/FPS
$0.62/FPS
100%
Core i9-9900X vs Core i5-8400T 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 i9-9900X vs Core i5-8400T in synthetic CPU benchmarks
Performance Specifications
The Core i9-9900X vs Core i5-8400T in core CPU performance specifications
Core i9-9900X
Oct 19th, 2018
Cores
10-core
100%
L3 Cache
19.25 MB
100%
Base Frequency
3.5 GHz
100%
Turbo Frequency
4.4 GHz
100%
Max. DDR4 RAM Speed
2666 MHz
100%
Core i5-8400T
Apr 2nd, 2018
Cores
6-core
60%
L3 Cache
9 MB
47%
Base Frequency
1.7 GHz
49%
Turbo Frequency
3.3 GHz
75%
Max. DDR4 RAM Speed
2666 MHz
100%
Specifications
Comparison of all specifications
Core i9-9900X | SpecificationsComparison of all specifications | Core i5-8400T |
|---|---|---|
| General | ||
Oct 19th, 2018 | Release Date | Apr 2nd, 2018 |
| $989.00 | MSRP | $182.00 |
Desktop | Segment | Desktop |
| Intel Socket 2066 | Socket | Intel Socket 1151 |
| Skylake | Codename | Coffee Lake |
| 165 W | Power Consumption | 35 W |
| Performance | ||
10 | Cores | 6 |
20 | Threads | 6 |
3.5 GHz | Base Frequency | 1.7 GHz |
4.4 GHz | Turbo Frequency | 3.3 GHz |
19.25 MB | L3 Cache | 9 MB |
| Other Features | ||
| DDR4 @ 2666 MHz | RAM | DDR4 @ 2666 MHz |
| No | Integrated Graphics | UHD Graphics 630 |
Yes | Overclockable | No |
