Buy on Amazon
$115
In Stock
Availability
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Key Differences
In short — Core i9-9940X outperforms the cheaper Core i5-8400 on the selected game parameters. We do not have the prices of both CPUs to compare value. The better performing Core i9-9940X is 379 days newer than the cheaper Core i5-8400.
Advantages of Intel Core i5-8400
- Up to 92% cheaper than Core i9-9940X - $115.0 vs $1388.88
- Consumes up to 61% less energy than Intel Core i9-9940X - 65 vs 165 Watts
Advantages of Intel Core i9-9940X
- Performs up to 15% better in Cities: Skylines II than Core i5-8400 - 30 vs 26 FPS
- Can execute more multi-threaded tasks simultaneously than Intel Core i5-8400 - 28 vs 6 threads
Cities: Skylines II
Resolution
1920 x 1080
Game Graphics
High
Intel Core i5-8400 Desktop Processor 6 Cores up to 4.0 GHz LGA 1151 300 Series 65W
Buy for $115 on Amazon
In Stock
Updated 78 minutes ago
Intel Core i9-9940X X-Series Processor 14 Cores up to 4.4GHz Turbo Unlocked LGA2066 X299 Series 165W Processors (999AC9)
Buy for $1,388.88 on Amazon
In Stock
Updated 78 minutes ago
TOP 5 Games
Resolution
1920 x 1080
Game Graphics
High
Core i5-8400
Desktop • Oct 5th, 2017
Core i9-9940X
Desktop • Oct 19th, 2018
Geekbench 5 Benchmarks
Core i5-8400
Desktop • Oct 5th, 2017
Single-Core
1353
92.73474982864977%
Multi-Core
4748
44.23327743618409%
Intel Core i5-8400 | vs | Intel Core i9-9940X |
|---|---|---|
| Oct 5th, 2017 | Release Date | Oct 19th, 2018 |
| Core i5 | Collection | Core i9 |
| Coffee Lake | Codename | Skylake |
| Intel Socket 1151 | Socket | Intel Socket 2066 |
Desktop | Segment | Desktop |
| 6 | Cores | 14 |
| 6 | Threads | 28 |
| 2.8 GHz | Base Clock Speed | 3.3 GHz |
| 4.0 GHz | Turbo Clock Speed | 4.4 GHz |
65 W | TDP | 165 W |
| 14 nm | Process Size | 14 nm |
| 28.0x | Multiplier | 33.0x |
| None | Integrated Graphics | None |
| No | Overclockable | Yes |
Builds Using Core i5-8400 or Core i9-9940X
Cities: Skylines II, 1920 x 1080, High
1 FPS
$849.99/FPS
Radeon RX 580
Core i5-8400
8 GB, 1 TB HDD
Buy on Amazon
$849.99
In Stock
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