Buy on Amazon
$74.64
In Stock
Availability
Availability
AvailabilityMSRP in USD: $499
Availability
MSRP in USD: $499
Key Differences
In short — Ryzen 9 3900X 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 Ryzen 9 3900X is 640 days newer than the cheaper Core i5-8400.
Advantages of Intel Core i5-8400
- Up to 80% cheaper than Ryzen 9 3900X - $74.64 vs $375.0
- Consumes up to 38% less energy than AMD Ryzen 9 3900X - 65 vs 105 Watts
Advantages of AMD Ryzen 9 3900X
- Performs up to 4% better in Assassin's Creed Odyssey than Core i5-8400 - 136 vs 131 FPS
- Can execute more multi-threaded tasks simultaneously than Intel Core i5-8400 - 24 vs 6 threads
Assassin's Creed Odyssey
Resolution
1920 x 1080
Game Graphics
Ultra High
Intel Core i5-8400 Desktop Processor 6 Cores up to 4.0 GHz LGA 1151 300 Series 65W
Buy for $74.64 on Amazon
In Stock
Updated 74378 minutes ago
AMD Ryzen 9 3900X 12-core, 24-thread unlocked desktop processor with Wraith Prism LED Cooler
Buy for $375 on Amazon
In Stock
Updated 74378 minutes ago
TOP 5 Games
Resolution
1920 x 1080
Game Graphics
Ultra High
Core i5-8400
Desktop • Oct 5th, 2017
Ryzen 9 3900X
Desktop • Jul 7th, 2019
Geekbench 5 Benchmarks
Core i5-8400
Desktop • Oct 5th, 2017
Single-Core
1353
79.91730655640875%
Multi-Core
4748
47.77621251760918%
Intel Core i5-8400 | vs | AMD Ryzen 9 3900X |
|---|---|---|
| Oct 5th, 2017 | Release Date | Jul 7th, 2019 |
| Core i5 | Collection | Ryzen 9 |
| Coffee Lake | Codename | Matisse |
| Intel Socket 1151 | Socket | AMD Socket AM4 |
Desktop | Segment | Desktop |
| 6 | Cores | 12 |
| 6 | Threads | 24 |
| 2.8 GHz | Base Clock Speed | 3.8 GHz |
| 4.0 GHz | Turbo Clock Speed | 4.6 GHz |
65 W | TDP | 105 W |
| 14 nm | Process Size | 7 nm |
| 28.0x | Multiplier | 38.0x |
| None | Integrated Graphics | None |
| No | Overclockable | Yes |
Builds Using Core i5-8400 or Ryzen 9 3900X
Assassin's Creed Odyssey, 1920 x 1080, Ultra High
103 FPS
$29.13/FPS
GeForce RTX 3090
Ryzen 9 3900X
24 GB, N/A Storage
Buy on Amazon
$2,999.99
In Stock
95 FPS
$28.18/FPS
GeForce RTX 3080
Ryzen 9 3900X
16 GB, N/A Storage
Buy on Amazon
$2,677.08
In Stock
80 FPS
$20/FPS
GeForce RTX 3070
Ryzen 9 3900X
16 GB, 500 GB SSD + 1 TB HDD
Buy on Amazon
$1,599.99
In Stock
28 FPS
$30.36/FPS
Radeon RX 580
Core i5-8400
8 GB, 1 TB HDD
Buy on Amazon
$849.99
In Stock
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