i5-11400F vs Ryzen 9 3950X
Full specification comparison between the Intel Core i5-11400F (2021) and the AMD Ryzen 9 3950X (2019).
i5-11400F
Intel Entry-level
- ✓ Lower power draw (65 W vs 105 W)
- ✓ Cheaper at launch ($157 vs $749)
- ✓ Newer (2021 vs 2019)
- ✓ Better performance per dollar
Ryzen 9 3950X
AMD Entry-level
- ✓ More cores (16 vs 6)
- ✓ Larger L3 cache (64 MB vs 12 MB)
- ✓ Higher boost clock (4.7 vs 4.4 GHz)
Verdict: The i5-11400F and Ryzen 9 3950X deliver essentially the same level of performance — the difference is within a few percent and won't be noticeable in real use. The decision comes down to price, power draw and features.
For gaming the i5-11400F leads, but the Ryzen 9 3950X pulls ahead in heavily multi-threaded work like rendering, compiling and video export thanks to its stronger multi-core throughput.
Note they use different platforms (LGA1200 vs AM4), so this is a motherboard decision too, not just a CPU swap.
At launch pricing, the i5-11400F offers more performance per dollar, and the i5-11400F is the more power-efficient chip.
Estimated performance
Estimated average 1080p gaming performance compiled from publicly available benchmark data. Individual games vary.
Specs side by side
| Specification | i5-11400F | Ryzen 9 3950X |
|---|---|---|
| Family | Rocket Lake | Zen 2 |
| Socket | LGA1200 | AM4 |
| Release year | 2021 | 2019 |
| Est. gaming perf. | ||
| Est. multi-core perf. | ||
| Est. single-core perf. | ||
| Cores | ||
| Threads | ||
| Max boost clock | ||
| L3 cache | ||
| TDP (base) | ||
| Integrated graphics | None | None |
| Launch MSRP |
Green bars mark the better value in each row (for power and price, lower wins).
Frequently asked questions
Is the i5-11400F better than the Ryzen 9 3950X?
They perform almost identically (within ~3%). Choose based on price, power consumption and platform rather than raw speed.
How much faster is the i5-11400F than the Ryzen 9 3950X?
Roughly 3% on average in gaming workloads. The gap varies by title, resolution and settings.
Which processor is better value?
Comparing launch prices, the i5-11400F delivers more performance per dollar. Check current street prices, as market pricing often shifts the value equation.