Does the Core i5-8400 bottleneck the RTX 4090?
Slight CPU bottleneck — not dramatic
At 1440p with 16 GB of RAM and an SSD, this pairing scores 61/100. The CPU is the limiting side (CPU 43 vs GPU 82).
61/100
Build score for
Core i5-8400 + RTX 4090
Core i5-8400 + RTX 4090
The pairing
| CPU | Core i5-8400 — score 43 |
|---|---|
| GPU | RTX 4090 — score 82 |
| Bottleneck | CPU (limiting) |
| Socket | LGA 1151 |
Best-value upgrade
Best value
Ryzen 5 7600X
+25% performance · from 267 € · build score 61 → 76
Prices are live EU retail (EUR), refreshed weekly. US and UK support is coming soon.
Related checks
Same CPU, other GPUs
Which GPU pairs best with the Core i5-8400? →
Analyze your own build →This page is generated by the same deterministic engine as the interactive tool: real benchmark data, usage-weighted, with RAM and storage multipliers. Change the usage profile, RAM, storage or budget to get a result tailored to your actual build.