Does the Core i5-8400 bottleneck the RTX 4090?

Q: Does the Core i5-8400 bottleneck the RTX 4090?

Yes — the CPU is clearly holding this build back. Build score 61/100. Best-value upgrade: Ryzen 5 7600X (+25% performance, 267 €).

Yes — the CPU is clearly holding this build back

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

The pairing

CPU	Core i5-8400 — score 43
GPU	RTX 4090 — score 82
Bottleneck	CPU (modéré)
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.

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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.