GPU head-to-head · curated specs + live pool data
RTX 4090VSRX 7800 XT
Specifications
| RTX 4090 | RX 7800 XT | |
|---|---|---|
| VRAM | 24 GB GDDR6X | 16 GB GDDR6 |
| Memory bus | 384-bit | 256-bit |
| TBP | 450 W | 263 W |
| PCIe | Gen 4 | Gen 4 |
| Local AI (Q4 fit) | 32B · ~113 tok/s @8B | 14B · ~70 tok/s @8B |
Live benchmark data
Not enough verified runs yet for a fair pool verdict — averages appear once each side has at least five.
Verdict — RTX 4090
If you already have one, keep it — it's still a top-tier card. If you're shopping used, weigh it against a new 5080; the used discount needs to be significant to justify the older architecture.
Verdict — RX 7800 XT
Best price-per-frame at 1440p for its generation. FSR is workable, RT is passable but not why you'd buy it. Very popular pick with informed budget builders.