RX 7900 XTX vs RTX 5080: Which Should You Buy?
Head-to-head on performance, VRAM, power and value for 2026.
Quick Summary · TL;DR
On our relative performance index the RTX 5080 leads the RX 7900 XTX by about 8% — a moderate gap. The RX 7900 XTX has more VRAM (24GB vs 16GB), which helps at high resolutions and in VRAM-hungry titles. The RTX 5080 adds NVIDIA DLSS and stronger ray tracing, while the RX 7900 XTX typically leans on raw rasterisation value.
| RX 7900 XTX | RTX 5080 | |
|---|---|---|
| Performance index | 80/100 | 86/100 |
| VRAM | 24GB | 16GB |
| Board power (TBP) | 355W | 360W |
| Recommended PSU | 850W | 850W |
| Power connector | dual 8-pin | 16-pin 12V-2x6 |
| Generation | RX 7000 | RTX 50 |
Relative gaming index — an estimate of typical performance. Real-world gaps vary by game, resolution and settings.
Which should you buy?
Buy the RTX 5080 if you want the higher frame rate and can find it at a fair price. Choose the RX 7900 XTX if it is clearly cheaper and its 16GB+ of VRAM and features cover your target resolution. For ray tracing and DLSS, the NVIDIA option has the edge; for raw rasterisation per dollar, the alternative often wins.
Power planning: RX 7900 XTX PSU · RTX 5080 PSU.
Frequently asked questions
Is the RX 7900 XTX better than the RTX 5080?
On our relative index the RTX 5080 is about 8% ahead of the RX 7900 XTX. The RX 7900 XTX has more VRAM (24GB vs 16GB), which helps at high resolutions and in VRAM-hungry titles. The smaller the gap, the more other factors like price, VRAM and features should decide it.
Which is better value, the RX 7900 XTX or the RTX 5080?
Value depends on the price you can find each at. The slower card is usually the smart buy if it is meaningfully cheaper, unless you need the extra VRAM or features of the faster one.
Do the RX 7900 XTX and RTX 5080 need different power supplies?
The RX 7900 XTX is rated around a 850W PSU and the RTX 5080 around 850W. Size for the more demanding card if you might upgrade, and prefer an ATX 3.x unit for any 12V-2x6 card.
Make sure your CPU can keep up with either card using the Bottleneck Estimator, or compare more cards in the GPU comparison hub.