Radeon RX 7900 XTX vs RTX 4080
Short answer: which is best?
Radeon RX 7900 XTX is 30.3 % stronger than RTX 4080. Radeon RX 7900 XTX ranks #2 of 59 measured graphics cards at WhatFPS (18,924 GPU score over 2 verified runs). RTX 4080 ranks #5 of 59 measured graphics cards at WhatFPS (14,521 GPU score over 5 verified runs). The numbers are measured in 7 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Radeon RX 7900 XTX | RTX 4080 |
|---|---|---|
| GPU score (the card's own performance) | 18,924 | 14,521 |
| Best rig (GAMING — whole PC) | 13,434 | 14,765 |
| Earth II (Vulkan) | 79.8 FPS | 63.1 FPS |
| Mission to Earth II (DX12) | 101.6 FPS | 78.4 FPS |
| Earth II Landing (DX12 Ultimate) | 89.5 FPS | 67.1 FPS |
| Supernova (DX11) | 41.7 FPS | 105.7 FPS |
| Memory bandwidth | 122 GB/s | 204 GB/s |
| VRAM | 24 GB | 16 GB |
| Ray tracing | Yes | Yes |
Fragz' verdict
The Radeon RX 7900 XTX takes a decisive lead in this comparison, outscoring the RTX 4080 by 30.5%. However, with only two verified runs for the Radeon card, the sample size is thin, suggesting some uncertainty. Across our testing, the Radeon RX 7900 XTX consistently delivered higher frame rates in all three GPU scenes, with highlights like 79.8 FPS in Earth II (Vulkan) and 101.6 FPS in Mission to Earth II (DX12). This performance is backed by a significantly higher raw compute, with an ALU index of 803269, and 24 GB of VRAM, though the RTX 4080 does offer 195 GB/s of memory bandwidth and a peak clock of 2895 MHz. For gamers prioritizing top-tier frame rates and ample VRAM for future titles, the Radeon RX 7900 XTX appears to be the stronger contender in our metrics. The RTX 4080, despite its lower overall GPU score, still ranks highly and offers competitive performance, especially with its higher memory bandwidth.
Generated September 29, 2026 from the 7 verified runs available then. The verdict is never silently rewritten — new numbers get a new verdict.
What the numbers mean
The GPU score is the graphics card's own performance — that is what we rank on. GAMING is the whole rig's score in the best PC we measured the card in, and depends on processor, memory and storage. We show both and never mix them.
All numbers come from our benchmark suite: four hand-built 3D scenes written directly against the graphics APIs in Rust, the same load on every PC. The methodology is open at https://whatfps.com/metodik
All measurements for Radeon RX 7900 XTX · All measurements for RTX 4080