Radeon RX 7900 XTX vs Radeon RX 6600 XT
Short answer: which is best?
Radeon RX 7900 XTX is 347.3 % stronger than Radeon RX 6600 XT. Radeon RX 7900 XTX ranks #2 of 64 measured graphics cards at WhatFPS (18,924 GPU score over 2 verified runs). Radeon RX 6600 XT ranks #34 of 64 measured graphics cards at WhatFPS (4,231 GPU score over 1 verified runs). The numbers are measured in 3 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Radeon RX 7900 XTX | Radeon RX 6600 XT |
|---|---|---|
| GPU score (the card's own performance) | 18,924 | 4,231 |
| Best rig (GAMING — whole PC) | 13,434 | 4,552 |
| Earth II (Vulkan) | 79.8 FPS | 17.5 FPS |
| Mission to Earth II (DX12) | 101.6 FPS | 22.5 FPS |
| Earth II Landing (DX12 Ultimate) | 89.5 FPS | 20.4 FPS |
| Supernova (DX11) | 41.7 FPS | 23.7 FPS |
| Memory bandwidth | 122 GB/s | 42 GB/s |
| VRAM | 24 GB | 8 GB |
| Ray tracing | Yes | Yes |
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 Radeon RX 6600 XT