RTX 5090 vs RTX 4080 SUPER
Short answer: which is best?
RTX 5090 is 96.3 % stronger than RTX 4080 SUPER. RTX 5090 ranks #1 of 56 measured graphics cards at WhatFPS (28,389 GPU score over 6 verified runs). RTX 4080 SUPER ranks #6 of 56 measured graphics cards at WhatFPS (14,460 GPU score over 2 verified runs). The numbers are measured in 8 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | RTX 5090 | RTX 4080 SUPER |
|---|---|---|
| GPU score (the card's own performance) | 28,389 | 14,460 |
| Best rig (GAMING — whole PC) | 21,848 | 13,665 |
| Earth II (Vulkan) | 134.1 FPS | 62.6 FPS |
| Mission to Earth II (DX12) | 174.4 FPS | 79.2 FPS |
| Earth II Landing (DX12 Ultimate) | 113.8 FPS | 66.3 FPS |
| Supernova (DX11) | 115.2 FPS | 99.7 FPS |
| Memory bandwidth | 698 GB/s | 163 GB/s |
| VRAM | 31 GB | 16 GB |
| Ray tracing | Yes | Yes |
Fragz' verdict
The RTX 5090 is the clear winner here, outperforming the RTX 4080 SUPER by a massive 94.2% in overall GPU score. This lead is evident across all our GPU benchmarks, with the RTX 5090 nearly doubling the frame rates in Earth II Vulkan (132.8 FPS vs 62.6 FPS) and Mission to Earth II DX12 (171.4 FPS vs 79.2 FPS), and showing a significant uplift in Earth II Landing DX12 Ultimate (113 FPS vs 66.3 FPS). The RTX 5090 also boasts substantially higher raw compute with an ALU index of 1020560 compared to 305965, much greater memory bandwidth at 660 GB/s versus 163 GB/s, and nearly double the VRAM at 31 GB. It's important to note that the RTX 4080 SUPER's data comes from only one verified run, so there's some uncertainty in its reported performance. Despite the overwhelming lead, the RTX 4080 SUPER still holds a respectable rank of 5 out of 43, making it a very capable card for high-performance gaming if you don't need the absolute top-tier.
Generated September 18, 2026 from the 8 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 RTX 5090 · All measurements for RTX 4080 SUPER