Radeon RX 9070 XT vs Arc B390 GPU
Short answer: which is best?
Radeon RX 9070 XT is 365.8 % stronger than Arc B390 GPU. Radeon RX 9070 XT ranks #7 of 74 measured graphics cards at WhatFPS (14,034 GPU score over 10 verified runs). Arc B390 GPU ranks #51 of 74 measured graphics cards at WhatFPS (3,013 GPU score over 1 verified runs). The numbers are measured in 11 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Radeon RX 9070 XT | Arc B390 GPU |
|---|---|---|
| GPU score (the card's own performance) | 14,034 | 3,013 |
| Best rig (GAMING — whole PC) | 12,063 | 4,693 |
| Earth II (Vulkan) | 64.8 FPS | 12.2 FPS |
| Mission to Earth II (DX12) | 70 FPS | 16.8 FPS |
| Earth II Landing (DX12 Ultimate) | 66.3 FPS | 14.3 FPS |
| Supernova (DX11) | 32.4 FPS | 27.5 FPS |
| Memory bandwidth | 105 GB/s | 21 GB/s |
| VRAM | 16 GB | — |
| Ray tracing | Yes | Yes |
Fragz' verdict
The Radeon RX 9070 XT delivers a crushing victory over the Arc B390 GPU, leading by an incredible 281.9% in overall GPU score. This performance gap is evident across all our GPU scenes, with the Radeon card hitting 64.5 FPS in Earth II Vulkan and 49.9 FPS in Earth II Landing DX12 Ultimate, while the Arc B390 GPU struggled to break 17 FPS in any test. Furthermore, the Radeon RX 9070 XT features a significantly higher raw compute (ALU index), 105 GB/s of bandwidth, and a crucial 16 GB of VRAM, compared to the Arc B390 GPU's 21 GB/s and 0 GB VRAM. Although the Arc B390 GPU has only one verified run, the Radeon RX 9070 XT is the undeniably superior choice for gamers seeking high performance and future-proofing.
Generated November 7, 2026 from the 11 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 9070 XT · All measurements for Arc B390 GPU