ASUS - ROG Astral RTX 5080 OC vs NVIDIA - GeForce RTX 4090

These two are nearly even on the Mars Score (77.5 vs 78). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the ROG Astral RTX 5080 OC if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are tdp, 3dmark time spy, boost clock. The single most decisive one: TDP — 90.00 W less. 360 vs 450.

Pick the GeForce RTX 4090 if you care most about cuda / stream cores / ray tracing cores. Its strongest claims are cuda / stream cores, ray tracing cores, vram, among others. The single most decisive one: CUDA / Stream cores — 52.38% more. 16384 vs 10752.

Both ship with comparable dlss, so those specs do not separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.