AMD
Radeon RX 580 8GB
Polaris · 8 GB GDDR5 · 185 W
52
/ 100
From $229
VS
GeForce RTX 5090 wins by 46
NVIDIA
GeForce RTX 5090
Blackwell · 32 GB GDDR7 · 575 W
98
/ 100
From $1,999
Specdex verdict
GeForce RTX 5090 takes it — here’s why.
In our weighted Specdex score, Radeon RX 580 8GB lands at 52 and GeForce RTX 5090 at 98. That puts GeForce RTX 5090 ahead by 46 points — a decisive margin driven mostly by its strengths in the categories below.
Pick Radeon RX 580 8GB if…
- ✓More VRAM at price tier
- ✓FSR support
- ✓Driver open-source on Linux
Pick GeForce RTX 5090 if…
- ✓Unrivaled 4K and path-tracing
- ✓DLSS 4 Multi-Frame Gen
- ✓32 GB VRAM for AI
Radeon RX 580 8GB 52
vs 98 GeForce RTX 5090
Score breakdown
Radeon RX 580 8GB
52 raster 52
rt 42
ai 40
efficiency 74
GeForce RTX 5090
98 raster 100
rt 100
ai 100
efficiency 78
Specs side-by-side
| Spec | Radeon RX 580 8GB | GeForce RTX 5090 |
|---|---|---|
| Architecture | Polaris | Blackwell |
| VRAM | 8 GB GDDR5 | ▲ 32 GB GDDR7 |
| TBP | 185 W | 575 W |
| Release year | 2017 | — |
| CUDA cores | — | 21,760 |
| Tensor cores | — | 680 (5th gen) |
| RT cores | — | 170 (4th gen) |
| Memory bus | — | 512-bit |
| Bandwidth | — | 1792 GB/s |
| PCIe | — | PCIe 5.0 x16 |
Radeon RX 580 8GB
Pros
- +More VRAM at price tier
- +FSR support
- +Driver open-source on Linux
Cons
- −RT trails NVIDIA
- −AI ecosystem smaller
- −Driver day-0 bugs
GeForce RTX 5090
Pros
- +Unrivaled 4K and path-tracing
- +DLSS 4 Multi-Frame Gen
- +32 GB VRAM for AI
Cons
- −Enormous power draw
- −Two-slot+ cooler required
- −Scarce MSRP supply
FAQ: Radeon RX 580 8GB vs GeForce RTX 5090
Which is better, Radeon RX 580 8GB or GeForce RTX 5090? +
GeForce RTX 5090 scores 98 on our weighted rubric — ahead by 46. Your best pick depends on the sub-scores above.
Is Radeon RX 580 8GB worth the price? +
At $229, Radeon RX 580 8GB delivers a Specdex score of 52 — strongest in efficiency.
Is GeForce RTX 5090 worth the price? +
At $1,999, GeForce RTX 5090 delivers a Specdex score of 98 — strongest in raster.
Does Radeon RX 580 8GB or GeForce RTX 5090 last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.