AMD
Radeon RX 6900 XT
RDNA 2 · 16 GB GDDR6 · 300 W
82
/ 100
From $999
VS
Intel
Arc B580
Battlemage · 12 GB · 190 W · PCIe 4.0 x8
82
/ 100
From $249
Specdex verdict
Dead heat — it comes down to priorities.
In our weighted Specdex score, Radeon RX 6900 XT lands at 82 and Arc B580 at 82. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick Radeon RX 6900 XT if…
- ✓More VRAM at price tier
- ✓FSR support
- ✓Driver open-source on Linux
Pick Arc B580 if…
- ✓Incredible $/frame at 1440p
- ✓12 GB VRAM on a budget card
- ✓Modern AV1 + XeSS 2
Radeon RX 6900 XT 82
vs 82 Arc B580
Score breakdown
Radeon RX 6900 XT
82 raster 82
rt 72
ai 67
efficiency 76
Arc B580
82 raster 82
rt 76
ai 80
efficiency 84
Specs side-by-side
| Spec | Radeon RX 6900 XT | Arc B580 |
|---|---|---|
| Architecture | RDNA 2 | Xe2 Battlemage |
| VRAM | ▲ 16 GB GDDR6 | 12 GB GDDR6 |
| TBP | 300 W | 190 W |
| Release year | 2020 | — |
| Xe cores | — | 20 |
| Ray Tracing Units | — | 20 |
| XMX engines | — | 160 |
| Memory bus | — | 192-bit |
| Bandwidth | — | 456 GB/s |
| Base clock | — | 1.70 GHz |
| Boost clock | — | 2.67 GHz |
| PCIe | — | PCIe 4.0 x8 |
Radeon RX 6900 XT
Pros
- +More VRAM at price tier
- +FSR support
- +Driver open-source on Linux
Cons
- −RT trails NVIDIA
- −AI ecosystem smaller
- −Driver day-0 bugs
Arc B580
Pros
- +Incredible $/frame at 1440p
- +12 GB VRAM on a budget card
- +Modern AV1 + XeSS 2
Cons
- −PCIe 4.0 x8 interface (not x16) — bottlenecks on PCIe 3.0 boards
- −Older DX11 titles can still struggle
- −Needs resizable BAR
FAQ: Radeon RX 6900 XT vs Arc B580
Which is better, Radeon RX 6900 XT or Arc B580? +
Both score 82 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
Is Radeon RX 6900 XT worth the price? +
At $999, Radeon RX 6900 XT delivers a Specdex score of 82 — strongest in raster.
Is Arc B580 worth the price? +
At $249, Arc B580 delivers a Specdex score of 82 — strongest in efficiency.
Does Radeon RX 6900 XT or Arc B580 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.