Arc B580
Battlemage · 12 GB · 190 W · PCIe 4.0 x8
Radeon RX 6900 XT
RDNA 2 · 16 GB GDDR6 · 300 W
Dead heat — it comes down to priorities.
In our weighted Specdex score, Arc B580 lands at 82 and Radeon RX 6900 XT at 82. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick Arc B580 if…
- ✓Incredible $/frame at 1440p
- ✓12 GB VRAM on a budget card
- ✓Modern AV1 + XeSS 2
Pick Radeon RX 6900 XT if…
- ✓More VRAM at price tier
- ✓FSR support
- ✓Driver open-source on Linux
Winner by scenario
Derived from the sub-score breakdown · not a separate test4K & rasterization
TieTraditional rendering throughput at high resolution
Effectively tied — neither pulls a 2-point weighted lead.
Ray tracing
Arc B580RT-heavy titles with path-traced lighting
Arc B580 leads on rt (76 vs 72).
AI workloads
Arc B580Local inference, upscaling, generative tools
Arc B580 leads on ai (80 vs 67).
Power efficiency
Arc B580Frames per watt — heat, noise, and PSU sizing
Arc B580 leads on efficiency (84 vs 76).
Value for money
Arc B580Specdex score per dollar at MSRP
Arc B580 more score per dollar ($249 vs $999).
Score breakdown
Specs side-by-side
| Spec | Arc B580 | Radeon RX 6900 XT |
|---|---|---|
| Architecture | Xe2 Battlemage | RDNA 2 |
| Xe cores | 20 | — |
| Ray Tracing Units | 20 | — |
| XMX engines | 160 | — |
| VRAM | 12 GB GDDR6 | ▲ 16 GB GDDR6 |
| Memory bus | 192-bit | — |
| Bandwidth | 456 GB/s | — |
| Base clock | 1.70 GHz | — |
| Boost clock | 2.67 GHz | — |
| TBP | 190 W | 300 W |
| PCIe | PCIe 4.0 x8 | — |
| Release year | — | 2020 |
Arc B580
- +Incredible $/frame at 1440p
- +12 GB VRAM on a budget card
- +Modern AV1 + XeSS 2
- −PCIe 4.0 x8 interface (not x16) — bottlenecks on PCIe 3.0 boards
- −Older DX11 titles can still struggle
- −Needs resizable BAR
Radeon RX 6900 XT
- +More VRAM at price tier
- +FSR support
- +Driver open-source on Linux
- −RT trails NVIDIA
- −AI ecosystem smaller
- −Driver day-0 bugs
FAQ: Arc B580 vs Radeon RX 6900 XT
Which is better, Arc B580 or Radeon RX 6900 XT? +
Both score 82 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
Is Arc B580 worth the price? +
At $249, Arc B580 delivers a Specdex score of 82 — strongest in efficiency.
Is Radeon RX 6900 XT worth the price? +
At $999, Radeon RX 6900 XT delivers a Specdex score of 82 — strongest in raster.
Does Arc B580 or Radeon RX 6900 XT 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.
Which is better for ray tracing, Arc B580 or Radeon RX 6900 XT? +
Arc B580 — leads on rt (76 vs 72). RT-heavy titles with path-traced lighting.
Which is better for AI workloads, Arc B580 or Radeon RX 6900 XT? +
Arc B580 — leads on ai (80 vs 67). Local inference, upscaling, generative tools.