RX 580 vs Arc B580
Arc B580
$369.99 new
$329.95 used on eBay
See Arc B580 price on Amazon → See used listings on eBay →Price difference: $110.00 (29.7%) — the RX 580 is cheaper. Used gap: $250.95 .
Specs compared
| Spec | RX 580 | Arc B580 |
|---|---|---|
| Memory | 8 GB | ★ 12 GB |
| Memory type | GDDR5 | GDDR6 |
| Boost clock | 1340 MHz | ★ 2760 MHz |
| Core clock | — | — |
| TDP | 185 W | — |
| Interface | PCIe 3.0 | — |
| Length | — | — |
| New price | $259.99 ★ | $369.99 |
| Used price (eBay) | $79.00 | $329.95 |
★ indicates the better value for that spec.
Verdict
With the Arc B580 running 30% above the RX 580 — a $110.00 premium — the two cards sit in meaningfully different price brackets. The RX 580 wins on value unless the extra performance matters for your workload.
The Arc B580's 12 GB of VRAM is a 4 GB advantage over the RX 580. At 4K or in heavily modded games that extra buffer matters — and it provides headroom as future titles push VRAM requirements higher.
Unless you specifically need what the Arc B580 offers, the RX 580 is the stronger value at this price gap.
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Prices as of October 16, 2026. Updated daily.