RX 6700 XT (used) vs Arc B580

Used or new? A used RX 6700 XT 12GB is the kind of card that shows up cheap on eBay, and the Arc B580 12GB is what you'd buy new at a similar budget. In the Tom's Hardware GPU hierarchy (June 2026), the RX 6700 XT 12GB (used) averages 54 fps at 1440p and 28 at 4K; the Arc B580 12GB averages 51 and 28. At 1080p the averages are 79 and 72 fps. That makes the RX 6700 XT 12GB (used) about 6% faster at 1440p (10% at 1080p; at 4K they tie).

Both have 12GB of video memory. In games the RX 6700 XT 12GB (used) draws about 230W and the Arc B580 12GB about 190W; power supply advice is about 600W (our rule of thumb) vs about 550W (our rule of thumb). The RX 6700 XT 12GB (used) is about 267mm long, 2.5 slots thick and uses standard 8-pin power; the Arc B580 12GB is about 272mm long, 2 slots thick with standard 8-pin power.

For upscaling, the RX 6700 XT 12GB (used) uses FSR 3 and the Arc B580 12GB uses XeSS; support varies by game. A used card's real price swings a lot by listing, so compare the live price here with the condition in the photos.

Our take: used cards save money but usually lose the store warranty, so buy from sellers with returns and check the photos. If the used card isn't clearly cheaper per frame, buy new.