A:AnswerHuge improvement over an rx580. These things are great. They trade blows with an rtx 2070 in terms of performance and use way less power/heat. A 3060 ti is a knotch above but this card will not dissapoint you.
A:AnswerCould you be more specific?
OC pro?
Are you comparing with another RX 6600 XT card, or some other "overclocked" card?
(Do be sure to check the actual GDDR6 RAM available, if you install this card. The one I bought only registered 4GB of VRAM when I checked it, (using HWInfo 64), after it benchmarked much lower than expected.)
A:AnswerI'm running it on PCIe3 with no issues so far. The testing a lot of tech Youtube creators did showed minimal performance hit on Gen 3 verse Gen 4. Uses standard 8 pin from your PSU and takes up 2.5 slots.