I just got an RX 6600 from second hand market and wanted to test it just to be sure. There was a Furmark screenshot on the seller's pictures which is tested on Windows.

However when I did the Furmark test's Linux version, while it was mostly similar, my memory clock shown as 875 MHz. It was 1750 MHz on seller's test. I don't know technical part behind this but this is a x2 difference I noticed. Also it was 14 Gbps on Windows while mine was 3.5 Gbps, the difference is x4 here.

There is probably a measurement difference between Windows and Linux drivers here, but like I said I don't know the technical details behind these tests.

So, is this the same / different measurement or should I be worried about this card?