As there is a lot of interest now about this topic, I just want to add that a few days ago I had an EVGA RTX 3080 XC3 black that was mining at a very mild 53% power limit and 80MHs ish. The card had been mining at more or less that TDP since I got it. Then it just simply died. No display. 3 months old. Fortunately the retailer I got it from is absolutely brilliant because the next day, without returning the card which they even came to collect for free, they sent me an EVGA RTX 3080 FTW3 Ultra gaming as a replacement, which is a more expensive, power hungry card. It works perfectly so it was definately the GPU that died. I'm now very dubious about mining. Maybe it was luck of the draw, who knows. I always had my eye on those temps and the VRAM never exceeded 96c. And 82c while mining.