I got an XFX 6800 XT in May of last year. I tried a few different voltage values and ended up keeping this one. I’ve played many games since then including demanding titles like Cyberpunk 77 and Indiana Jones and the Great Circle, and it has been very stable. I think I lucked out.
That said, the delta between the hotspot and GPU temp is a bit high for my liking, around 20 degrees (gpu: ∼57c, hotspot: ∼77c) when playing. The fan curve looks flat because I’m using FanControl.