gpu gtx 1080 ti

The last couple of months i've experienced many games crashing for no reason. And i'm suspecting my old GTX 1080 TI is failing me. I've been trying out different solutions to find out if this is the case, and i have no idea if this could actually be the GPU or rather the PSU that gone bad. or...

Yesterday, I bought a MSI GeForce GTX 1080 Ti DUKE 11G graphics card and it has been reaching temperatures around 80-85C on games like Phasmophobia and 7 Days to Die. It is the same for games that that are a bit more demanding like Final Fantasy VII Remake and Fallout 76. Is this temperature too...