Well like I said lemons happen. On one of the GPUs I had ordered a capacitor was broken off clean during transport. Obviously was a shipping fault and not the manufacturers but I'd always check components at least visually and something like an HDD I'd plug in just to have a look at the S.M.A.R.T. logs.
any software you recommend to diagnose hardware, other than the bios? I know about CPU-Z, thing is I don't know if temps are too high or not, all I know is that 40C is optimal.