I recently bought an open box Sapphire RX 480 from Newegg to replace my Sapphire R9 270. I used DDU to uninstall all my old drivers. I installed the RX 480 into my system, and everything seemed to be going well. The card wasn't recognized at first probably because of no display drivers being installed, but my desktop would preform basic tasks. When I downloaded the latest drivers, my PC started to seriously lag and become unresponsive. I would click on something, my display would freeze for a few seconds, then turn back on again, repeatedly until an eventual blue screen saying Video_TDR_Failure. My old card still works just fine when reverting back. Could this be a faulty card? Bad PSU? Bad drivers? I would do a fresh windows install BUT I have a lot of programs I don't want to fiddle with getting again. Here's a video I made on it so you can see it first hand: https://youtu.be/M8LjqQt2zdI. As always guys, thank you so much!