alright so I got my new power supply and graphics card and after a while of putting a huge graphics card and psu in my minitower I tried everything and it didnt work. I turned it on and after about 3 mins the screen went blank and said no video signal, but everything else was still running fine. I restart and only got about 1 min. And then 45 seconds. Then I let it sit for half hour nad got 2 mins out of it. SO i put in my old graphics and make sure i fully uninstalll it, and i did. Try it again, samme thing. So idk. My psu obviously works because I'm using my old graphics card atm. And when I took out the new one it was VERy hot. I had to let it cool for little before i could remove it. Im guessing that the graphics card gets too hot and just shuts down? I would like to try as many solutions at once o I dont have to keep taking it in and out just to test one little thing. Any help/tips is helpful. psu= PC Power & Cooling S75QB 750W grpahics card = VisionTek 900244 Radeon HD 4870 ok when I put my old card in it was fine for about 4 hours now it seems to restart between 5 mins and a couple hours. So i thought that maybe some cords r in the fans way, so i shoved all the cards in hard drive slots and hopefully my old graphics card will stop reseting. I also get a blue screen sometimes but its only for 2 seconds and its when my computer is starting up It restarts and i have to shut it down and wait like 10 mins b4 starting up again. After playing with the cords it hasnt happened but idk if this is related to my other problem.