I have a 980ti graphics card (I just upgraded from a 770) and my power uspply is only 475w. I researched it and found that the 980ti recommends 600w PSUs. When I just turn my computer on, I can normally use my browser, discord, flash games and watch youtube videos. However, when i try to load games like overwatch, h1z1, or smite, when parts get graphically intensive, either my computer screens turn black and I can only hear audio (discord still functions so its not turning off) or it WILL completely turn off and restart itself. I'm wondering if this is a problem that would be caused by a weak PSU, because I will buy one if necessary if there seems to be no other fix. Thanks for the help.