Hi, I just recently bought a 4k monitor for my computer and I noticed my graphics card wasn't powerful enough to run 4k videos and games so I bought an Evga Geforce GTX 970 graphics card. Then I noticed my power supply (450 watts) wasn't powerful enough for the graphics card. So I bought a 600 watt power supply and now my computer won't boot up when the GTX 970 is in. The monitor, mouse and keyboard aren't getting any signals. I took the GTX 970 out and put the old one in and now everything is working. Does anyone know why the more powerful graphics card isn't working right? Here are the specs for my computer. Thanks!
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02103283&cc=us&dlc=en&lc=en#N109
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02103283&cc=us&dlc=en&lc=en#N109