I just installed my Graphics Card with the drivers. I decide to play some Dota 2, but a few minutes upon entering the game, my monitor and sound die (the sound freezes then shuts off with the monitor), even though my desktop is still on and running perfectly fine. I turn off the computer and turn it on again, but it happens again when I get on Minecraft. I think it's something with the new PSU I installed, but I'm not sure. This is the first time I've modified my computer, so I would appreciate if you guys would go more in depth into your answers.
Computer specs:
http://h10025.www1.hp.com/...c=en&lc=en
New PSU:
Corsair Builder Series CX 430 Watt ATX/EPS 80 PLUS (CX430)
New Graphics Card:
PNY NVIDIA GeForce GT 630 2GB GDDR3 VGA/DVI/HDMI PCI-Express Video Card VCGGT6302XPB