Solved Just Installed GTX 560 Ti FPB

[xGodlyFirex]

I was wondering if EVGA would be having any kind of compatibility issues with Windows 8 Consumer Review. In the past, I had some issues before but I just wanted to make sure. I love that I just received my ModXStream-Pro OCZ 700W and my EVGA Geforce 560 Ti FPB but I'm very very new to this, the first time I put something new in my PC (Didn't expect the PSU to be bigger). I plugged the power supply cables in the right places, just the necessities like Optical disk drive, hard disk drive, mobo main power, mobo fan, and I ran diagnostics just in case. Everything running smoothly but I just wanted to ask a question about compatibility because my computer just froze and restarted automatically (First time that happened to this PC) after 5 minutes playing Bastion.
I also went for the Update in the Device Manager but now I went on the EVGA website and got the recent update from there.
Another question, why are the tabs on firefox changing colors? Sometimes I have the buttons on the top right (Minimize and Close) in a screwed up way. I don't know why I'm having this issue.
The computer I have is a HP p6654 PC

 

[Coolness]

Did you plug in both of the 6-pin PCI-e power connectors from the power supply to the graphics card? Did you install the newest Nvidia drivers?

 

[xGodlyFirex]

I fixed the problem already. Yah it turns out it was because of that. I used my PSU's PCI-E Cables and I guess the fan wasn't running. So I used the cables that came with the graphics card now it works, along with the loud fan.