Hard Drive/Video Card Issues?

[tgraszat14]

Hi, I'm having two problems with my pc. Both seem related but I'm not sure how to go about solving them.
The first is whenever I'm downloading a large file and leave my pc running, it tends to freeze up while I'm gone and I have to restart it. When it freezes up the HD light on the front of my tower stays lit up and doesn't blink or anything it stays solid. The second part is whenever I would watch a video or play a game my computer would freeze and for two secs I can click a separate window and switch to it but after that my screen is frozen and i can only use my mouse. The second one sounds like a video card issue but I've run stability tests and they haven't come up with anything. Any help I would hugely appreciate as having to restart my computer every 15 minutes or whenever I get home when I leave it downloading is a huge pain. I've also wiped my HD to see if that would help and reinstalled windows but it still does it.

This is my set up:

XFX 680i LT-E6750 @ 2.66
XFX 8800GT Alpha Dog
Mushkin HP2 (2x1gb)
Silverstone Element PSU
Coolermaster Centurion 5

Thanks guys! And congrats to us on winning the gold race

[clone63]

Done a HD health check and sector scan? Maybe try memtest. Otherwise I'm out of ideas except maybe a quirky motherboard defect.

[puroman1]

Is any parts of your system running hot?The only other thing ive had in the past
that caused this was my power supply going.Good luck

[Arinoth]

what's make and model of the hard drive?