Hey everyone, I've got a Dimension E521 w/ an AMD 64 X2 5600+, 2 GB DDR2-667MHz, 7300LE graphics card, running Vista x32.  I recently added an Hauppauge WinTV HVR-1800 tv tuner and my system has been crashing randomly, telling me that my graphics card crashed, it does a system dump and shuts down.  It boots up again no problem.  
I have the latest drivers installed and the most recent BIOS version.  I was reading about IRQ's and looked mine up in device manager.  My graphics card and tv-tuner both use IRQ 16, could this cause my problem? Should a graphics card have its own dedicated IRQ?  If so, can anyone tell me how to fix it?  Thanks for your help in advance!