For a long time I have been viewing my PC on my LCD TV through vga. Recently, I bought a DVI to HDMI cable to hook up my nvidia 6800xt to my samsung LCD TV HDMI port. I did this, and upon reboot the windows logo appeared and began to load. After loading, my computer instantly rebooted. I've tried it a few times and it does this every time, but my vga cable still works 100%. Any ideas?