I got some new RAM from OWC, installed it, and my Mac Pro (2006) now will not boot. The fans spin up and I hear the startup chime but the screen remains blank. The fans stay spinning at full blast and don't spin down like normal. The first thing I tried was taking out the new RAM but this didn't fix it. Same problem. I tried resetting the SMC by pressing the button on the motherboard. I tried resetting the PRAM. No effect whatsoever. Also tried booting from the restore discs but that did nothing either. I am at a loss. I've installed RAM upgrades on all of my Macs and never a problem like this. Update: I changed the name of this thread since it now appears my Mac Pro actually boots and operates normally, but there is no video at all, indicating a dead video card.