Posted 16 April 2009 - 10:05 PM
After upgrading to an ATI 4850, I popped in a new 650w PSU with more than sufficient power for the whole system (I'm positive of this). Now, when I try to boot, Windows freezes on the login screen, this is also true with safe mode. With the last PSU (500w, working properly), I had the same problem, thinking that improper power was being supplied to the GPU, I upgraded the PSU to what I have now, but same problem. My old nVidia 9600 GSO worked perfectly fine with the old PSU, no freezes, which is what made me think, power problem.
Before I installed my ATI, I removed all nVidia drivers and uninstalled the hardware before adding ATI. I have not had a chance to install the Catalyst drivers for the new ATI card being as my computer freezes before I have a chance. At times, the computer will load past the login screen and freeze as the "startup" programs are beginning to run, before I have network access. I am downloading a live linux (ubunut) CD now to see if I can boot to it without freezes (meaning that it's my OS), but I don't have much hope.
Any ideas on how to fix this? My motherboard is compatible with PCIe v2, which both cards were, so I don't think that's the problem. I'm hoping that it's a bad OS installation, which is a pain in the ass, but I can fix that tonight whereas if it is a bad GPU, I'm going to have to send it back to newegg and wait around for the replacement. So, who has ideas? Remember, I CANNOT get into Windows XP from either a regular boot, nor a safe mode boot.
Thanks for any help you can provide guys, this is beyond my experience.