Posted 15 September 2007 - 01:54 AM
Last night I tried upgrading from a 2.8GHz P4 800Fbs to a 3.4 P4 800 Fbs (still use some programs that don't take advantage of multiple cores so didn't want a totally new computer) and upgrade my graphics card from a Nvidia 5500 AGP to a 7600GT AGP. I was under the impression that one doesn't need to re-install windows when upgrading the CPU, but if that's the problem then I guess you can stop reading now (if I do need to re-install Windows, will a repair install be sufficient?).
First time I tried booting after installing both components, the Bios booted fine, but after trying for a minute or so, the computer stopped trying to load Windows XP, then tried to load from the CD-Rom drives, then gave up and said failed to load OS. I then tried putting back the old video card, tried again and got the same problem so I concluded that the problem had to do with the CPU. Seemed I was right at first since Windows seemed to boot fine with the new video card and old CPU, but when I reset it again it gave me the same problem. Even though I have a 550 watt PSU which I calculated to be more than enough for my computer, I thought there might be a lack of power getting to the C drive or something, so I put both the old video card and old CPU back, but this time I got the same problem. Windows wouldn't load, even though I had reverted to my original setup. I guess I should've tried booting from my Windows XP CD-Rom to see if I could still access the C drive, but didn't think to do so at the time.
So I took out the C drive, tried booting from another drive and that seemed to work but there was a problem with Windows on that one so I couldn't fully boot. Tried putting just the C:drive in again without any of my storage harddrives (1 IDE, 1 SATA) and no video card, and finally I got Windows to load again that way.
So I figure the problem is either my C:drive is on its last legs or a problem with my PSU (or a power cable). The PSU is only a month old or so, so I don't think it's that, but I might've accidentally bumped a power socket on the MoBo or harddrive somewhere and not noticed it.
So I'm going to get another harddrive and copy my C:drive to it, then take everything apart and make sure Windows loads as I install each drive/component before I try the new video card and CPU again.
In the meantime, I'd appreciate any advice or suggestions to as what the problem might be and what I should watch out for. I'll be happy to make another donation to this great site if necessary (will probably do so anyways next time I get some money in my PayPal account). My MoBo is a GA8IG1000MK rev 2.0 Intel 865G. Let me know if you need any other information.