I could have just put this in as an edit to my last post, but I'm lazy.
Your stats, as I see them, are as such:
CPU: 2.4GHz (assuming no overclock) AMD Athlon X2
Memory: 4GB DDR RAM (unknown mfg/model/DIMM #'s)
Motherboard: ??? (unknown mfg/model)
Video: 2x 256MB 7800GTX (unknown mfg)
Storage: 600GB HD space (unknown mfg/model; probably two 300GB drives)
Power Supply: ??? (unknown mfg/model)
Sounds like you have a variety of issues, and people can be quick to blame it on a Windows installation. You mentioned something about the cord. Try replacing that. You should also determine whether or not your power supply can drive everything you're putting on it. If it's a 450W, you're probably putting too much strain on it.
If the issue isn't resolved, remove the router and try starting again. If that fixes it, your computer might not like the router, or you're using the incorrect drivers for it, particularly if you're using active management software. Remember, this is Windows XP 64.
Find out what kind of motherboard you have. Then go to the company's site and download the manual (probably in PDF format, which you read with Adobe Acrobat) and the latest set of BIOS flash. Do what you can to tweak your BIOS to get things working. You should reset everything to default settings and get your timings RIGHT. Particularly your memory timings, which can screw things up. To get memory timing (CAS w-x-y-z), you'll need to know exactly what kind of memory it is, and then go to the mfg's site (if the timings aren't on one of the DIMM's heat chassis) to find its design timings. And make sure all of your memory is identical. You don't want, for example, a pair that say 1.1 on them while the other pair says 1.2. While it may not hurt, I don't like to gamble. Particularly if you're going to overclock them back up at some point.
Edit: Sorry if I included "for noobs" information, but I like to be thorough in situations where I don't have a crystal-clear knowledge of someone else's technical understanding.
Last edited by unnamednewbie13 (2006-03-04 22:42:00)