How did you fix your problem?
I still have problems, wont let me install Windows Vista, I installed XP and it will reboot itself all the time.
So Im still having problems and cannot make the computer run
I was also putting memory in the wrong slot like you did. Other than that , it is happily running at 3.8.
Make sure cpu is not overheating. test your ram. format the hd. clear the cmos. install os at stock speed. leave everything at stock speed. let me know the progress.