Thanks for the input.
I failed to mention fellas that windows 98 sec edtion loaded fine when xp did not on the same 810L configuration.
So I thought my copy of xp pro was bad.
But then it loaded fine on a 920 pc chip board with the same ram and hard drive that I removed form the 810 board.
I did not change the power supply on the 810 board though.
I'll also download the memchecker.
I loaded orginal bio's settings. I'll try optimal next.
Chill block and copper shim and fan are working on cpu.
Thanks again.
Norm