you oc your graphic card at the same time? I find the bios AGP 2 options defaultis disabled, you can try to turn on them to see if any stability gain and performance drop and decide.Also i find the nv refresh rate lock maybe a problem for this case. and i use powerstrip maybe also a reason for hang. any alternative solution with same function of powerstrip? i can not find the right crack for that. For memory 273Mhz @2.8V 3-4-4-8 with my home-made cooling, yesterday i tested the prime95 memory torture test. I stopped it after around 19 hours without any errors. i find in this speed the best CAS bootable into windows is 2.5 the the best timing i find is 2.5-4-4-10. the 4-4 can not be tweaked further and the command is auto in my setting( it is actually in 2T mode since if i mannul set 1T even can not show agp screen). for the 10 cycle time in 2.5-4-4-10, it is the most efficient way and give you the best performance for L1&L2 cache under sciencemark 2.0, but it doestn't boost any memory throughoutput under sand (more...)