Hey, what power is the CPU (VCore)getting, try changing you ram settings to 3 3 3 10 or maybe 3 3 3 11, Nforce 2 chipsets seem to prefer these settings, maybe the ram itself is dodgey, i can run my XP-M 2500+ at 220Mhz X 11, 1.8volt VCore, 2X512Mb Adata PC3200 using gigabyte 3D gooler pro...