Beginning dump of physical memory(blue screen)

just reformatted comp cause it was actin up. installed drivers from cds i had and now when i turn on the computer in takes about 3 minutes till it frezzes and goes to the blue screen or it just restarts but doesnt get passes the proactive Ai logo screen where u can option to get into bios by pressing delete.

asus a8n-sli
corsair xms 2x512
geforce 7800 gtx
amd athlon 4000
western digital HD 250gb