its the crappy dfi board. heres a few questions
1. what type of ram are you using? when i had my dfi board i started using kingston valueram with it, i know for a fact dfi boards don't work with any type of valueram, its dfi's fault. get new low latency ram and reformat your pc and cmos
2. what type of psu are you using? i know for a fact that dfi baords don't work with seasonic psu's. if it is you're going to have to get a new psu, or a new motherboard, i suggest a new mb.
3. reformat your pc, and install everything carefully, some programs don't play well together, first install your mb drivers, then your video drivers. get online, and update your windows fully. then run Sp2004 for a day. if no errors then start installing your other programs.
or you can just avoid all of this and get a new mb, i've had many problems with DFi and so have everyone at
www.dfi-street.com. they say that website is meant for dfi owners with problems, but it seems to be a bunch of people posting their problems and others replying with "oh, i have the same problem, will someone help me?" i haven't gotten any help from that website..