Well I am glad you figured out your problem, see not always is it such a hard thing to solve hehe.
I would stay away from prime95. Its not the best in my opinion, When I did my first build I was so worried about prime95 and I ended up losing fun of what I wanted to do with my computer, play games and talk to friends.
I found prime95 to be a bit strict and seems to not be exactly what I would need in order to stay stable. I havent used prime 95 for a long time but I'll say this. If you can boot into windows, do all your benchmarks keep your computer cool and still play all games you love and no crashes. I consider that pretty stable. I don't need a program to say that the 23020320 shell of the 25950 bit that it had an error I could care a less..
I have my system below for a year and it hasnt crashed in over 6 months.
Goodluck though. some people live by prime95 to say they are stable.. I could care a less.. if I can own you in cs:s and dod:s and rainbow six and half life 2 why should I care if I failed prime95 5 secs before 24 hours?