I blue screen after trying to overclock amd 9950 BE

Hi, i baught the amd 9950 about 2 months ago and i wanted now to begin to overclock i overclocked it to 2,7 just to try and all ran fine then all of a sudden wile running 3d mark i blue screened it sad ; "A clock interrupt was not received on a secondary processor" I dont know if its my outdated motherboard r the 2gb of ram well here is my spec: 2gb ram 800mgh 32bt vista I have the ocz vendetta cpu cooler its new dont think that that is the problem the motherboard is GA-MA770-UD3 can the motherboard be the problem of my processor overheating? Plz help

thanks in advance

HMMMM, Sounds like one of your cpu's is not is not getting the message,get a hold of cpuz or some such program and look at all 4 cores whilst they are doing something see if they are all running at the same speed,make sure that your psu is up to scratch etc..