Thanks for the replies. I have the 95w version of the 1055T, and this cpu has been added support through an update that ASUS posted. I think they haven't updated the support list but here's the link to the update with the description. http://support.asus.com/cpusupport/detail.aspx?SLanguage=en&p=1&m=M5A78L-M%20LE&cpu=Phenom%20IIX6%201055T(HDT55TWFK6DGR),2.8GHz,95W,rev.E0,SocketAM3,6-Core&pcb=ALL&sincebios=0209&memo= I have tried removing the battery and unplugging all the cables, as well as loading setup defaults but I still get that error. I'm using the stock cooling fan, and using a thermaltake 500W CPU. I have been using this build for about 2 years now, and this problem suddenly pops up. Thanks again.