I have an original revision evga x58 SLI LE motherboard that requires a mod to utilize a westmere xeon x5670 that I got. I completed the mod and the cpu worked great . . . until I went on vacation. Powered up the computer after being away and received no post. Went back to my old 920 . . . but sad I don't have my 6 core extra cache goodness anymore. Woe is me.