AMD Processor?Professionals help.?

yesterday when i opened my PC i saw that my pc was noising,so i opened amd overdrive.I had a phenom II 955,but yesterday overdrive showed me that I have some Other processor named AMD engineering sample.It has different clocks and temp was around 57C.normally it was 38C to 40C.i have not downloaded new BIOS or overclocked it from a week. what could problem be?