i have an old opteron sever board but it says am2 on the socket itself, i was looking for opterons for sell for the am2 but only pulled up socket 940 opterons are they compatable or the same thing or what?
No. Quoting Wikipedia:
''AM2 processors are incompatible with 939 motherboards and vice versa, and although it has 940 pins, it is incompatible with Socket 940''