Asus M5A99FX PRO R2.0 - Manual (Page 23)

ASUS M5A99FX PRO R2.0 1-9
Chapter 1
1.2.3 Central Processing Unit (CPU)
The motherboard comes with a surface mount AM3+/AM3 socket designed for the AMD ®
FX™-Series/Phenom™ II/Athlon™ II/Sempron™ 100 Series Processors.
The AM3+ socket has a different pinout from the 940-pin socket designed for the AMD
Opteron processor. Ensure that you use a CPU designed for the AM3+ socket. The CPU
fits in only one correct orientation. DO NOT force the CPU into the socket to prevent
bending the connectors on the socket and damaging the CPU!
Ensure that all power cables are unplugged before installing the CPU.