Micro Star Computer MS- 9130 v1.x - Manual (Page 16)

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Hardware Setup
The mainboard supports Single/Dual AMD ® Opteron DP™ processor
(s). The mainboard uses two CPU sockets called Socket 940 for easy CPU
installation. You can install SINGLE or DUAL CPUs on the mainboard to meet
your own needs. Keep the following points in mind before installing CPU(s):
1. If SINGLE CPU is intended, always install the CPU on the CPU1
socket.
2. To install DUAL CPUs on the board, you must use the same type of
CPUs running at the same frequency.
Central Processing Unit: CPU
CPU1 & CPU2