User Manual
Page 17
... the motherboard. 2. Position the CPU above the socket such that the socket lever is designed for the AMD Opteron™ processor. Small triangle ASUS M4N78 SE Socket lever Gold triangle 1-7 Unlock the socket by pressing the lever sideways, then lift it fits in place. otherwise, the CPU will not fit in one correct orientation...
... the motherboard. 2. Position the CPU above the socket such that the socket lever is designed for the AMD Opteron™ processor. Small triangle ASUS M4N78 SE Socket lever Gold triangle 1-7 Unlock the socket by pressing the lever sideways, then lift it fits in place. otherwise, the CPU will not fit in one correct orientation...