8 ContentsRemoving the Expansion-Card Riser . . . . . . . 239Installing the Expansion-Card Riser . . . . . . . 243Processors . . . . . . . . . . . . . . . . . . . . . . . 243Processor Installation Guidelines . . . . . . . . 243Removing a Processor . . . . . . . . . . . . . . 244Installing a Processor. . . . . . . . . . . . . . . 259FlexMem Bridge (PowerEdge M910 Only) . . . . 261HT Bridge Card (PowerEdge M905 Only) . . . . . 262Blade System Board NVRAM Backup Battery . . . . . 265Hard Drives . . . . . . . . . . . . . . . . . . . . . . . 267Hard Drive Installation Guidelines . . . . . . . . 267Installing a Hard Drive . . . . . . . . . . . . . . 267Removing a Hard Drive . . . . . . . . . . . . . . 269Configuring the Boot Drive . . . . . . . . . . . . 269Removing a Hard Drive From aHard-Drive Carrier . . . . . . . . . . . . . . . . 269Installing a Hard Drive in aHard-Drive Carrier . . . . . . . . . . . . . . . . 270Video Controller (PowerEdge M905, M805,M605, and M600 Only) . . . . . . . . . . . . . . . . . 272Hard-Drive Backplane . . . . . . . . . . . . . . . . . 274Blade System Board . . . . . . . . . . . . . . . . . . 276Removing the System Board . . . . . . . . . . . 276Installing the System Board. . . . . . . . . . . . 280Storage Controller Card . . . . . . . . . . . . . . . . 281Removing the Storage Controller Board . . . . . 281Installing the Storage Controller Board . . . . . 282Midplane Interface Card (PowerEdge M610x) . . . . 283Removing the Midplane Interface Card . . . . . 283