Lenovo ThinkCentre M77 Hardware Maintenance Manual (HMM) - ThinkCentre M77 - Page 88
Installing or replacing a memory module, Installing a PCI card - thinkcentre m 77
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7. Pivot the card latch to the closed position to secure the PCI card. Figure 10. Installing a PCI card 8. To complete the replacement, go to "Completing the parts replacement" on page 112. Installing or replacing a memory module Attention: Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to: http://support.lenovo.com This section provides instructions on how to install or replace a memory module. Your computer has four slots for installing or replacing DDR3 UDIMMs that provide up to a maximum of 16 GB system memory. When installing or replacing a memory module, use 2 GB or 4 GB DDR3 UDIMMs in any combination up to a maximum of 16 GB. The following table provides information about the memory module installation rules that you should consider when installing or removing a memory module. The "X" mark indicates the memory slot(s) into which the memory module(s) should be installed in different situations. The numbers 1, 2, 3, and 4 indicate the installation sequence. To locate the memory module slots, see "Locating parts on the system board" on page 77. UDIMM One UDIMM Two UDIMMs Three UDIMMs Four UDIMMs DIMM 1 X, 3 X, 3 DIMM 2 X, 4 DIMM 3 X X, 1 X, 1 X, 1 DIMM 4 X, 2 X, 2 X, 2 84 ThinkCentre Hardware Maintenance Manual