Lenovo ThinkCentre Edge 91 Hardware Maintenance Manual (HMM) (April 2012) - Th - Page 89

7. Pivot the card latch to the closed position to secure the PCI card. 5 6 7 8 3 4 Figure 11. Installing a PCI card 8. Reinstall the screw to secure the PCI card latch in place. 9. To complete the installation or replacement, go to "Completing the parts replacement" on page 104. 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://www.lenovo.com/support 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 the following guidelines: • Use 1 GB, 2 GB, or 4 GB DDR3 UDIMMs in any combination up to a maximum of 16 GB. • Please refer to below table for detail memory modules installation sequence. UDIMM One UDIMM Two UDIMMs Three UDIMMs Four UDIMMs DIMM 1 X, 1 DIMM 2 X X, 1 X, 1 X, 2 DIMM 3 X, 2 X, 3 DIMM 4 X, 2 X, 3 X, 4 To install or replace a memory module, do the following: Chapter 8. Replacing FRUs (Machine Types: 1852, 1853, and 1855) 85