Dell PowerEdge 2850 - Manual (Page 50)

a. Open the expansion-card latch. See Figure 6 -4 .
b. Grasp the expansion card by its top corners, and carefully remove it from the expansion- card connector.
7. If you are removing the card permanently, install a metal filler bracket over the empty expansion slot opening and close the expansion-card latch.
8. Replace the expansion-card cage. See " Replacing the Expansion-Card Cage ."
9. Reconnect all expansion-card cables.
10. Close the system. See " Closing the System " in "Troubleshooting Your System."
System Memory
The six memory module sockets can accommodate from 256 MB to 16GB of registered ECC PC2-3200 (DDR 2 400) memory. The memory sockets are located on
the system board under the memory module shroud adjacent to the power supply bays. See
Figure A -3 .
You can upgrade the system memory by installing combinations of 256-, 512-MB, 1-GB, 2-GB, and 4-GB (when available) registered memory modules. You can
purchase memory upgrade kits from Dell.
The memory module sockets are arranged in three banks on two channels (A and B). The memory module banks are identified as follows:
l Bank 1: DIMM1_A and DIMM1_B
l Bank 2: DIMM2_A and DIMM2_B
l Bank 3: DIMM3_A and DIMM3_B
General Memory Module Installation Guidelines
l If only one memory module is installed, it must be a 256 MB module installed in socket DIMM_1A.
l If two or more memory modules are installed, they must be installed in pairs of matched memory size, speed, and technology.
l The system supports both single-ranked and dual-ranked memory modules.
Memory modules marked with a 1R are single ranked and modules marked with a 2R are dual ranked.
l If you install both single-ranked and dual -ranked memory modules, the dual-ranked memory modules must be installed in bank 1, regardless of
capacity.
l If bank 2 contains dual-ranked memory modules, then bank 3 must be unpopulated.
l Dual-ranked memory modules are not supported in bank 3.
Spare Bank Support
If six memory modules of the same size are installed, the memory modules in bank 3 (DIMM3_A and DIMM3_B) can function as a spare bank. The following
restrictions apply when configuring memory for spare bank support:
l All six memory modules must be single-rank modules.
l All six memory modules must have the same capacity.
Memory Mirroring Support
The system supports memory mirroring if identical memory modules are installed in bank 1 and bank 2, and no memory modules are installed in bank 3.
Table 6 -3 and Table 6 -4 show examples of different memory configurations. Table 6 -4 lists the various allowable combinations of single- and dual-ranked
memory modules
Table 6-3. Sample Memory Configurations
NOTE: You must install a filler bracket over an empty expansion slot to maintain Federal Communications Commission (FCC) certification of the
system. The brackets also keep dust and dirt out of the system and aid in proper cooling and airflow inside the system.
NOTE: The memory modules must be PC2-3200 compliant.
NOTICE: If you remove your original memory modules from the system during a memory upgrade, keep them separate from any new memory modules
that you may have, even if you purchased the new memory modules from Dell. Use only registered ECC DDR II memory modules.
NOTE: Dual-rank memory modules with less capacity take precedence over single-ranked memory modules with greater capacity.