User's Manual

Quick Reference Guide 37
• Memory modules can be single rank (1R) or dual rank (2R) and should be installed in the
following order:
• The highest rank memory module in DIMM_1 and DIMM_2
• Equal or lower rank memory modules in DIMM_3 and DIMM_4
• Single rank (1R) memory modules in DIMM_5 and DIMM_6
• If only two memory modules are installed, they must be installed in DIMM_1 and DIMM_2.
These connectors are located on the outside edge of the board.
• Memory modules should be installed in the following order: connectors DIMM_1 and
DIMM_2, DIMM_3 and DIMM_4, and then DIMM_5 and DIMM_6.
If dual-rank modules are installed in DIMM_3 and DIMM_4, then DIMM_5 and DIMM_6
cannot be used.
• Dual-rank memory modules are not supported in DIMM_5 and DIMM_6.
NOTE: Memory purchased from Dell is covered under your computer warranty.
NOTICE: If you remove your original memory modules from the computer during a memory upgrade,
keep them separate from any new modules that you may have, even if you purchased the new modules
from Dell. If possible, do not pair an original memory module with a new memory module. Otherwise, your
computer may not start properly. You should install your original memory modules in pairs in connectors
DIMM_1 and DIMM_2, connectors DIMM_3 and DIMM_4, and then DIMM_5 and DIMM_6.
NOTICE: If you install more than 4 GB of memory, you must also install a fan to cool the computer. If you
do not install a fan, you will get an error message stating that you must install a fan or remove
some memory.