Dell PowerVault DL2000 DL2000 Hardware Owner's Manual - Page 100

System Memory You can upgrade your system memory to a maximum of 16 GB by installing 667MHz fully buffered (FB) DDR II memory modules in sets of 1-GB or 2-GB. The eight memory sockets are located on the system board under the cooling shroud adjacent to the power supply bays. See Figure 6-2. You can purchase memory upgrade kits from Dell. 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 667 MHz DDR II FB-DIMMs. The memory module sockets are divided into two equal branches (0 and 1). Each branch consists of two channels: • Channel 0 and channel 1 are in branch 0. • Channel 2 and channel 3 are in branch 1. Each channel consists of two DIMM sockets: • Channel 0 contains DIMM_1, DIMM_5. • Channel 1 contains DIMM _2, DIMM_6. • Channel 2 contains DIMM_3, DIMM_7. • Channel 3 contains DIMM _4, DIMM _8. The first DIMM socket of each channel has white release tabs. General Memory Module Installation Guidelines To ensure optimal performance of your system, observe the following guidelines when configuring your system memory. • Use only qualified Fully-Buffered DIMMs (FBDs). FBDs can be either single-ranked or dual-ranked. FBDs marked with a 1R are single-ranked and modules marked with a 2R are dual-ranked. • A minimum of two identical FBDs must installed. • DIMM sockets must be populated by lowest number first. • FBDs must be installed in pairs of matched memory size, speed, and technology, and the total number of FBDs in the configuration must total two, four, or eight. For best system performance, all four, or eight FBDs should be identical memory size, speed, and technology. 100 Installing System Components