Intel D955XCS Product Guide - Page 32

Intel Desktop Board D955XCS Product Guide Installing and Removing Memory CAUTION To be fully compliant with all applicable Intel SDRAM memory specifications, the board requires DIMMs that support the Serial Presence Detect (SPD) data structure. You can access the PC Serial Presence Detect Specification at: http://www.intel.com/technology/memory/ddr/specs/dda18c32_64_128x72ag_a.pdf Desktop Board D955XCS has four 240-pin DIMM sockets arranged as DIMM 0 and DIMM 1 in both Channel A and Channel B, as shown in Figure 17. Guidelines for Dual Channel Memory Configuration Before installing DIMMs, read and follow these guidelines for dual channel configuration. Two or Four DIMMs Install a matched pair of DIMMs equal in speed and size (see Figure 13) in DIMM 0 (blue) of both channels A and B. 1 GB, 533 MHz 1 GB, 533 MHz Channel A Channel B DIMM 0 DIMM 1 DIMM 0 DIMM 1 Figure 13. Dual Configuration Example 1 If additional memory is to be used, install another matched pair of DIMMs in DIMM 1 (black) in both channels A and B (see Figure 14). 256 MB, 533 MHz 512 MB, 533 MHz 256 MB, 533 MHz 512 MB, 533 MHz Channel A Channel B DIMM 0 DIMM 1 DIMM 0 DIMM 1 Figure 14. Dual Configuration Example 2 32