HP Xw9400 HP xw9400 Workstation - Service and Technical Reference Guide - Page 85

Installing a memory module NOTE: HP only ships DIMMs that are electrically and thermally compatible with this product. Because third-party DIMMs might not be electrically or thermally compatible, they are not supported by HP. 1. Disconnect power from the system (Pre-disassembly procedures on page 55) and remove the access panel (Access panel on page 63). Lay the workstation on its side with the system board facing up. 2. Depress the green tabs on the memory fan housing (1) and lift the unit out of the chassis (2). Figure 5-17 Removing the memory fan 3. Gently push out on the socket levers. 4. Prepare to load memory modules in valid configurations: ● DIMMs must be loaded in matched pairs. ● If loading two DIMMs, install them in slots 1a/1b. ● If loading four DIMMs, install them in slots 1a/1b and 2a/2b for a dual CPU system, or in 1a/ 1b and 3a/3b for a single CPU system. ● If loading six DIMMs, install them in slots 1a/1b, 2a/2b, and 3a/3b. ● If loading eight DIMMs, install them in all slots. ● Load the memory module pairs in order of size, from largest to smallest. Figure 5-18 Identifying memory slots 2 4 1 3 5. Lower the DIMM straight down, and be sure the socket levers secure the module into place. ENWW Removing and replacing components 75