Xerox 4540 Service Manual - Page 185

Note - For optimum performance, all DIMMs controlled by a given CPU should be the same capacity and all single-rank or dual-rank. Mixed configurations are supported, but could result in lower memory performance. Note that all supported 4GB and 8GB DIMMs are dual-rank. For 1GB and 2GB DIMMs, you can identify the type by counting the DRAMs; single-rank DIMMs have 18 DRAMs, while dual-rank DIMMs have 36 DRAMs. 1. Read Steps 1 through 5 in "To Remove Memory Modules (DIMMs) (CRU)" on page 3-61. 2. Install the DIMMs. a. Ensure that the DIMM slot ejectors at each end of the memory socket are fully open (rotated outward) to accept the new DIMM. b. Align the notch in the bottom edge of the DIMM with the key in the DIMM socket. See FIGURE 3-29. c. Press down evenly on both top corners of the DIMM until the ejectors snap over the cutouts in the left and right edges of the DIMM. 3. Replace the system controller to the server (X4500). See "Replacing the System Controller (FRU)" on page 3-68. 4. Replace the cable management assembly if necessary. See one of the following docs depending on your CMA version: ■ Sun Fire X4500/X4540 Installation Guide ■ Sun X4500-J Slide Rail Installation Guide (X4500) ■ "Early-Production Slide Rail and CMA Information" on page G-1 (X4500) ▼ To Install a PCI-X or PCIe Card (FRU) The Sun Fire X4500 accommodates up to two PCI-X cards and the X4540 servers accommodates up to three PCIe expansion cards that meet PCI 2.2 specifications and the PCI-X Mechanical and Electrical Addendum with the following limitations: ■ Low-profile cards only ■ MD2 (6.600-in. reference) maximum length cards ■ Standard component height limits ■ 25W maximum power per card Chapter 3 Maintaining the Sun Fire X4500 and X4540 Servers 3-65