HP xw6000 manual Memory Expansion, Hp workstation xw4000 DDR Memory

11

Removal and Replacement Procedures Expansion Cards and Memory

For an overview of the different chassis discussed in this chapter, refer to Chapter 6 “Identifying the Chassis, Routine Care, and Disassembly Preparation.”

ÄCAUTION: .Voltage is always applied to the system board when the system is plugged into an AC power source. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

11.1Memory Expansion

11.1.1 hp workstation xw4000 DDR Memory

The hp workstation xw4000 DDR system features an Intel 845E-based system board that includes two memory sockets that accept industry-standard double-data rate (DDR) SDRAM DIMMs. The two memory module slots are populated with at least one preinstalled memory module. To achieve the maximum memory support, you may be required to replace the preinstalled DIMM with a higher capacity DIMM.

For proper system operation, the DIMMs must be industry-standard 184-pin, unbuffered PC2100- compliant DDR DIMMs. The DIMMs must support CAS Latency 2 or 2.5 (CL = 2 or CL = 2.5). They must also contain the mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect (SPD) information. DIMMs constructed with x4 SDRAM (16 ICs per side) are not supported; the system will not start using unsupported DIMMs.

The Intel 845E chipset supports both PC1600 and PC2100 DDR DIMMs. These systems are shipped with PC2100 DDR DIMMs, which provide optimal (266-MHz) performance. If both PC1600 and PC2100 DDR DIMMs are installed in a computer, the system memory will run at the lower (200-MHz) speed.

✎The Intel 845E chipset-based systems ship with non-ECC memory, but will support ECC memory. To utilize ECC functionality all installed DIMMs must be ECC types. Mixing ECC and non-ECC DIMMs is not supported.

ÄCAUTION: Memory module sockets have gold metal contacts. When upgrading the memory, it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

Service Reference Guide 11–1