HP Dx5150 Hardware Reference Guide - dx5150 Microtower Model (2nd Edition) - Page 15

Hardware Upgrades Installing Additional Memory The computer comes with double data rate synchronous dynamic random access memory (DDR-SDRAM) dual inline memory modules (DIMMs). DIMMs The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory support, you can populate the system board with up to 8GB (1-Gbit Technology) of memory configured in a high-performing dual channel mode. ✎ The memory available may be limited by the operating system. DDR-SDRAM DIMMs For proper system operation, if the computer supports DDR-SDRAM DIMMs, the DIMMs must be: ■ industry-standard 184-pin ■ unbuffered PC3200 400 MHz-compliant ■ 2.5 volt DDR-SDRAM DIMMs. The DDR-SDRAM DIMMs must also: ■ support CAS latency 3 (CL = 3) ■ contain the mandatory JEDEC SPD information In addition, the computer supports: ■ 128Mbit, 256Mbit, 512Mbit, and 1Gbit non-ECC memory technologies ■ single-sided and double-sided DIMMS ■ DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not supported ✎ The system will not start if you install unsupported DIMMs. Hardware Reference Guide www.hp.com 2-5