HP dx2355 Hardware Reference Guide: HP Compaq Business Desktops dx2355 Microto - Page 15

Hardware Upgrades Installing Additional Memory The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2-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 4GB of memory configured in a high-performing dual channel mode. DDR2-SDRAM DIMMs For proper system operation, if the computer supports DDR2-SDRAM DIMMs, the DIMMs must be: ■ industry-standard 240-pin ■ unbuffered PC2 6400 800 Mhz-compliant* ■ 1.8 volt DDR2-SDRAM DIMMs The DDR2-SDRAM DIMMs must also: ■ support CAS latency 6 (CL=6) for DDR2 / 800 Mhz* ■ contain the mandatory JEDEC SPD information In addition, the computer supports: ■ 512Mbit, 1Gbit and 2Gbit non-ECC memory technologies ■ single-sided and double-sided DIMMS ✎ The system will not start if you install unsupported DIMMs. *Can downgrade support to PC4200 533 Mhz and PC2 5300 667 Mhz. Hardware Reference Guide www.hp.com 2-5