HP d248 HP Compaq Business Desktop d200 Series Personal Computers Service Refe - Page 105

E Memory Systems Using Single or Dual Channel Memory The d200 series computers come with Double Data Rate-Synchronous Dynamic Random Access Memory (DDR-SDRAM) Dual Inline Memory Modules (DIMMs). The memory sockets on the system board can be populated with industry-standard DIMMs and come from the factory with at least one preinstalled memory module per computer. To achieve the maximum memory support, you may be required to replace the preinstalled DIMM with a higher capacity DIMM. ✎ Only select models ship with dual channel memory capability. Number of Memory Number of Memory Channels Supported Sockets Maximum Memory Capacity 1 2 2 GB 2* 4 4 GB * Supports both single and dual channel modes (select models) The DIMMs used must be industry-standard 184-pin, unbuffered PC2100 266 MHz-, PC2700 333 MHz-, or PC3200 400 MHz-compliant (select models), 2.5 volt DDR-SDRAM DIMMs. The following features are required: ■ CAS latency 2, 2.5, or 3 (CL = 2, CL = 2.5, CL=3) ■ Modules must contain the mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect (SPD) information. ■ 128Mbit, 256 Mbit, and 512Mbit non-ECC memory technologies ■ Single and double-sided DIMMs may be used DIMMs constructed with x8 and x16 DDR devices and x4 SDRAM are not supported. ✎ The system will not start using unsupported DIMMs. Service Reference Guide, d300 336493-004 E-1