Compaq D310 manual Main Memory, Dimm slots

System Features

Main Memory

DIMM slots

There are two memory module slots on the system board for installing main memory. You can install 266MHz DDR-SDRAM modules, these are available in 128, 256 and 512MB memory modules. You can install a maximum of 1GB (2 x 512MB modules).

You can only use non-ECC memory modules.

Short for Double Data Rate-Synchronous DRAM, DDR-SDRAM is a type of SDRAM that supports data transfers on both edges of each clock cycle, effectively doubling the memory chip's data throughput. DDR-SDRAM also consumes less power. DDR-SDRAM is also called SDRAM II.

While the new memory module is clocked at the same speed as normal SDRAM, it is able to transport double the amount of data by using the rising as well as falling edge of the clock signal for data transfers. DDR-SDRAM has another important enhancement over SDRAM. Its voltage supply uses only 2.5 V, instead of 3.3 V. This and the lower capacities inside the memory chips lead to significantly reduced power consumption.

DDR-SDRAM DIMMs are not compatible with SDRAM DIMMs . The new DDR-DIMMs come with 184 instead of the 168 pins used by SDRAM-DIMMs. The module itself looks almost identical to SDRAM, but it has only one notch on its connector surface instead of the two notches found on SDRAM-DIMMs.

Evo D310 Micro Desktop 21