Dell PowerEdge 1855 Memory (RAM)
All PowerEdge 1855 system boards support PC2-3200 (400MHz) DDR2 fully-buffered, ECC-registered memory DIMMS when installed in matching pairs. All system boards will support up to 4GB DIMMS for a maximum of 16GB RAM with the current BIOS revision.
Dell part numbers for memory normally signify individual DIMMs, whereas third-party memory like Kingston sometimes come in kits of two DIMMS. Check product description for details.
If you need assistance with installing memory modules, please see Dell's instructions below.