RAM & Memory Upgrades
2GB DDR2 667MHz PC2-5300 240-PIN ECC FULLY BUFFERED DIMM (FBDIMM) MEMORY RAM COMPATIBLE WITH SERVERS/WORKSTATIONS/MOTHERBOARDS (*NOT FOR PCs*) (2 RANK)
SIZE/CAPACITY: 2GB (1 x 2GB) VOLTAGE/POWER CONSUMPTION: 1.8v CAS LATENCY: CL5 SPEED: PC2-5300 (667MHz) TYPE/INTERFACE: 240-PIN DDR2 ECC FULLY BUFFERED DIMM (FBDIMM) (2 RANK NON-ADVANCED ECC/NON-CHIPKILL) 240-PIN DDR2 ECC FULLY BUFFERED DIMM
https://www.bizrate.co.uk/ram_memoryupgrades/2gb-ddr2-667mhz-pc2-5300-240-pin-oid35310893601.html