RAM & Memory Upgrades
4GB DDR2 533/667/800MHz 240-PIN ECC FULLY BUFFERED DIMM (FBDIMM) MEMORY RAM COMPATIBLE WITH SERVERS/WORKSTATIONS/MOTHERBOARDS (*NOT FOR PCs*) (2 RANK CHIPKILL)
SIZE/CAPACITY: 4GB (1 x 4GB) VOLTAGE/POWER CONSUMPTION: 1.8v CAS LATENCY: CL4 / CL5 SPEED: PC2-4200 (533MHz) / PC2-5300 (667MHz) / PC2-6400 (800MHz) - THREE SEPARATE MODULES AVAILABLE TYPE/INTERFACE: 240-PIN DDR2 ECC FULLY BUFFERED DIMM (FBDIMM) (2...
https://www.bizrate.co.uk/ram_memoryupgrades/4gb-ddr2-533-667-800mhz-240-pin-ecc-oid34347816819.html