4GB 2 X 2GB PC2-5300F 667MHz 240 pin DDR2 SDRAM ECC Fully Buffered FB DIMM Server Low Power Memory for IBM System x3650 1914, 7979-xxx (PARTS-QUICK BRAND). Equivalent to IBM Part Numbers:
900468 - Visiontek® - SDRAM - 2gb DDR2 SDRAM Memory Module - 2GB PC2-6400 800MHZ CL5 - 6.6 in. l x 2.1 in. w