Server Memory FBD ECC 667MHz 4GB 8GB For Hynix HP DDR2 PC2-5300 2Rx4 4Rx4 PC2-5300F FB-DIMM RAM Fully-Buffered DIMM FBDIMM RAM - AliExpress
Sun 540-7708 4Gb Server Memory Kit (2x 2Gb DDR2 667MHz PC2-5300F)
416472-001, Hewlett Packard Enterprise 2GB, 667MHz, PC2-5300F-5, DDR2, dual-rank x4, 1.50V, registered, fully-buffered with ECC, dual in-line memory module (FBDIMM) - Part number is for one 2GB DIMM | EET