512MB PC2-4200 ECC Registered DDR2-533
512MB PC2-4200 DDR2-533 Registered ECC (1-Rank) (Non-Returnable/Non-Exchangable)
2GB DDR2-677 ECC FB-DIMM LP
Supermicro/Hynix MEM-DR220L-HL01-FB8: ECC FBDIMM Low-Profile FMHS PB FREE 240pin 1.8v ( HYMP125F72CP8D3-S5) - 2GB 2GB) - DDR2 - ECC - Fully Buffered