NEC PC800-45 NON-ECC 2X256MB MC-4R256FKE6D-845 Dell Dimension 8200 (400MHz FSB Only) 8100 PC800 RDRAM RIMM Capacity: 512MBTotal, 2 X 256MB modules Brand: NEC, The most popular brand in RDRAM. Specs: PC800, 184-pin RIMM 800-45 NON-ECC Rambus RDRAM Model: MC-4R256FKE6D-845