Hynix 2GB DDR2 PC2-5300 DDR2-667MHz ECC Fully Buffered CL5 240-Pin DIMM Dual Rank Memory Module (HYMP125F72CP8N3-Y5). This is a seller refurbished part in great working condition. May show signs of cosmetic wear but this should not interfere with the effectiveness of the product. Taken from a working environment.