Capacity: 2GBType:DDR2 240Pin FB-DIMM Memory.Speed: PC2-5300F 667MHzCache Latency: CL5Voltage:1.8V.Buffering/ECC: ECC Fully Buffered Packing List:2GB DDR2 2Rx4 PC2-5300F 667MHz ECC Fully Buffered FB-DIMM Memory Please note: this memory is only for Fully Buffered FB-IDMM ECC Server, it does not fit any pc/ordinary computer / Intel or AMD motherboard.NOTE:1. Before you order, make sure the RAM is compatible with your motherboard/CPU.2. If have any question, welcome to contact us through email or eBay message, our professional customer service will solve it for you.