SKU : 39M5790 mfg.: IBM Description :IBM 4GB (2X2GB) 2RX4 PC2-5300F MEMORYThe IBM 39M5790 2GB DDR2 SDRAM memory module has a storage capacity is 2 GB. The memory technology is DDR2 SDRAM, with the number of modules is 1 x 2 GB. The Bus speed is 667 Mhz DDR-667/PC2-5300, with the data integrity check is ECC. The signal processing is registered with the CAS latency timings is CL5. The ram features are fully buffered with the form factor being 240-PIN Dimm. The products are Grade A system pulls which means they were pulled from a server but they have been tested and work.We offer same day ground shipping on orders over $50 within the 48 contiguous states, a one-year warranty, if you have any questions, feel free to chat with our web representative.