SKU : 39M5781 Mfg.: IBM Description : IBM 1GB (2 X 512MB) PC2-5300 KITThe IBM 39M5781 has a form factor of DIM 240-PIN with the technology being DDR2 SDRAM. The key features have a capacity of 512 MB with technical features with the bus clock rate being 667 MHZ/ PC2-5300, it has a data integrity check with ECC. The compatibility is CL5 has the modules QTY is 1 x 512 MB. 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.