HP Compatible 455739-001 - 2GB DDR2 SDRAM Memory Module - 667Mhz DDR667/PC5300 - 1.80V - NON-ECC Unbuffered 200PIN SoDimm - Lifetime Warranty

667 MHz of memory speed with Unbuffered signal makes your computer perform like an athlete SoDIMM 2 GB memory allows you to have more programs open at a time DDR2 SDRAM interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computers performance