DDR2 1GB 800Mhz Long DIMM PC 6400U DDR2 PC 6400U 1GB 800Mhz Product Description: AUM DDR2 PC 6400U 1GB 800Mhz Storage Capacity: 1GB Technology: DDRII DRAM Form Factor: Long DIMM 240-pin Memory Speed: 800 MHz ( PC- 6400U)