 "HP, 497765-B21, MEMORY 4GB ( 2X 2GB ) PC-6400"@en 497765-B21 "HP
"HP, 497765-B21, MEMORY 4GB ( 2X 2GB ) PC-6400"@en 
 "HP - DDR2 4 GB : 2 x DIMM 240-pin"@en, " HP memory 240-pin Series "@en Overview CNET"@en