DDR2..i can guess ehat it stands for.size an compatable..not great with hardware..soft ware..but be enrolled a you tube diy tech institute..jk..i learn any thing you say need to know first ..really help I read a couple parts of a hardware could help the static charge relation and handspring back up or turning on them maybe they're just too old I don't know much research as much as I can but does anybody know how to clean the GPU CPU RAM sticks hard drive exedra And with what by the way Max really appreciate you taking the time to answer question for me means a lot to a guy was trying to learn