memory upgrade help

[sfxhewitt]

hi im upgrading ram for a friend but he has a very old pc with a pentium 2 which i know can only handle 4gb of ram but im not sure which type of ram its either pc100 or pc133 is there anyway to find out or will both type's work ?

 

[Rudster8161]

download cpu z and see what kind he has currently and just buy that

also PC133 can rune at PC100 speeds but not vice versa

 

[sfxhewitt]

yeh but if there is pc133 in his system he cant down grade can he it wont accept it ?