Fasters dell rams

We couldn't possibly know the speed of the ram with the minimal information you've given, and personally I've never found faster ram to do much good in a Dell.

what do you need to know

there should be a code on them like pc-(something)

Faster speeds won't honestly help that much. You'd get maybe a couple of percent at best. I wouldn't bother.

what do i do to speed this up i have 3gb and a 500 harddrive its to slow it is freezeing up its all new for as ram and harddrive