Um... no. But it isnt going to be a noticable gain in performance or anything. The only thing more memory will help with is is you do video production or massive (like multi.- 20 layer images) graphic work. In that case youd notice a speed up in the call or rendering of information, but that is the absolute only time you would ever see a performance gain (marginal, at that).
Also- be sure the dell board can handle that much ram.
System specs? Lets just get down to it people:
My penis is bigger than yours.