This forum could be used as an example...there are over 200,000 posts (I did a quick countup) and a pretty decent number of new posts daily and it copes well.
A quad 200mhz is 800mhz....if possible you may want something slightly faster but your ram seems ok.
A quad 200mhz is 800mhz....if possible you may want something slightly faster but your ram seems ok.