| if you going to run the duel channel you going to want some decent branded ram, and a match pair, Same manufacture, same timeings, etc. etc. etc. But as skaven said unless your doing some major video editing or photoshopping your not going to notice a HUGE diffrence. 
 Example Encodeing 40 min movie with 1 gig non DC = 3.97 mins
 Example Encodeing 40 min movie with 1 gig DC ram = 3.60 mins
 
 (just tossing out numbers here people i know that there way off but its just an example)
 
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