hmmm. So ur friend is running both the RAM (the ones he has now and the ones he plans to buy) at teh same frequency?
personally, i am running my system on 2 sticks of 256MB DDR333 CL2.5 RAM. I am planning to get a single stick of 512MB DDR400 CL2 RAM. I do plan to put in one DDR400 and one DDR333 to see if i get any stability problems. May be then i cud answer ur question more appropriately.
<b>thinking of a good sig. till then...</b>