Made the mistake of thinking 12GB was enough, but I keep crashing out of memory while running sparse matrix solver... a few more GB should do it.
Is it valid to replace 3 of the 2GB modules with three 4GB ram modules, for 18GB total ? I realize that its "probably" valid, and "might" break triple-channelness, but does anyone have a specific experience trying this?
Mods- I think this is the same question, but unanswered and questionable choice of title... could be merged with my question. http://superuser.com/questions/139090/semi-hybrid-triple-channel-ddr3