Originally Posted by breadcrums
apart from my current 1x4gb corsair xms3 ram stick
i have a 2gb gskill ram stick @1333mhz.i had to remove it after i overclocked my system as it was unstable @1600mhz.
so now 4gb @1600mhz or 6gb@1400mhz(thats the max the gskill 2gb stick can go upto.)
PS-the 2gb gskill and 4gb corsair have the same timings but corsair is rated @1.65v and gskill at 1.5v
If I were you, I'd see if I could trade the two sticks for some 2x2GB (so dual channel is enabled) , locally if possible, and it won't need to be 1600 either. Or you use both and, of this I'm not sure, this would be dual channel for the first 4GB (the G.Skill and 1/2 of the Corsair) and the rest would be used as single channel, I've read that Intel uses this technology but I'm not sure on which platforms it's available or if there are other disadvantages. Heck, I'd almost send you 2x2GB OCZ Plat 1600...
As robbo2 says, for normal SMP WU the RAM plays a lesser role than, say, for a 6904 (12 core bigadv) but I think there was a thread a while back where someone did a test going from single channel to dual and saw a significant improvement, I think it was a i3 that was being used. The higher clocked and the more cores I'd say the difference is gonna be bigger when going from single to dual.