Thanks Ill check out the Gskill PC8000PQ kits

The slots I was talking about using were 2 black ones (rather than the far yellow and black) so just leaving the 2 yellows empty - so that should still be running in dual channel (i believe) but for some reason I get the feeling i read somewhere (no idea where or how creadible) that the using the black slots was somehow worse than the yellows - was just not sure by how much (or at all).