RAM

[Snowreap]

if it has 6 slots and you've filled 3, chances are good you're using an Intel i7 or something like that with 3-channel memory. for those types of systems, putting memory in 3 modules at a time works best, but iirc it should still work with just 1 or 2, just not quite as well.

I would avoid mixing RAM sizes within each bank of 3 slots though. for example, if your slots are numbered A1, A2, A3, B1, B2, B3 and you have 2 2GB sticks and 1 4GB stick, I would put both 2GB sticks into an 'A' slot, and the 4GB stick in a 'B' slot

across banks, different RAM sizes are fine -- 3 2GB modules plus 3 1GB modules is no problem, and I doubt 3GB plus 2 4GB modules would be a problem either (except your second bank would only have 2 out of 3 channels populated, so performance would be a bit lower).

-ken