Originally posted by: foodfightr
You can run four single sided sticks or two double sided sticks without a performance decrease.
If you use three or four double sided sticks you will take a performance hit, I'm pretty sure it is standard across all motherboards, but I could be wrong.
Go to this
link and scroll down to the memory table.
D-D (DDR 400)
S-S-S (DDR 400)
S-S-D (DDR 333)
D-D-D (DDR 333)