I have 1gb right now, 2x512 PC3200. If you are running them in slots 1&2 then you are not in dual channel mode. If you look at the RAM slots you'll notice that 1&3 are blue, 2&4 are black. If you put them in either of those pairs you will be running in dual channel mode.Originally posted by: Pas2002
how much ram do you have in you system?
right now i am running them in 1&2 but i want to get 2 more sticks and run 4x512 in dual ddr 400MHz
thanks