Several possibilities:I read a a forum that if you have four slots for ram and you have two slots filled with 2x512 the that third shot could not be used for ram, I dont nelieve it, but if there is some weird scenario liek this does anyone know about it>?
And some only 512MBsome even supported 1Gb only
Well it depends how much dual channel means to you. If you value Dual Channel then get two sticks or four sticks. If you dont then get 3I have two slots open and the other two are filled 2x512
Uh.............. how badly do you want dual channelAlso when you say how much duel channel means to me, what do you mean?