I currently have 2 Gb on my MB... I have 4 slots, two (2) of which have 1 Gb memory sticks in them. (PC5400 DDR2 667 Mz).
Can I add two sticks of 2 Gb memory to the other two slots (thus having 1 Gb in two slots, and the 2 Gb sticks in the other 2 slots), or do I have to replace the 1 Gb sticks and go with 2 Gb sticks in all four slots? (Money is the issue here, I would like to hang on to the 1 Gb memory sticks until I get more funds).