1Gb and 2Gb stick compatibility

[redzoneos]

I have Corsair XMS2 TWIN2X2048-6400C4 RAM currently installed in my PC. That's 2x 1Gb sticks of ram.

I have vista 64 ultimate and I think I should probably add some more ram since I'm running the 64 bit version.

I was thinking about adding some Corsair 2x 2Gb sticks so that the total RAM in my system becomes 6Gb.

Is this possible, or will it lead to compatibility issues?
I have an Abit IP35-E processor, MSI Radeon HD3870, E2160 CPU O.C.d to 2.8 Ghz.

If it is possible, what additional ram could I buy? Does it have to be the exact same DDR2800 Cas 4 specs??

 

[Guest]

I believe it's possible as long as you have the memory sticks working in duel channel(put them into the corresponding slots) but i am not sure though

 

[dallasjoh]

Make sure the memory is the same speed, timing, and voltage. You may have to raise the NB voltage a little, outside of that, I think you will be OK.