Question about Dual Channel in an 875 Intel P4C setup

[RollWave]

I initially had some Corsair XMS sticks (2x512) but have since purchased 1 value stick of 512 and then another value stick of 512 just recently. I put them all in and the system boots and seems to work just fine. I'm just wondering if I'm taking a performance hit since the ram are of different types. Is there anything I need ot do to make sure that they are running in Dual Channel?

From what I remember these systems run much faster with Dual Channel on than with it off.

 

[stardrek]

Only some NForce 2 (AMD) motherboards can run Dual Channel with 3 sticks. That doesn't mean that no Intel mother boards can, but I've never heard of one.

 

[RollWave]

Well now I have 4x512 its just that I have 2 different pairs. I knew that when i had 1.5gigs it wouldnt be dual channel, but now I have 2 gigs.

 

[stardrek]

I guess if you sync up the timings you can, but it is always recommended to have matched pairs. But yes, I am pretty sure you can.