How to change memory bus mode?

[Mahesh Babu]

I'm currently running at 64-bit memory bus mode instead of 128-bit memory bus mode (which my DIMMs support) so how can I make that change?

[siriusb]

What u need are two memory sticks in the right slot to make dual channel (128) work. Refer to ur mother board manual to see what memory are supported and which banks to insert them into.