It's true that nForce2 dislikes double sided chip && dual channel like what almostthere said, well at least for me too. I have 2 double sided DDR400 DT-D43 and i can't run them at 200FSB on my ASUS A7N8X-E Deluxe on dual channel, default timings. I might be able to obtain better FSB if i were to not run them in dual channel mode but the thing is, i can't find a way to disable it.