I know the nforce 2 is the fastest and best, as long as you run dual channel. But I don't have $160 to get 2 sticks of some decent 512mb pc2700 or $200 plus to get some corsair pc3200. I do have lots of 256mb sticks of samsung and infineon pc2700 ram, and rather have them stacked to 512mb ram (better overall performance) instead of 256mb of dual channel ram. Should I go kt400?