Ok, seems like it would be the correct thread. How exactly would i find out if my motherboard supports Memory Interleaving? Probably trading in my current 1GB (2x512) Cas 2 DDR400 for either 2 sticks of 512MB Cas 2.5 DDR400, or 4 sticks of 256MB Cas 2.5 DDR400 (more likely this one if my mobo supports memory interleaving). can't OC with this RAM if my life depended on it. seems like if this ram ain't running at EXACTLY 400Mhz, it won't work and throws a hissy fit.