I am currently running 2x256 mushkin 3500 Black lev 2 at 2-3-2-6 on my nforce 3 a64 board, and I wanted to upgrade to 1 gig. However I only have 3 dimm slots so I need a 512 stick of black level 2 in order to match the rest. Problem is I cannot get a hold on a single 512 mb stick… Should I just suck it up and get black level one, or is that really detrimental to my overall performance + timings?