I have an a7v133 and have recently purchased 256 meg of cas2 pc133 on 1 stick, Previously I had 2 x 128mb of pc133 in the board. The question is do I go with 512 meg and run @ cas3 or use the 256 at cas2 ? I do a lot of photoshop/pro-e/autocad so lots of memory could be a good thing, also I am unsure of having all 3 slots populated in the board is this good or not ?