Hi, my Phenom II X4 B35 is currently sitting on 250mhz x 14=3500mhz. If I up the FSB speed my RAM speed goes up too, thus far I know. My Ram is 2x2Gb DD3-1333mhz. Available FSB/DRAM ratios in my bios are: 1:2, 1:2.66, 1:3.33, 1:4. SO, should my FSB be only equal to 667/2 (333), 667/2.66 (250), 667/3.33 (200), 667/4 (166)? 667 cause of Double Data Rate. How much of a difference in memory speed can Ram tolerate? If I choose FSB to be 270mhz, at 1:2.66 ratio that would be 270*2*2.66=1436.4mhz. Can it run? Is this when you should increase DRAM voltage? Thanks.