lowering your ht from 4 to 3 will almost definitly increase your overclock. Lowering multipliers may increase your maximum fsb but wont increase your maximum clockspeed, so if your memory can go higher then your processor using a lower multiplier makes sense ex with 2.7v my memory has problems over 430 at 2.5-2-2-10 (with 2.8 or 2.9 I can go much higher), so I am running my dtr 3200 @ 9 * 258 for a clockspeed of 2322 and a memory speed of 429.6mhz (memory is set to 333 in bios). If I left memory at 400 and multiplier at 10 i would hit a wall around 218+- so changing memory settings and multiplier allows me to maximumize my overclock. Assuming asus can get a fix and give us more memory voltage i will be making some major changes to those settings, but for now they are pretty good.