lol, i didn't do any tweak, pi is slow 'coz of memory clk is low.
and i can't enable 1T at such clk

tbh, bottle neck is the FSB, i have no idea why i can't clk fsb>233mhz
and with fsb=225, i can't set ddr2-1066, system will freeze during post.
but i'm pretty sure my memory can stable at ddr2-1200+ .