interesting approach simply lower vcore and up nb/vnb if settings dont work well i can see phenom clocking is very different from x2 clocking..

but regarding nb/htt speeds interestingly its the same more or less with x2: cpu clocks lower then htt clock do not work, i experienced this behaviour with crystal cpuid...

there, htt variability is strongly correlated with cpu variability in clockspeed.. if htt clock jumps up a few 1/10mhz, cpu clock will also..