I made my way up in small steps 222,224,225MHz and i'm benching under 64bit debian since an hour without problems :confused:
Just left a watermark on the phoronix-suite with an 430s kernel build time
here.
Less than half the time all others got. :) (I'm the only one with a quadcore in there)
225MHz
Result
Gonna run memtest now and plan to find the lowest voltages for this setup this week.
EDIT: Ran a full memtest serie. Then booted into winxp and it froze during 3dmark06 install while priming. :( Enough for today.