Did the Vcore mod and upped it up to 1.48V so far. Still running with the tiny default cooler

Dothan 1.5G @ 2571MHz, Superpi1M => 30sec
Maxed out the mobo FSB (so far) w/ this one. Chip would have gone higher.

Dothan 1.7G @ 2608MHz, SuperPi 1M => 30sec
PiFast33 => 20.63
Hexus PiFast => 47.19
3DMark2001SE @2515MHz, X800XT PE stock => 28261

The 1.5G did 5Mhz better than the 1.7G w/ default volts/cooler. OVP kicks in at ~1.5V Vcore. Higher Vcore would still give a nice boost for those clocks. But I think that a chip w/ higher multiplier is needed if I decide to up the Vcore and add some better cooling.
At the moment the 1.7G is running at 2.2G 1.25V w/ passive stock heatsink (case fans take care of airflow) - max temp so far +56C (after looping the new crytek demo).