Hey guys, just got my ASUS x850 XT PE in and man it is a beast. I used the cheesy ATI CCC Overdrive program and it overclocked it up to 594 Mhz Core and 648 Mhz Memory (it actually is a pretty decent auto-detect noob overclocking utility). I haven't noticed any artifacts and I'm actually surprised at how the x850 runs 3 degrees C cooler at idle than my x800 with IceQ II. The fan is a little louder but pushes a lot more air than the IceQ II, which is all I care about anyway. I might do some benchies later but right now really don't care.