Yeah Something like only being able to increase the multiplier to 14. How can you tell between the tbred a and b? I may have the b since currently I have the speed at 1957mhz. So far I have to lower thew clock speed to 130 and increase the voltage to 1.7 . Any crashes the occured have been cause of the crappy saphire radeon 9000, cannot do the 3dmarks worth a flip. The CPU temp so far is about 56 celcius with the vol 9 fan. Just wondering on how high I can crank to voltage on this puppy without toasting the chip. My barton 2800 can fly high at 2.8 ghz but this thing is being a beyoutch.