How high of a clock with x1800xt?

[jelly1228]

I just ordered a x1800xt and a new mobo, I was wounder how high of a overclock I can be looking and on that x1800xt. Im new at video card clocking, tryed to clock my x800xt and as soon as i hit any thing over 506mhz it would crash. I was using ati tool. I would like to hit speeds of x1900xtx. Let me know what you think.

 

[RichPLS]

Using ATI's video drivers, it should clock to the max at 690MHz/1600MHz...
mine does