ATI's RadeonX1900 GT to cost $350

We might have assumed that the X1900 GTO would be clocked at 500/1000MHz, but this won't be the case. Instead, the X1900 GT is clocked at 575MHz for the core and 1200MHz for the memory.

So, as it turns out, the X1900 GT is R580-based is pretty much a renamed GTO with a better specification that we all expected.
http://www.theinquirer.net/?article=31304