According to various sources, the Geforce 8800GT also known as G92 will work at 600MHz for the core and 1.8GHz for the memory. The reference score for this card in 3DMark06 is 10,769.
Clocks might get a boost, but that depends on the performance of the Radeon HD 2950PRO. The Mobile01 web site posted a picture of the 8800GT card. You can see that the card has a single slot cooling solution.
The launch date for this card is rumored to be October 29th as we reported earlier.