What specs are you working off? I only ask because I see varying reports on the specs, for example, one report states that the 9800GTX will be different architecture to the G92, it will use the 55nm fabrication proces, it will have twice the shader processors of the current 8800GTS, it will have 32 ROP's (as opposed to 16), it will have 50% more TMU's, have a 512bit memory bus and have more than double the transistors.
Whether that happens or not, your guess is as good as mine, I suppose my point being, I am not convinced either way about this card and wont be until someone gets a pre release sample and put's it through it's paces but if it works out as some people think as a G92 8800GTS + 20% I too will be very disappointed, when I get home I will post the link in here to the predicted specs for the 9800GTX G100.