I'm confused, when did we go from 9.2TF to 8TF?
8TF is the part of the 9.2TF rumor that gets swept under the rug.
The thing is for the 9,2TF rumor to exist, you have to clock a 36CU GPU at 2Ghz. Problem with that is that clocking a GPU that high would reduce your yields as most of your chips can't be locked at that clock as would typically be the case in consoles (making your chips more expensive) and the cooling solution you would need for that would also cost more.
Basically, if we are to take that leak seriously, then that must be the dev kit, and the console would be clocked at around 1.8Ghz, so you end up around 8.4TF.
Now the real crazy thing about that is that for that to happen(the 9.2TF thing), it would probably end up costing more building a console like that out than just putting in a bigger chip and using standard cooling.
But there is at least a silver lining, this could just mean Sony is aiming for a $399 box, or that for some reason sony lacks the funds to get a bigger chip instead. See? it makes sense in the end.