It's the original Neo leaked thread. Should be able to find it in a search.
I just looked it up and finally found the information! So Osiris mentioned that Sony was considering two different models of the NEO. One with the same CPU (albeit faster) at 4.2 TF, and one with a different CPU at 5.5 TF. There were numerous mentions that the 5.5 TF option would be $500 or more. I don't see that happening.
Keep in mind it is a machine aimed at getting games to 4K. That is the only confirmed thing we do know. Will 4.2TF be good enough?
We'll have to wait and see how much power Sony thinks it needs to make a justifiable difference.
Well lets talk about that a bit. Saying that NEO is a machine aimed at getting games to 4K doesn't necessarily tell us much about the power Sony is going for. The Xbox One S can display games in 4K (albeit upscaled, not native) and it is barely more powerful than the regular Xbox One.
I'll admit I haven't had a ton of time to research the nitty gritty of how the hardware that PS4 and Xbox One use works. Based on what I do know, the latest NVidia cards have some trouble with 4K gaming at 30FPS. Even with all the optimization that takes place for console games, can 4.2 or even 5.5 TF get 30FPS at native 4K on console? I know we're getting into theoretical territory here but I'm curious.