It’s hard to know how much stock to put into these figures, given that they’re a) on a forum and b) anything but official, but these specs over on NeoGAF at least point to some level of reasoned guesswork.
The poster cites “insider information” from a couple of places, so whilst it’s clearly not concrete (or final) this info should at least prompt some discussion.
The next Xbox, so the post says, consists of a 6-8 core AMD CPU and between 3 and 4 GB of RAM. An AMD GPU rounds off the stats, which together kicks out 1-1.2 teraflops.
The PS4? An AMD CPU with 4 cores, an AMD GPU 1150 SPU, and just 2 GB of RAM, which is “unlikely” to be upgraded. This combo dishes out 1.8 teraflops, apparently.
The truth is that the official details of the next generation of consoles isn’t known by anyone outside the platform holders themselves, but it’s fun to speculate; we’ll see soon enough hopefully.