Out-of-order, base architecture is from 2010, 28nm fabrication process, has some performance/complexity tradeoffs to reduce power consumption and die size (down to 3.1mm^2 from 4.9mm^2) as Jaguar is designed to give tablets a big performance increase, more instructions than previous low-power models (SSE4.x, hardware AES and more), increased floating-point performance over Bobcat, and AMD claims ~15% instructions-per-clock gains over bobcat.
So from the Jaguar architecture, AMD is building two main cores.
- Kabini is for the desktop market and there's already model specifications out there, all with "AMD HD 8xxx" GPUs integrated. The 8xxx series supports Directx 11.1, OpenGL 4.3, and OpenGL ES 3.0 (insert Dolphin mention here). The current models do not have Turbo enabled, though Jaguar itself supports it. TDP is 9-25W.
- Temash is the second core built off Jaguar, and created for low-power environments. TDP is 3.9-9W, one of the publicly-available models will have Turbo (can clock up to 1.4ghz from 1.0), and Temash can be dual or quad-core.
And here's the chart most people have more interest in...
The architecture used currently clocks up to 2.0ghz, most rumors point to clocks of 1.6ghz for both the PS4 and XONE. The PS4 and XONE seem to have similar or even the same CPU specs, but as we've already heard the PS4's going to be using way-higher-clocked RAM, and 50% more GPU cores.
If we knew the specs for the various AMD HD 8xxx cores then we could possibly figure out the closest CPU models for the PS4 and XONE and fill in the missing specs on both sides, but that info doesn't seem available just yet as the cores only commercial launched yesterday, it'll take time for the CPU-Z and GPU-Z databases to mark all the exact differences between the models... and that also assumes that the PS4 and XONE would be using the integrated GPUs and not a separate dedicated chip (the XONE motherboard appears to have no expansions cards so the GPU is either the on-die CPU one or somewhere else on the motherboard).
Also for anybody that's still holding out hopes for 360 BC on the XONE...
The move away from PowerPC to 64-bit x86 cores means the One breaks backwards compatibility with all Xbox 360 titles. Microsoft won’t be pursuing any sort of a backwards compatibility strategy, although if a game developer wanted to it could port an older title to the new console. Interestingly enough, the first Xbox was also an x86 design - from a hardware/ISA standpoint the new Xbox One is backwards compatible with its grandfather, although Microsoft would have to enable that as a feature in software - something that’s quite unlikely.
Also here's my obligatory "Consoles are just pre-setup desktops with a locked OS" line.