Originally Posted by fateswarm iGPUs and APUs are not performance machines though.
We all know now they are either replacements of low performance or play the role of co-processors (e.g. NVIDIA's 20nm GPU using a general purpose co-processor, or an Intel i7 user accelerating their video decoding only).
For real performance, discreet chips do the best job now, and we don't have it yet, a board with common VRAM/RAM and a slot for a CPU and a slot for a GPU would be more like it, something like how PS4 was designed, in theory at least.
Oh, I agree, at least for the time being. Kaveri is rumored to have a cut-down 7790 (GCN 2.0 but has around the same cores as a 7750 or 7770) which, while not bad, isn't great by any means. However, HSA is supposed to open up parallel processing using that iGPU, even if you do have a dGPU or two or four. This means that the setup is similar to a rig taking advantage of PhysX: a CPU performs the main calculations, a GPU renders graphics, and the PhysX card (in this analogy, the iGPU) runs parallel physics calculations. Technically FM2 already has a shared RAM pool. An A10-6800k performs noticeably better than the similar setup of a DDR3 6670 and an FX-4300 because of that, 30% IIRC. I'm not sure we'll get PS4-like PCs, since splitting the market into DDR# and GDDR# for system memory would be difficult and impractical, though I could maybe see an additional, specialized RAM slot for a GDDR module.