(The CPU is Bottlenecked) By the DX API because it cannot process for the Drawcalls the CPU can calculate, so while The GPU usage is dropping through lack of CPU performance, its not the CPU 'sitting on the other side of the DX API' that is the problem, its the API getting in its way.
Timothy Lottes-
As a PC guy who knows hardware to the metal, I spend most of my days in frustration knowing damn well what I could do with the hardware, but what I cannot do because Microsoft and IHVs wont provide low-level GPU access in PC APIs. One simple example, drawcalls on PC have easily 10x to 100x the overhead of a console
AMD aka IHV, have now supplied Mantle-the low-level GPU access API for the PC platform that Lottes and many more have screamed out for.
Lottes is Nvidia through and through, considering he works with Epic who are heavily involved with Nvidia, is he talking animal waste too???
The Starswarm STRESS test, is NOT a BM, it's main design was to showcase that Mantle removes DX limitations and what it brings for AMD gpu's, NOT to gimp DX on both vendors-nothing more, nothing less.
Core/GPU usage on DX is low because the DX API CANNOT push the data through remotely fast enough, where as Mantle can.
The sheer amount of fud in here is incredible, because you can't see past the colour of your gpu and/or because your gpu isn't supported.
The amount of anger from Nvidia users when PhysX(wrongly) gets slated, is justified imho, pity the same users who displayed such anger are giving it back in spades, poor, very, very poor.
