Insider: Dp= y. But 3.2/4.2tf is only the theoretical performance not the actual figures... Oban and the design of the cpu/s gpu/s .. are the equivalent Theoretical bandwidth. Oban is designed as the enhancement "change". As where sony has sp which is all most preferred over Dp. Because of read wright error's due to memory problems, but all this can really come down to a pc environment, as pc have to go via old style of bus and memory interconnection. Also the memory is not going to be utilized 100% due to no specialized memory controls. As kryptos has a way more advanced memory controller and accelerator, so double precision will not see the same problems. also gpu shader core threads are not 768.. as these cores can do two threads each which is equal to 2,304threads and at 100% utilization. Pc gpus and cpu use about 50/60% of there max capability, due to OS requirements and without a closed design it is unable to have a level of optimization like a closed set of hardware.
<Make sure you keep digging... and double check every thing I just sent you.. I am 100% sure it checks out. :)