Advanced Micro Devices Inc (AMD)

[pgerassi]

Wbmw:

But HDR/SM3.0 3DMark is an extremely easy parallel load, one that can be loaded with 1600 stream processors, 40 texturing units and 16 ROPs. And that load is far more than 100 EE C2Qs can do at the same performance of a 4870x2. Windows at idle still has to redraw the screen at 60-120 FPS with effects. That load is not that serial either. So Amdahl's law doesn't apply very much. And that is quite standard for GPU type loads. Besides, if the vertex or shader program was completely serial, its applied to each vertex or pixel and how many are on a screen? Far more than 1600. Thus Amdahl's Law doesn't apply. If you didn't know that, you have no business posting about performance, absolute, per watt or per dollar.

Besides you have to prove that an EE C2Q including chipset and memory on a totally serial task uses 1/200th of the energy per task completed of a 4870x2 card. Do know that even on a totally serial task that the 4870x2 runs at 750 million instructions per second, lets see that a EE C2Q core even getting 75 billion instructions per second. Or even with the power difference at that serial task. I extremely doubt that an EE CPU on a totally serial load would have even 5 times the performance of a 4870x2 at less than 1/20th of the idle power of the 4870x2 or about 5W total system power (EE C2Q CPU, memory, chipset, VRMs, etc.). Given that, you made a silly conjecture. Typically silly as was your previous post.

Pete