Sun's not very contrarian thinking

Since Sun seems to be treating the launch of their new T5x20 servers as the second coming (and it is, of Niagara, that is), why haven't they done the logical thing and proposed a Niagara/ClearSpeed combo?

Various reasons indicating such a combination would be in demand include:

1. Power usage
   Since the ClearSpeed boards have approximate power consumption of 25-33 Watts (depending on model), adding two of the PCIe-8x boards to a a T5220 would only increase power usage by 66W with an aggregate 133 GFLOPS increase in computing power. Sun obviously believes stuffing ClearSpeed boards into their servers are a valid play: TIT's Tokyo Tech's TSUBAME cluster achieved a 24% speedup for a 1% increase in power usage.


2. Floating Point performance
   Real World Tech's excellent article posits that the floating-point ratio in the instruction mix on the first Niagara iteration could exceed no more than 1%-3%. Clearly, the demand for floating point was sufficient to increase the resources dedicated to it from 1 FP unit per chip, up to 1 FP unit per core. Presumably further FP acceleration would be even more beneficial.

Of course, Sun might have more than a little trouble with the integration. Perhaps they might have more luck hooking up some ClearSpeed X620s into a Thumper...