Groucho said: The SPUs can, and frankly they can run general purpose code, that doesn't involve accessing large tracts of memory (which is a big deal), just as fast, or in some cases faster, than the 2 hardware PPU threads can. |
That's not true. There are some specific ways in which the SPUs are inherently slower than the PPU, for example double-precision arithmetic.
Do the math and you can see the PPU is 3.5 times faster than the SPU at that.
Source:
http://www-128.ibm.com/developerworks/power/library/pa-cellperf/
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