I know the PS3 uses 3 Cell processors. What I'm not sure of is are they full general CPUs or are they specific in function or somewhere inbetween?
There is only one CELL processor in the PS3. The CELL Processor has 8 'cores'. The main one, the PPU, is the same as one of the three cores in the Xbox360's Xenon CPU, the remainder 'cores' in CELL are weaker units called SPUs. Also I think the CELL PPU can only execute a single thread*, but the Xenon CPU cores can each execute two threads*
CELL probably isn't suited to running an OS unlike Xenon which runs some cut down version of a Microsoft OS already seeing as Xbox uses DirectX and standard ATI graphics controller. Also CELL is much more expensive to produce than Xenon for IBM. Neither are as powerful as an i7 but still Xenon is the ONLY CPU any one thinking of designing an OS4 compatible motherboard should be looking at, there is no excuse for G5 OTT priced or G4 underpowered stuff from the mid 00s
*never trust the internet