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The processor is but is the rest of the architecture 64 bit? Here are the technical specs from the Mac Pro.

Processing
Two 2GHz, 2.66GHz, or 3GHz Dual-Core Intel Xeon 5100 series processors
Intel Core microarchitecture
4MB shared L2 cache per processor
128-bit SSE3 vector engine
64-bit data paths and registers
Lower power optimization
1.33GHz, 64-bit dual independent frontside buses

The iMac doesn't have any mention of 64 bit. Again...might be out in left field here.

Thanks,

darren

What would be the point of putting a 64bit chip in a 32 bit architecture!?
 
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