The Xenon CPU is a custom processor based on PowerPC technology... at 3.5+ GHz. The Xenon CPU can issue two instructions per clock cycle...
Not much information here. Comparisons by clock speed don't work too well even within architectures, let alone between a PowerPC chip and an X86 chip. All I can say is not to let the clock speed startle you just yet, seeing as how the IPC is somewhat low.
The CPU includes three independent processors (cores) on a single die.
So you might -- just might -- see optimizations in the code for SMP systems.
The Xenon GPU is a custom 500+ MHz graphics processor from ATi.
The graphics card will be pretty much circuit-for-circuit an ATi R520, the exception being a noted lack of memory (see below).
Xenon has 256+ MB of unified memory...
After the video card has taken its piece, the thing has a sum total of 8k system memory.
Get ready for Pong: 360.
A look at what's being emanated from the horse's mouth largely confirms these specifications, with the exception of doubling the memory capacity, and adds a benchmark:
Overall System Floating-Point Performance: 1 TFLOP
This would seem to indicate to you that the system is processor-heavy, in comparison to PCs that get a couple dozen GFLOPS. You have been deceived. Console benchmarks of this nature include all system components -- not just the processor, as in PCs -- and thus effectively simulate what would happen if code used the graphics card to calculate the sum of 2.5 and 1.5. Also, this benchmark is on par with BogoMIPS in usefulness, seeing as how it only measures pure floating-point performance.
I would ask you to compare that figure with the Playstation 3's declared 2 TFLOP rating, but I digress.



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