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For the Xbox 360:
The CPU has a theoretical maximum performance of 19.2 GFLOPS. (3 cores x 2 FP units per @3.2GHz)
The GPU has a theoretical maximum performance of 96 GFLOPS. (48 stream processors, each capable of handling a 4-wide FP vector calculation, @500MHz)
The total of the two is 115.2 GFLOPS.

For the Playstation 3:
The CPU has a theoretical maximum performance of 92.8 GFLOPS. (7 SPEs with 4 FP units per, and one PPE with 1 FP unit per, all @3.2GHz)
The GPU has a theoretical maximum performance of 105.6 GFLOPs. (24 pixel shader units with 2 4-wide FP vector units per, @550MHz)
The total of the two is 198.4 GFLOPs.

What about that objective and factual look? UH?

Seriously X360 Xenon 115 GFlOPs 2 times better than a $1500 extreme core duo? Release back in 2005? Fail haha. That guy post a lot of links about PS3 and just say "X360 proven 115 GFLOPs" WTF?