I would like to know how X360 CPU is even close to PS3 Cell.
Xenon's performance bare minimum is 19.2 GFlops (3 cores x 2 FP units per at 3.2GHz). Theoretical max is 115 GFlops.
CBE's performance bare minimum is 92.8 Gflops (7 SPEs with 4 FP units per, and one PPE with 1 FP unit per, all at 3.2GHz). Theoretical max is 204 GFlops.
Recent tests by IBM show that the SPEs can reach 98% of their theoretical peak performance using optimized parallel Matrix Multiplication.
204 * 98 = 199.92 GFlops
Conclusion: Cell is at least 73% more powerful than Xenon.
As I have posted in another thread:
Reality Synthesizer:
550 MHz
256 MB GGDR3 700 MHz
+300 million transistors
24 parallel pixel-shader ALU pipes
27 floating-point operations per pipeline, per cycle
8 parallel vertex pipelines
10 floating-point operations per pipeline, per cycle
27 * 24 * 550 = 356.4 GFlops
10 * 8 * 550 = 44 GFlops
PS3 total = 400.4 GFlops
Xenos:
500 MHz
Unified memory (10 MiB daughter DRAM embedded in 65nm process)
48-way parallel floating-point dynamically-scheduled shader pipelines
232 million transistors
Unified shading architecture (each pipeline is capable of running either pixel or vertex shaders)
10 floating-points per pipeline per cycle
10 * 48 * 500 = 240 GFlops
X360 total = 240 GFlops
Conclusion: RSX is at least 68% more powerful than Xenos.
But in orded to be fair, comparing only floating point abilities of a system is a one-dimensional and application-specific metric. Just pointing some errors out there.
