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Captain_Tom on 18 June 2013
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Scoobes said:
Netyaroze said:
Scoobes said:

Where are you getting your numbers from?

RSX was 176 GFlops.

Cell was 12.8 for each SPE so 12.8 x 6 (6 SPEs available for games): 51.2 GFlops

Total = 227.2 GFlops


RSX 

 

http://www.ps3devwiki.com/wiki/RSX

 

  • Floating Point Operations: 400.4 Gigaflops ((24 * 27 Flops + 8 * 10 Flops) * 550)
Nvidia said this btw.
CELL

. PlayStation 3's Cell CPU achieves a theoretical maximum of 230.4 GFLOPS[3] in single precision floating point operations and up to 100 GFLOPS[4] double precision using iterative refinement for the solution of linear equations.

OK, so I made a mistake on the Cell processor. I was thinking of double precision floating point performance for some reason. Even then, with only 6 SPUs available to devs it comes to 150 GFlops (6 x 25 GFlops). The theoretical 230 GFlops numbers is for the full 8 SPE Cell processor (I'm guessing the PPU contributes 30 GFlops so 180 GFlops total?).

As for the RSX, I'm not sure I believe that figure, partly because it comes from NVidia and is likely just marketing tripe, partly because the 7800GTX never topped 200GFlops (so 400 is absurd considering the similarities) and partly because in the same wikipedia link above is a link to the RSX article that states it's 176 GFlops (http://en.wikipedia.org/wiki/RSX_%27Reality_Synthesizer%27).

I based my math based on what card the PS4 is close to in performance (Actuall real world performance), and then compared that to the specs of the card in the PS4.  It is like an HD 6450 Vs. a 7870.  That is as big of a difference as I said.