pApA SmerF01
27-07-2005, 11:02 AM
:cheers: :albertein Grindstone wanted me to make another thread detailing the actual TFLOP count (or what i have mathematically calculated) for each system:
the ps3, original statements from sony and fanboys alike put their total system floating point operation count at 2.18.
the only problem with that 2.18 number is that they are counting the impossible idea that their machine is working at 100%.
the real numbers break down like this:
70% of the FLOP count comes from the gpu. the nVidia G70 gpu can (since it isn't usa) only run at best 70% efficiency, so you have to divide into that 2.18 number the difference and then subtract. but don't forget to put about .17 latent (idle, like an inactive volcano) for efficiency and if something goes wrong.
so 70% of 2,180,000 is....1,526,000. now you take that number and subtract 30-50%, depending on how much you trust sony....
i'm taking off 40% which means 60% efficiency...the total number to take off is 610,400. so 1,526,000 - 610,400 is...915,600. now add 654,000 from the cpu and buffering chips you get the "actual" count...
1,569,600 is the count that you get for this modest equation. not 2.18 TFLOPS. plus you have to leave a certain portion latent. so anyone who brings up the TFLOP argument, here's the equation (simple math) to find out the real count.
to talk about efficiency as an absolute is a farce. it's simply impossible to achieve 100% efficiency on any level of engineering. even the xenos processor is at best 98% efficient. any device mechanical or electronic suffers parasidic losses through its own operation. to claim 100% efficiency, you're basically chasing perpetual motion. :tee: :albertein
the ps3, original statements from sony and fanboys alike put their total system floating point operation count at 2.18.
the only problem with that 2.18 number is that they are counting the impossible idea that their machine is working at 100%.
the real numbers break down like this:
70% of the FLOP count comes from the gpu. the nVidia G70 gpu can (since it isn't usa) only run at best 70% efficiency, so you have to divide into that 2.18 number the difference and then subtract. but don't forget to put about .17 latent (idle, like an inactive volcano) for efficiency and if something goes wrong.
so 70% of 2,180,000 is....1,526,000. now you take that number and subtract 30-50%, depending on how much you trust sony....
i'm taking off 40% which means 60% efficiency...the total number to take off is 610,400. so 1,526,000 - 610,400 is...915,600. now add 654,000 from the cpu and buffering chips you get the "actual" count...
1,569,600 is the count that you get for this modest equation. not 2.18 TFLOPS. plus you have to leave a certain portion latent. so anyone who brings up the TFLOP argument, here's the equation (simple math) to find out the real count.
to talk about efficiency as an absolute is a farce. it's simply impossible to achieve 100% efficiency on any level of engineering. even the xenos processor is at best 98% efficient. any device mechanical or electronic suffers parasidic losses through its own operation. to claim 100% efficiency, you're basically chasing perpetual motion. :tee: :albertein