Quote:
Originally Posted by ATH
Long ago I calculated 1 Ghzdays to be ~ 171 TeraFLOP (Not FLOPS)
Post #7 and #25 in this old thread:
http://www.mersenneforum.org/showthread.php?t=10235
Now we can calculate it more easily from here:
https://www.mersenne.org/primenet/
Under "Aggregate Computing Power"  "Today, last 24 hours" we can see that:
123137 GhzDays = 246.275 TFLOP/sec * 86400 sec = 21278160 TFLOP =>
1 GhzDays = 21278160 TFLOP / 123137 = 172.8 TFLOP
We can test "last 7 days" and "last 30 days" to see if we get the same results:
994150 GhzDays = 284.043 TFLOP/s * 86400s/day * 7 days =>
1 GhzDays = 172.8 TFLOP
4395208 GhzDays = 293.014 TFLOP/s * 86400s/day * 30 days =>
1 GhzDays = 172.8 TFLOP

That number, 172.8, is not a coincidence: it is in fact exactly (24*60*60)/500, which is another way of saying that 1 EGHz (1 [Core 2] Equivalent GHz, = 1GHzday/day) is exactly 2 GFLOPS. Not sure which unit is defining the other, but that looks like the definition used by PrimeNet. Does anyone have an old Core 2 lying around?
So a 100 EGHz CPU (?? GPU?) is doing 200 GFLOPS according to the PrimeNet definition of EGHz and FLOP. I'm not sure how these line up to an actual Core 2 or to the "standard" definitions of FLOP.