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Yeah, the math doesn't add up. The total of the top 100 miners barely approaches 60PH so I can't see how the remainder could add up to another 90PH or so.
I see it listed as around 85PH elsewhere which would be a lot closer to the stats on the site.
As he stated in his own thread, ckpool gets the pool hash rate wrong.
That's also what I said here before, it was over-reading the pool rate by something like 5%
The Pool shift graph shows it correctly - but he doesn't keep the actual share information to be able to do that (or any necessary tests on share data)
With the new faster server here, it's showing correct now, so it might be an under powered server problem, though I'm not sure.