Quote from: philipma1957 on August 04, 2016, 01:47:32 AM

400ph older then the s-7
and 800ph s-7 avalon 6
which is 1200ph

300 to 500 ph of s-9 less accurate.

The problem is this adds up to 1500-1700 ph, which is current hashrate. No significant shutdown of mining equipment after the halving so far, maybe up to 200 ph already shutted down after the halving (mostly last week drop), but was replaced by new equipment pretty quickly (bitmain not selling to public does not mean they stopped the production by waiting for new chips, there are always private deals possible or bitmain mining farm), plus most of the unprofitable equipment has to be sold and new buyer must be profitable (free or 1-2 cent electricity cost). So I would not expect much bigger drop anymore, maybe few more similar slightly negative % periods this year.