Bitcoin Forum

After peaking to 228 Th/s now it's down below 189 Th/s. Anyone know why??

"Hashrate" is always really estimated hashrate.  Finding blocks is a random process with fairly high variance.  Based on the rate of blocks found and the current difficulty, the hashrate of the current network of miners is estimated, and usually averaged over a time period.

TL;DR: There is variance, this is normal fluctuation.  There was not a mass exodus of hashpower.

That makes sense, it just seemed like more of a drop than we've seen to date, but that could just be stochastic fluctuation.

The variance of the hashrate grows linearly with the total hashrate: https://bitcoil.co.il/pool_analysis.pdf

http://bitcoin.sipa.be/speed-lin-2k.png

The 8-hour windows appeared to spike up to 300TH/s on the 11th, but look at the 3-day average. It seems pretty stable, around 220TH/s.

Thanks all, that's sorta what would be expected, the greater the hash rate the more the variance. It's the medium and long-term trends that are the best picture of the landscape.

What are your fave stats/analyst sites for BTC number crunching and meta-analysis?

http://bitcoin.sipa.be/ is the only site I trust for accurate hashrate charts. They show hashrate, and % growth per day in their different charts. Taking a 30 day average usually eliminates a large chunk of variance, so it's pretty accurate.

For earnings prediction, http://www.bitcoinx.com/profit works pretty good.

I was actually wondering the same haha

Thanks for answering it guys ;)

People switch their rig, especially GPU array to another crypto.If in bitcoin case.

Additionally, some Accelarators are out of order during operation

Just make sure you bump up the starting difficulty to account for what it may be by the time you actually have the hardware in hand.

Power issue as The ratio of power and performance is bad, so it is.