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Topic: Huge difficulty spike after Halving -- coincidence? - page 2. (Read 5821 times)

sr. member
Activity: 285
Merit: 250
How does this always happen when this is the first time it's halved?


YOU ARE AN IDIOT!
hero member
Activity: 778
Merit: 1002
How does this always happen when this is the first time it's halved?

How many times has it NOT happened?
donator
Activity: 1731
Merit: 1008
The increase in difficulty started before the halving. The halving was supposed to be at 1pm, and it got pushed up 3 hours overnight.

I don't think it's ASICs, it's people turning on their dusty miners for a shot at history.

Many people will continue mining in spite of non-profitability. Some do it because they believe in bitcoin, others because they believe bitcoin price will rise and justify their actions (this is actually wrong because they could instead just buy some bitcoin if they think price will rise). Meanwhile, on the price side of things, you can really only expect it to rise at most at a rate that would eat through the order book at half the average volume.

I do both, I mine and I buy because I know BTC will rise in price... better than buying stock.. IMO...

What do you do for diner ?

/Seriously,  Do you really think a sufficient number of miners care much about finding the last 50btc block to affect hashrate in any visible way ? It has very little historical value, the chance of finding is extremely small, It require that you mine Solo,  90%+ of miners don't.  GPU mining is still profitable for many, but it as not profitable enough to restart a mining farm for less than a day.
hero member
Activity: 588
Merit: 500
firstbits.com/1kznfw
The increase in difficulty started before the halving. The halving was supposed to be at 1pm, and it got pushed up 3 hours overnight.

I don't think it's ASICs, it's people turning on their dusty miners for a shot at history.

Many people will continue mining in spite of non-profitability. Some do it because they believe in bitcoin, others because they believe bitcoin price will rise and justify their actions (this is actually wrong because they could instead just buy some bitcoin if they think price will rise). Meanwhile, on the price side of things, you can really only expect it to rise at most at a rate that would eat through the order book at half the average volume.
sr. member
Activity: 392
Merit: 250
1. If it were just BTCguild's luck, it should be leveling off at some point. Instead, the estimated next difficulty just keeps going up.

2. If it were just ex-miners firing up their rigs for old times sake/to find the last 50BTC block, they must be leaving them on for a while longer.

3. As for "some people don't realize GPU mining isn't profitable anymore", that wouldn't explain an INCREASE in hashing power. It would only explain hashing power staying the same.


So we still don't have the answer.
donator
Activity: 1731
Merit: 1008
I have really cheap energy 0.07Kw/h and I will continue mining.. my goal is long LONG term so I dont care about halving.. I care about hoarding...but eventually, when 2Ghash make less than .20 BTC per day, then I might upgrade to sopmething different...
Smiley
So you're the cause of the spike ? Good to know.

Seriously, There was ~18 block in the time it's supposed to take for 9, this could be an extra ~20ghs in a relatively small time span.
legendary
Activity: 1750
Merit: 1007
If you look at blockchain.info before the reward halving, you can see where a lot of that spike came from.  Bitminter and BTC Guild both had especially nice runs of luck for about 12 hours preceeding the change.  BTC Guild's luck alone would have been interpreted as a ~2-2.5 TH/s increase in overall network speed for those 12 hours, and even a few hours after.
donator
Activity: 2772
Merit: 1019


I'd say it's significant. Assuming ASIC-testing.
hero member
Activity: 1078
Merit: 502
I have free power.. Friend of mine hosts my rigs at his apartment.
hero member
Activity: 728
Merit: 540
This always happens when the reward halves... so far at least.

FTW
legendary
Activity: 1484
Merit: 1026
In Cryptocoins I Trust
Anyone that doesn't frequent these forums probably doesn't realize that GPU mining is not profitable anymore.

It might take a month or so for people to figure it out and sell their rig or mine ALT coins instead.

And of course there are the free power people, who I imagine will continue GPU mining until their GPUs die. But, I can't imagine there's a whole lot of these types.
hero member
Activity: 1078
Merit: 502
How does this always happen when this is the first time it's halved?
hero member
Activity: 602
Merit: 500
This always happens when the reward halves... so far at least.

I laughed.
hero member
Activity: 778
Merit: 1002
This always happens when the reward halves... so far at least.
hero member
Activity: 1078
Merit: 502
That fact that a lot of people powered up their rigs to specifically try and mine blocks #209999 & #210000 could also have had a part in this.


I think this is what happened... Lots of people turned on to finish the 50BTC blocks...
sr. member
Activity: 392
Merit: 250
This always happens after a difficulty change.  Check back in a few days.

I am well aware of what happens after a difficulty change; I've been mining Bitcoins since May 2011  Wink

We didn't just have a diff change though. Yesterday's numbers were perfectly normal.
hero member
Activity: 882
Merit: 1006
That fact that a lot of people powered up their rigs to specifically try and mine blocks #209999 & #210000 could also have had a part in this.
sr. member
Activity: 257
Merit: 250
Not trusting third parties with my private keys
This always happens after a difficulty change.  Check back in a few days.
sr. member
Activity: 392
Merit: 250
The short term network hashrate is always volatile.  A change of 3TH/s, 5TH/s, or even 10TH/s isn't particularly meaningful.

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

Now if over the next 3 days the 3 day moving average increases by more than say ~2TH/s you might have something other than just noise.

I don't know... that 3-day moving average line seems to be spiking upward. Unless it crashes down REAL fast in the next half-day, we're looking at an increase of network hashing power.

This is especially strange because I expected the total TH/s to slow down a bit, if anything.
sr. member
Activity: 322
Merit: 250


Re:  Variance.  True.

But.


FPGA shipments have been completed.  Anyone purchasing GPU's right now is not acting rationally.

Turning on already purchased GPU to offset heating bills is plausible.  I would be surprised if such practice would account for more than 1 TH.


A sustained multi TH increase would be very odd given the environment.
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