A few minutes of research shows that in the past few weeks the block reward is generally 25btc + ~0.2btc in fees. (around 1%).

If bitcoin grows in popularity over the next 6 years, the 2020 halving will reduce block reward to 6.25btc + ~0.8btc fees (4x the fees of today due to much higher transaction volume). That's now over 15% of the miner incentive coming from transaction fees.

Of course this is a lot of speculation regarding volume, but it shows the idea of fees eventually funding the miners

My favorite thing is that a bitfury system from last September continues to churn out bitcoins at ~1.2w/gh profitably. When I bought the device almost Noone expected it to be profitable past 6-9 months of use.

I have some in the toronto area. $60/s1 or $45/boards only (including controller). Plus shipping

seems odd that 5 boards would not work at all - are they powered by a seperate psu, or any other commonalities between them? One or two boards simply not working anymore would likely be an issue with the DC/DC regulator or the individual controller. But 5 board at once seems like a cascading issue across the boards to make them all stop.

if you have a multimeter check the voltage. look for 12V and ~0.8V presence from the inductor or capacitors. If either is missing it narrows down the problem

Ive run 3x S3 units (not s3+) on a corsair 1200W without problem, but its pushing the limit. I now only run 2 on it though.

the reason? ATX GOLD supplies like it tend to be most efficient at 230V and ~70% load. At 90%+ load the efficiency drops from 92-93% to 85-88%, which adds up over time.

this is true only if difficulty growth continues to outpace Bitcoin price. If the Bitcoin priced moved to $750 (+100%) in the short-term while difficulty only grows +50% then there will be two effects:
1) mining at higher power draws or with >1w/GH equipment will immediately be profitable to run for most people, even if electricity is ~$0.28/kwh or more
2) miner prices are cheaper because what now costs 1BTC ($375) to build and ship will only be 0.5BTC or less

granted - I expect that almost all but hobby mining will be centralized very soon, wherever electricity is cheap or cool air is abundant. That's just a natural outcome as Bitcoin becomes a competitive technology and companies like Bitfury intend to operate over 100MW of equipment

Try changing the order of the ribbon cables, or plugging the pi it to unit 4 (with 5-8 chained to it) to see if the issue is in common or an error on board 4 meaning 5-8 don't communicate through it normally

Usually it's when something about the setup (the pool, the hardware, the Web connection, w/e) is inconsistent and causes the hashrate to drop or chips to be 'x' out after a few minutes or hours of operation. Reboot clears the problem until they occur again.

Imo moat hardware doesn't need this, unless you have a troublesome unit. I don't use it for any of my miners other than a bitfury system that's over 14 months old and sometimes stops hashing an individual card

Sounds like your usage of the device isnt really covered by the warranty. As was mentioned, its common sense (and in the T&C) that most devices and electronics may have their warranty voided if opened or otherwise modified - often at the discretion of the manufacturer.

For cleaning the heatsinks use compressed air - works like a charm, and if you blast it in the back it works well to clean fuzz and dust out of the heatsinks.

of course it is. Likely paying low power costs and difficulty increases have really stagnated along with the price - a god thing for mining.

so i tried undervolting, have 0.73-0.77 measured on all chip sections, but have tried a few frequencies between 193 and 250 with mixed results.

193-200 sems to cause reboots and only one side of chips recognizes, but does not hash at all in the first few minutes, then beeps and restarts
218-225 seems to cause about half the chips to work, for 60-80GH
250 caused errors and almost all chips x out

any suggestion? im using an 8B pencil with reasonable precision.

update: seems to be running pretty well at 212.5MHz and 65 timeout. started up with some errors, but after a reboot its now seeing all chips and producing ~120GH (no kill-a-watt handy though)

just curious - how many people are moving these to smaller/no heatsinks once undervolted? I see Chaositec doing them in a tight stack at ~50GH (~45w?) per board, and I really want to do something similar (mostly to free up some fans to replace other noisy fans on rockminer gear)

my guess is the SD card in the controller (Its a beaglebone right?) Get a class 10 card, image it and try that

not sure what youre spouting nonsense like this for - Asicminer's BE200 is a 40nm chip that is capable of 0.7w/GH. They already have a 28nm BE300 taped out that is expected to be around 0.3w/GH at the chip level

hashfast has effectively made thier hardware and IP worthless at this point

thats my guess - probably the remaining S1 units and some of the other >1w/GH gear that is operating in more expensive areas is finally switching off - and new hardware additions are slow due to a weak bitcoin value.

PM sent. as a general note, if you send me a PM ill see it sooner then i notice posts in the thread

You're really trying to sell the shit out of ltc gear aren't you?

Seriously, cloud mining is risky. Its the very definition of the perfect Pontiac scheme - where either difficulty and bitcoin price move in a way you can say 'oh, it's not profitable so contract is over as per the terms' and take any remaining profit, or to simply scamper off with the profit when you are at the peak of accepting new buyers. Watch out.

Oh god you're one of those people. My ocd is screaming at me to drive to your house, peel off the plastic, then head back home and have a beer.

For the broken hook, you could possibly embed a cord or metal ring in a hefty glob of JB weld or gorilla glue. Should bind and hold to the case for years

That's the thermal shutdown temp. Realistically, you should have 40-50c ideally, but probably won't see any real problems in error rate until over 60c

i had a TPS53355 go bad on an S1 months back (when RMA was possible), and it knocked out the section of chips. Not sure if the regulator is the point of failure, but you can actually order sample components from texas instruments (including this part) and they will often ship in nextday with fedex. (Its actually really awesome of them)

10TH here - pretty much full agreement. I make about $50/day, or ~3.7BTC in the next month - minus almost $800 in electrical bills ($0.15/kwh), so not very much profit after paying all upfront costs. At this point $1500 in electrical work, and $1200+ in networking gear, PDUs (213V), and power supplies since starting small a year ago.

if you have cheap power where you live (ie: $0.10/kwh or less, it could be worth looking into as an investment. But outside of 5-10hrs of buying, receiving, setting up, and getting it working right, there's not much more work to be done - maybe a few minutes here and there to tweak cooling or reboot - its not a job. Even with 10TH spread across 12+ machines of different brands and styles I only put in 15-30min a week tuning overclock settings or rebooting a troublesome Bitfury unit