It will definately be around +6% this period.

Two fan headers on the same machine just burned out. Now it has no fans 

Machine #1: Antminer S3 (Now has 2 burnt fan headers - has ethernet)
Machine #2: Antminer S3 (Works okay - has wifi)
PSU: Corsair RM750

The PSU was powering both S3 machines but both underclocked, one at 193Mhz the other around 150Mhz.

The burnout occurred after adding a wifi antenna and pigtail to the S3.

What would cause this? Too much load on the PSU?

The antenna was only partially attached to the case. Could it be caused by the antenna not securely bolted to the machine?

At the same time that Machine 1 fan headers burned out Machine 2 had just added a fan splitter and second fan because upon purchasing the Machine 2 one of the fan headers was already burnt out. Fan splitter for Machine 2 is: StarTech.com 12-Inch 4 Pin Fan Power Splitter Cable - F/M (FAN4SPLIT12)

Getting worried I removed the fan splitter and second fan from Machine 2. Is it okay to add it back?

For Machine 1: Any ideas for getting fans to this? Maybe a fan controller--recommendations?

Sadly Bitcoinwisdom is currently stalled. Note the last Updated time.

Bitcoin Difficulty:   113,354,299,801
Estimated Next Difficulty:   120,576,340,401 (+6.37%)
Adjust time:   After 117 Blocks, About 17.5 hours
Hashrate(?):   967,826,093 GH/s
Block Generation Time(?):   
1 block: 8.9 minutes
3 blocks: 26.9 minutes
6 blocks: 53.7 minutes
Updated:   6:10 (6.2 hours ago)

Why in the world did you repost my exact words from 5 days ago?

https://bitcointalk.org/index.php?topic=1326210.msg13622452

Not that I object if someone else lets their cat guess the difficulty

What are the symptoms of "This in turn underpowers the rasp pi which in turn under powers the little blue adapter." Does it hash slower? or Does it mean it won't power it at all?

Wondering if I should just replace the Samsung wall plug to be safe.

many thanks
turned the screw just a fraction and seems to be working fine at the moment
not seen any hardware errors as yet, but if i do, how do i adjust the clock rate ??

Sorry guys I'm out, best of luck with finding a block .

Strange. Isn't it one basic property of hash function, that with the same input it will always give the same output. So how can you hope, that with the second try the result is different?

its pretty easy to make a script that will restart cgminer if it sees you offline.. not much monitoring needed.

what are you using to run your compacs?

This is amazing.

I wouldn't invest 1 year of my salary in bitcoin mining right now (and even worst cloudmining, which is for sure less profitable than S7 mining).

You should be carefull. No one really knows what will happens with the bitcoin halving : BTC price could increase, but so will also the difficulty. and your miners could become obsolete really fast.

If you can't afford to lose the money you are going to invest, you perhaps have a better option just buying and keeping a few BTC. Their value "could" crash (we never know...) but the odds are low and it would be less risky.

Well, I finally found a way to make the fan speed at a constant % without any ramping up or down. BE WARNED IT MAY OVERHEAT!!! I set mine to a constant 20% and it got up to 81 degrees. but it did stay at a constant 20% fan, which was like 1100 RPM.

The file is in /etc/init.d/cgminer and there is a line called:


That $_fan is the % you set in the GUI and you see that 100? It's the max % that the fan can go too. So if you set 20% in the GUI, it will set your fan as 20%-100%.

So if you changed that 100 to 20, then the max would only be 20%, so it would be 20%-20%. See following code:

WARNING: Be careful though, running at a constant 20% max might be too low from my testing (varies on your ambient temperature), since it was only at around 1100 RPM and with my ambient temperature, it rised up to 81 degrees fast. So maybe set the GUI fan speed to 100, and edit /etc/init.d/cgminer for max 100, and test by -10 increments each time to be safe, so the temperatures don't run that high.

P.S. if you don't know how to edit or get to /etc/init.d/cgminer, then maybe it's best not to touch it =)

Has anyone ever figured out how to disable the SmartSpeed function other than changing the minimum fan speed? Mine temperatures are 28 53 69 and the minimum fan speed is at 20% but the fan speed keeps ramping up and down. I just want to make the fan at a constant speed/noise.

Guys,

I hate to be the bearer of bad news but I too experienced the same issue Phillip with the Over volting burnouts.  I have my IBM 4K voltage set to 12.65V which the Avalon GUI would show 12.5V.  SO PLEASE DO NOT change the voltage unless you can guarantee your environment temperature remains very cool.  My Avalon 6 is no longer functioning as a result of my wife closing the garage door all the way (I normally leave 8-10" gap).  This cause the ambient temperature to rise to 91-94F.  All the S7 handle it find as I have all the FANs set to 60%.  

I wish I did the same for the Avalon 6.  I don't care what anyone say, this SmartFAN is pretty stupid as you can see it normally let the box goes to 76C even when my garage is cold.  When you manually set it to something like 50-60% it runs cooler in the 68-72C.  I wouldn't leave it at the min of 20% for the summer months.  I'm currently temporarily hosting 2 other Avalons for my brother and I tell you, it's going to be stock voltage and Min FAN speed of 50%.  They run inside my house so they're much more pampered, however without over volting, I feel that Avalon should compensate the buyers for the misleading advertised hash rate of 3.5 or 3.65TH.  At least Bitmain say +/- 5%.  There's no such statement for the Avalon and all 3 Avalons I have are running only 3.2-3.3TH on both EVGA G2 and Dell 750W PSU. I never see it hit close to 3.5 or 3.65TH without over volting.  

Everyone knows I'm a huge fan of the Avalon 6 and have been a big supporter of it, so this isn't a bashing post but more of a warning.  Fortunately for me I have AMEX purchase protection for the first 90 days so even if my son kick it down the stairs because he hates me, it would be replaced by AMEX during the first 90days.  However, I do wish I purchased this unit thru Block C or Oregonmines vs Zoomhash.  All I need is a statement saying that over volting voids warranty or simply a price quote for 2 hash boards so I can get AMEX to approve the reimbursement and get this fix.  You would think that is pretty easy as there's no liability for Zoomhash and it's a sales opportunity, but it's like pulling teeth. This is where I applaud Yan at Block C for his wonderful support for Phillip.  Needless to say, I won't be purchasing anymore units from Zoomhash.  

Too summarize, the Avalon 6 is still a great box as long as you use it as designed as I never had a single issue for 2 months I've owned it.   Unlike the S7, it's quiet enough to run inside the house, but if you get the itch to go to 3.8-39TH via OVER VOLTING, please thread carefully and make sure cooling is consistent and monitor closely.  

in morocco we cost 0.09$ per 100KW/H...it's cheap ou not ?

Part of what I find scary if they really have them is bulk sales.   They chances are will use internal and get first on all they want I would guess.  Then they move to big buyers.  And if you think about it I'm willing to bet they have some sales already saying once chip comes out they want to buy.

Even at .11 it beats SP50, so not sure what SP team will do.   Unless they play price games which did not help them on SP20's.   So I think our main driving force will be bitfury.  Only thing we don't know is if some companies such as Bitmain have one sitting there ready to make that can compete with bitfury.  I almost hope bitfury is only one for a bit.... as I hate seeing high difficulty rising.

Value is up around 400 again (a few dollars shy), but positive to see a tad bit of rising.  Difficulty is not looking great.

Meanwhile
Next Avalon6 giveaway starts in just under 7 day

i agree seems with all this hash its been swinging very wild  i wonder if that has to do with block propagation.. If half the network is constantly 30sec - 1 min behind at block change would that cause crazy flux.. or is that negligible at this point..  Interesting for sure


Edit>> also i was thinking that they turned on and left it on all along and this could have just been network variance on finding blocks.. Hard to say.. But ive seen a lot question why one would turn on such a large amount and off(leaving coin on the table)  but it could be testing or heat issue.. could also be a bad streak of luck as well..


Best Regards
d57heinz