0.3MPa.

No, it can't brick it but you have to watch the temps (must be < 70C).
When you reboot, the modification will be gone, it is not persistent as it is not in the firmware.

I have to give props to the Bitmain service center in CO. I sent my S5 to them (from Phoenix) for service on Monday and had it back by Friday. No report on what was fixed or repaired, and it doesn't really matter. The unit now works great.

I know this has previously been discussed but the lack of search is killing my time looking for a refresher. I appreciate your patience when explaining these things. If you know of a page in this thread or another thread where I can find these answers please point me in the right direction.

All of my discussion is 'US residential" 240vAC (2 wires each measuring 120vAC and a ground) and not what I normally see in Industrial locations 240 / 480 3 phase. The same which runs most dryers in your home.

 I am moving some miners over to a new 240vAC circuit and before actually pulling the plug so to speak I wanted to re check my numbers.
I remember being told and I think it was this thread that each blade has the potential to pull 13.8 amps. When I start running my own numbers based off the product specifications at BITMAIN I see 366 watts 'at the wall' being specified.

Re-reading page 1 of this thread does indeed quote both numbers. This leaves me confused.
I assume the 13.83 number is quoted at 120vAC. Which if I run 366w at 120vAC I expect 3.05 AMPS.
At 240vAC and 366w I expect 1.525a and so on.

Please help me understand this point. I do have a licensed electrician who approves my work, but, I must give him the correct information for his approval to be worth something.

I am wondering if this is the difference between a quoted nominal voltage - 240vac 1.525 Amps and the number thrown out of 13.83 at 120vAC being 1659.6 watts and respectively 240vAC at 6.915 Amps being the same wattage as only amperage draw would be affected with the voltage change.

Is the quoted 366 watts a nominal draw where 1660 watts is similar to the inrush from a motor starting and that is what the S3 or S3+ would draw at Max load during startup?

Some breakers have inrush protection to handle the additional load / draw at power up. A timer which can be set, usually a dial you turn to adjust the amount of time the inrush is allowed. Is this type of thing the difference in the quoted numbers or is it something else I am missing entirely?

I appreciate your help and hope anyone reading this knows I am doing everything possible to be safe and so should you. I double, triple, and quadruple check my breaker type and size, wire size and length, psu specifications and ratings, the wire size going to the miner and connection points, ie the connectors themselves where the wire attaches to the miner or any other components.
Noise levels are not a concern to me at this time. I love the noise. It blocks out other distractions.

Thanks for your time.

Anyone on from Bitmain warranty?  Please review ticket ID: 813.  Bad PSU under warranty..  Thanks!

Does anyone have a part number for a replacement fan? Mine has seized.

He's probably looking at the efficiency of an electric water heater vs the cost of shipping that much mass across five time zones/Atlantic ocean. Wherein it'd cost pretty much the same to heat water at $0.45 in Ohio, palletize it and send it the several thousand miles to a British man in need of a shower (or tea?), as it would for said British man to heat the water locally using the same equipment at a much higher power cost.

Which... that's an interesting way of looking at power cost distributions.

yeah at $0.045  a kwatt

 I would buy some gear.

Same on my end. In most cases I get fast respond but not this time... S1 cable will not work. It is different... I looked...

Are both of these from BITMAIN?

I have been running some on 10-24 and 12-19. The better overclockers I run on the strongest PSUs since the voltage does have an effect. The poorer performers I have been running 12-19 with until I get to whichever unit and figure out why it is hashing slower than the others.

In my experience it has been the unit which decides which firmware is better. Or there is a possibility I'm not doing something right.
I set the poor performers to 218 / 0720

Let me explain as you can see from the images below the S1 has a best share of 5.5 million, but the S3 is still sitting around the 1k? WTF???

So does this mean that the S1 is truly better then the S3 even though the S3 have 4-5 times the hashrate or is there actually something wrong with the firmware yet again. IDK if anyone has this same problem but me myself I think that S3 should be around 20-30 million by now after 12 hours of runtime. I don't believe this is "luck" as it is on a pool and yes have tried others with the same results.

I have posted this issue before on a different thread and someone told me it was a "luck" issue and if so then that means the S1 is FAR better then the S3 anyday and I don't believe that believe this is a firmware or maybe CGminer software related issue. Because I still don't think the S1 should have such a high best share reported and the S3 be so low and no the miner does not act strange in anyway. It runs fine and is on a EVGA 750 B2 PSU (brand new) also have tried it on the CX 500 PSU the S1 is on and same problem.

Also ran both of them for 3 days on p2pool and the S1 had a BS of 14 million + but the S3 didn't even hit 8 million so therefore the S1 was finding all the shares and the S3 didn't do a thing.

Thanks Dogie,

What do you think reasonable percentages are for the Diff1#, DiffA# on the HW line?

My S2 has been running for 2 hours and I am at:  2456  0.1358%  0.1506%
Thanks again.

My S2 (batch 2) stopped running 78 hours ago, after running flawlessly for months. It has been hashing since 2014-04-17, the only thing I did early on was replace the PSU with a Corsair AX1200i.

So after hashing for 9 months, all of a sudden it stops.

The display is blank and the red LED is on (red = bad sign, normally has a flashing green LED). The fans are working, and I can see the green Ethernet networking light flashing inside on the BBB controller. None of the lights on the hashing boards are showing.

The unit is in a stable environment inside a quiet rack cabinet. The other miners in the same cabinet are working fine (a KnCMiner October Jupiter which has been hashing for 1 year 3 months, an S1 hashing for 11 months, and a Spondoolies-Tech SP10 hashing for 8 months). Nothing physical (e.g. G-shock, liquid) has happened to the unit.

Looks like a failure of the controller, as the web page won't come up, and I can't even ping the IP address of the unit (which I have fixed on my router using DHCP Reservation).

I only have one S2, so I can't troubleshoot by replacing the controller board with one from a good unit.

I'm I right in thinking that this is BBB controller failure? If so, it is possible to get a replacement?

Seeing as this is the Bitcoin Hardware forum, Scrypt miners are irrelevant. What is the status of the SHA256 miners?

Do they even make/sell Bitcoin miners or just resell Scrypt miners?

There is PLENTY more available on technobit outright fraud but Dogie I guess is a paid spokesmen for them as well given that rating seems to be a few of those type ratings in his guide. Minersource to my knowledge has also defrauded at least one other fabricator like the claim black arrow made and have as Gleb said left a trail of broken contracts beyond what you read in these forums typically. Do not deal with either company. Further just avoid Dogie's hardware guide too many inconsistencies with regards to turning a blind eye to fraud or lack of ethics.

will do - wasn't trying to start something, was just curious about the 80C safeguard

Some quick math has the Spondoolies coming out ahead. From the websites, the 52 and 15 unit pricing has the S5 with a Price Per TH at $357 and the SP20 at $215. That's a no-brainer. I haven't factored power consumption in yet. Still building out my Excel sheet.