See under my name where it says "curmugeonly hardware guy"? That's not a joke.

I still stand by everything I said. There is no reason to assume something not a U3 is a U3 and expect U3 drivers to work. (Who told you it would? That person must be confused. Did it somehow enumerate as a U3 in an old version of cgminer?) In the first post of this thread are download links for Windows executables of the proper software and also descriptions of command-line flags specific to the 2Pac driver. The things you need to solve the problems you're having.


I'll kindly answer questions that haven't been asked yet. I'll sarcastically answer questions that have been answered several times already. I'll ignore questions that have been answered so publicly and frequently that finding the answer should take a person who's gotten this far no more than 30 additional seconds of work to find it for himself. I won't do your homework for you.

What you are doing wrong is assuming it's a U3 when it's very clearly not a U3.

The other thing you're doing wrong is not reading the first post in this thread, which explains everything you're asking about.

Um, okay. How about I only do bulk and reseller orders from now on, so the only option for anyone is to go through resellers' websites and I never get bothered by anyone except the people I already know I like? Then I don't have to spend a week redoing my website and I don't have to give a leg up to the community I expect to try a little harder than the average jackass.

Or maybe I'll continue to expect more from the average jackass than average jackassery (that's not going to stop) and hope people follow the very simple rules.

Okay, new rules for purchasing.

I don't know how many times it's been stated that sales are open. It will be very well-known if sales are closed. So I will no longer respond to the question "are sales still open?"

The squeaky wheel gets the grease, but past a certain squeakiness threshold the wheel gets discarded. To this end, I will no longer respond to multiple identical purchasing requests sent within the same 12-hour period. If you want something, ask for it and be patient. Impatience is annoying.

I'm a builder, not a babysitter, so I won't sell to people who haven't done their homework. If you can't correctly identify the thing you want (for example, there is no "gekko stick", no "compaq" and no "2 pack") I'm just going to ignore you.

I really really like the parts of my job that are designing and building stuff. I really really don't like the parts of my job that are nickel-and-dime sales to chumps with bad spelling, so I'm just going to cut that part out. I like money but I don't like being annoyed all the time by other people. So if you want something, find out for yourself the sales status, find out its actual name, and politely ask for it one time. If you can't do that, go bother a reseller.

And both posting in this thread and sending me a PM get email alerts, so I was told four different ways that you sent me a message. Just the PM is enough.

My hosting is all run on 3-phase because that's what was provided to the shop I'm in. I have three shelves, each one supplied with 208V by drawing from two of the three legs. First thing I did was install current meters on each leg at the junction box dropping to each shelf's sub-panel so I could monitor the power on each leg and keep things balanced. With a balanced three-phase, just like with a balanced split single phase, there will be no current on the neutral leg and that makes the most efficient use of the power line and transformers.

Running on 240V instead of 120V keeps things balanced automatically, because you have two hot legs and if they're both sourcing the total load then each leg is supplying the same power into the load.

For a given load, using higher voltage means lower current required. Copper loss (resistive loss in the mains wiring) is proportional to current squared, so if you double the voltage you halve the current and quarter the copper loss. Total system efficiency is increased. A good active-PFC PSU (the only thing you should be using given the loads you'll be drawing) will take the input AC and boost it to a DC bus around 380V. If the input voltage is already high (and the current low), that booster won't have to work as hard and your PSU will be more efficient.

Provided the output was compatible (or easy to transform), that'd be a better option.

Anything that'll make a 12V pulsetrain at about 135Hz on the tach line will tell the controller it's got a fan running at 4000RPM. A $1 555 circuit will do that.

Yeah. I'm restocking on PSUs so I'd need to wait for them to arrive but I've got everything else.


In case any of you GPU rig guys are interested, I can make cables for EVGA modular PSUs, including a cable to power a seventh GPU from the unused CPU power jack.

In general yes, but if you're looking for boards for that PSU I don't have 'em.

Might try upping the voltage a bit if you want to keep running 100MHz.

For batch 2 which starts manufacture this week.

I'm pretty sure there's a problem with your wattmeter's accuracy.

No update, haven't had time to work on it. Got all the parts, just not the time.

Anyone in the US who gets one of these for an S5, I'll buy the old hashboards off ya.

For the record, I've had my nose so deep in my own hardware projects that I actually have zero idea what "segwit" even means, so like Biodom I'm not in favor or opposed (as I lack the requisite information to have an opinion). But I am in favor of specifically not ASICBOOST and more specifically not screwing customers.

I don't design a chip, but I do come up with an idea that uses a fork of the current protocol to enable a trick to hash more efficiently. I then sit back and collect money from chip designers who want to implement that idea in an otherwise open-source endeavor. The "new math" isn't the problem, it's the one guy who does no work and profits from the labors of many in a way fundamentally at odds with the philosophy of bitcoin that's the problem. That problem is exacerbated by a single manufacturer who paid the fee and implemented the trick and didn't allow the buyers of their hardware access to it (and other features). My opinion, screw those guys and the horse they rode in on.

But Phil, there's a lot of stuff you and I will never agree on.

Bitmain has a standing policy of putting features in their miners and not making them accessible to end users. The S7 was able to adjust core voltage in software (the hardware to do it was definitely there) much like the S9 does with auto-tuning, but controlling that ability has never been given to end users.

Changing the protocol every time someone makes a faster chip isn't really a problem, likely won't be the case. It's not the case now. The open-source bitcoin protocol change that breaks a particular manufacturer's closed-source backdoor implementation of a closed-source licensed feature, that I'm okay with.

GPU mining of alts is a fundamentally more honest way to mine alts. It's not a more honest way to mine BTC because it's not a way to mine BTC at all. But you're right, BTC miner manufacturers have been screwing people and the network since the beginning.

Cool. It's good to see everything working, took some figuring out to get the cable needs nailed down but it looks great.

I bought an S7LN, that's the last new Bitmain miner I've purchased since the S3 days and that was so I could figure out how to hack it. Right now it's providing heat for the crapper at the shop. Figure I'll stick to mining on secondhand gear and stuff I build myself.

Not supporting nefarious actors would be nice. ASICBOOST itself wouldn't be too bad (I mean, it is a good idea) if it wasn't being patented and licensed out. That's pretty counter to Bitcoin philosophy in general. But Biodom, I figured out a long time ago that people who stuck to their ethics are a sore minority in the bitcoin world. People here really like to make money and don't often care how.