You've probably seen this or similar written elsewhere. 

"The past is not a guide to the future and you may get back less than you originally invested."

So I fitted the two noctua NF-S12A FLX (DC12V - 1.44W - 0.12A) fans today and the flippin temperature has gone up!! by about 5C so I can only assume they're not pushing nearly enough air. Presumably 1.44W is too weak.

with the case off the unit was reporting 65-66C now with fans in its gone up to 71C

It may be that the top fans are pushing more air out of both ends than the two noctua end fans can move. I've made sure one is pushing and the other pulling so it isn't that causing the temperature issue. By contrast the other 3 miners running alongside are a good 15C cooler which is frustrating because fitting them was a royal pain. They're all in a cold loft space at the moment.

Can anyone suggest any specific 120mm fan replacements that are good for these SGL600G units?

much appreciated

work is still being accepted, bit (see what i did there) off putting tho'

and its back..

It is

Active repeater cable

Yeah I don't want to divert the topic to hardware, if money was no object then I'd have them in bits and replace the fans and the psu's.

As it is I have a dilemma of not spending a penny more on them while trying to get everything I can from them - damage limitation mode well and truly engaged at present. I've so far managed to refrain from punching myself in the face.

I have one spare corsair HX650W unit but that only carries, according to their website, 20AMP on the 5V rail (although the brick label says 30A) and then 53A on the 12V rail. Just don't want to be adding to the wreckage.

What I was fishing for in the OP is whether there is any obvious command line switches I'm missing when using BFGminer with SGL600G.

I have them lashed to a 12m USB lead in a loft because the racket they make is unbearable in a small room. That may cause some issues but I'm not convinced it is that causing any specifically, they do work for long periods without any obvious problem although the bitminter client has a long list of "stale or alien proof of work" entries in the log. Also the occasional extraneous data received entry.

Since 10am this morning (UK) I've seen shift results of 223,220,222,228,218 which is quite stable compared to the numbers I saw the last few days.

The bitminter client is showing rejection rate of 5% currently - miscalcs running at an easy sub 1%

When running before the errors start all 4 combined produce a fairly stable 235-240 GH. The problem is when after just a few minutes I start seeing the rejection errors (unknown - work)

I suppose in many ways I've bitten off more than I can chew because I just don't know enough about the software (BFGminer) or the SGL600G units to start troubleshooting in any coherent or methodical way.

At present running the bitminter client makes things childs play but even that has produced some issues over extended periods where the 210-230 GH rates per shift starts falling away to the 190-180s before I stop it and restart them manually (which for some reason seems to work.)

Occasionally the machines will stop and restart themselves, I don't know whether that's normal. Every time anything happens that isn't expected I start to get paranoid these things are going to pack in.

What's really pissing me off is how much I paid for these, a stupid amount, and yet I absolutely know they're never going to make me anything. I knew this before buying them but did anyway like I was possessed or something. I don't know what you'd call that, only words I can muster are utterly stupid.

Within about an hour of getting back and setting them up I sat in a cold sweat and thought "what the f*ck have I just done..."   

Can anyone help point me in the right direction please.

I bought 4 BFL SGL600G units and hooked them up - I've made a huge mistake, paid a massive price and stand to lose a fortune but that's my problem. Let's just say temporary insanity gripped me. At the end of the day it's only money right (I have to keep telling myself that)

I'm having to use the bitminter client since it's the only way I can get them to play. I have been using erupters on eligius without any issues as you might expect.

When I run BFGminer with these and no command line switches other than those needed to access the pool, it sees all four of them just fine, but after a few minutes running the Eligius server sets the difficulty to higher and higher values, 2,4,8,16,32, etc.

What's happening is that some of the workers (it looks like each unit has 10) update with the new difficulty and some don't.

So that after a while there will be work being accepted from workers at 256 without a problem but others being rejected from those stuck on 2 or 4 or whatever (with an "unknown-work" error)

Sorry if this is a pathetic explanation, I haven't a clue what is happening, can anyone help?

***
Windows 7 Home 64 bit
BFGminer 3.8.0
FTDI drivers installed
***

Hello folks,

First time I've asked tech questions here so please be gentle. Apologies if these are dumb and have been asked hundreds of times but hope you can help.

Is there any collective wisdom on what the best fans are to replace the stock fans in the BFL Single SC? These four units are very, very loud, I had to put them in the loft and stand them on a thick bubble wrap padded platform to quiet them.

I have two noctua NF-S12A FLX (DC12V - 1.44W - 0.12A) for one box and looking for some reassurance these won't just make it start smoking when fitted.

I also want to take the heat sink off and clean, then use some paste on there. Is that generally a good or bad idea? I'm quite comfortable around computer hardware but obviously don't want to go diving in if there is something I ought to be aware of beforehand.

As it stands the units are all working but i had some major problems with BFLminer and them not working properly after an hour or two. I've since been using the bitminter client and they seem a lot happier.

Is it normal to see the hash rate bouncing around from between 180 to 300 on four BFL single SC's ? It's stable around 210-240 a lot of the time but does bounce around (this in bitminter client)

If anyone can help or point me to a thread that will that'd be grand

thanks
J

edit: I also have them linked to this PC via a 12m USB repeater cable. That might have some effect too?

Not much of an endorsement is it.

"we're not as bad as NK" (yet)

There is no ROI guarantee, doesn't matter how long the time frame, the cost of running equipment will rapidly outpace anything it can earn in btc. Reward will drop by half approx. every four years, next due around Aug/Oct 2016, hash rate will sky rocket, electricity costs will rise significantly. You'll be trapped in a loop of pouring more and more fiat or earned btc money into ever more efficient miners just to stand still. Anyone not upgrading in line with the increases will just end up being squeezed out of the process.

If you're going to start mining for profit now you're insane, for a hobby fine - no problem, otherwise just buy btc. All the benefits of increasing btc "value" with none of the overheads, stress and hassle.

When I use the word America I'm not thinking about geography and arbitrary fences.

Now ask yourself which of those two things the false wars on some drugs and some terror, the patriot act, homeland security, surveillance state and the NSA is doing.

fwiw I tend to distinguish the USA from America. The government from the people.

America and everything it used to project is disappearing fast but it's always had a government in modern times that suffered a creeping paranoia and belligerence. Probably the worst problem facing America is the Zionist takeover of US foreign policy, creeping police state, fascism and seemingly endless illegal wars and rampant extra judicial killings on a whim, which all do nothing for its image abroad. They're nothing new of course but are becoming increasingly distasteful and blatant and perhaps a dress rehearsal for the coming collapse at home.

I live in the UK and have a similar attitude to the corporate stooges enriching themselves and running this corrupt shit hole of a country into the ground too.

slush, then bitminter, then eligius

Until problems like this can be unwound I see little future for btc in a wider monetary context. It's only ever going to be a novelty store of value.

Not gonna happen.

In terms of mining the future is more or less known, the mining difficulty will only ever go up unless the process is somehow compromised and dies which is unlikely.

The next drop in block reward will really separate the righteous devoted miners from the casual miners because the mining process will just become a much more serious fiat money pit unless btc "worth" rises significantly.

The people I feel sorry for are those who were ordering KnC miners with their life savings and expecting to be millionaires in a year, they were warned.. but greed has that effect.

Isn't the whole concept that the people would do it for themselves not the government... ?

I applaud the sentiment, without doubt the genie is out of the bottle but your confidence is somewhat misplaced imo. The false war on some drugs, it's bastard offspring, the false war on some terror and the decades of eroded civil liberty around the world has led to a powerful international surveillance police state that no-one could ever have imagined possible in the "free" world a generation ago. The stasi could only have dreamed of being able to snoop on citizens to the extent the powers that be can today. So if they need to find anyone doing anything it won't take them long.

When it comes to btc all they will probably do is start bribing people to reveal their transaction identities and the anonymity of the network will start to unravel. The most likely scenario is that there will be some sort of internationally coordinated takeover of the btc network and a dismantling process started. I'm all for btc taking back what has been stolen by banksters, don't get me wrong, but some of the euphoria about what btc is and will become seems hopelessly misguided.

I mine bitcoin to support the network and as a bit of hobby interest, fully support the usurping of the fiat robber barons and hope btc is the spring board required to do so. Unfortunately I also see a great many hurdles before the finish line is crossed.