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Powertune is set to 20 on them. Getting about 535kH/s per card with standard riser cables (not powered, but some are on the way to see if it will boost the kH/s and let me drop the powertune to -5 or -10).
Why are you setting powertune to 20? Are you overclocking?
BTT: 
What kind of case is that, and what temps do you see on your gpus?
Hello, This is my first mining rig, done entirely in aluminium 3mm thick, screws are all 1/8 directly screwed to the aluminium (previously threaded) (is that well said?, english not my first language, don't know how to explain it properly).
I think it looks great!
The motherboard looks like it's resting on top of some aluminum (?) pegs. Did you make those or buy them?
This gear gives 1GHash/s (BTC) at stock speeds and eats 450W, I know, small for what i have seen here 
but it's my first attempt, hope u like it.
but it's my first attempt, hope u like it.1 Gh/s sounds low for four 7850s. I have two 7850s, one gets 320Mh/s at 1050 and the other gets 350Mh/s at 1150. Are you running at stock?
To get some more kH/s out of the cards. I've got the engine set to 1078 and the memclock to 1490
You only need to raise powertune if your overclocked system isn't stable. If that's why you did it, then fine, but if it was just part of a copy-paste of someone else's settings, try lowering powertune. That should lower your temperatures.
If you want to apply the above patches, you need to use the python code from https://github.com/Kiv/poclbm instead of running the Windows executable.
Re: *** WorldCoin Pool Report *** All your WDC Pool Talk Here ***
P2Pool admins please share your code. P2Pool is GPLv3. 
Thanks.
edit: Correct me if I'm wrong, but i think if you fork GPL software, you have to make the source code available.
Thanks.
edit: Correct me if I'm wrong, but i think if you fork GPL software, you have to make the source code available.
Not that it really matters much, but you are wrong.
Quote from: Wikipedia link=http://en.wikipedia.org/wiki/GNU_General_Public_License#Use_of_licensed_software
In purely private (or internal) use with no sales and no distribution the software code may be modified and parts reused without requiring the source code to be released.
Re: [YAC] Illustrated, step-by-step guide to starting your own AWS YAC server farm!
How does one kill all screen sessions? I accidently started a few sessions per server and they all have different numbers, I want to kill them all in one swoop and start over
killall screen
You of course realize there are ways to fiat other than Dwolla, right ?
I beleive Dwolla was popular becaus it was cheap and quick to get even small $ amounts into and out of BTC.
You can still use Dwolla. You just need to use CampBX as an intermediary.
MtGox<->CampBX<->Dwolla
I would recommend 8 with 6 GPUs. also don't use a total shit CPU. Use a intel sandy bridge series processor at the least. doesn't have to be a good one, but i'd recommend it. With the recommended boards you've seen such as the MSI Z77A-G45, a sandy bridge processor is a must. Also, I recommend using a server power supply (1600W min). Or just ground two 1000 W PSUs together.
Honest question, why do you need a Sandy Bridge?
I was under the impression that he was going to do some Scrypt mining. Sandy Bridge processors aren't crap for it from what I've heard.
The reason someone would want to use an IVY bridge CPU is if the motherboard they have disables one of the pcie slots if an IVY bridge CPU isn't being used.
All CPUs that fit in a socket 1155 board are at least sandy bridge, even the low end one core celeron g440.
4.1) Do I need ADD2PSU to connect those two PSU's? http://www.add2psu.com/store/
That would work very nicely, but (Not sure, check me on this one) the only purpose to using two power supplies is to use the extra pcie connectors to power the cards. That ADD2PSU thing is mainly used in server motherboards.
That would work very nicely, but (Not sure, check me on this one) the only purpose to using two power supplies is to use the extra pcie connectors to power the cards. That ADD2PSU thing is mainly used in server motherboards.
The benefit of ADD2PSU is making sure your chained PSUs start simultaneously, or as close to it as possible. Otherwise, you may run into problems if some of your cards aren't getting power when the motherboard is POSTing, so they don't get detected.
Also, make sure the molex cable and PCI-E power cables for a card on a powered riser all comes from the same PSU. Again, this can be a source of trouble if you mix the sources.
do i really need to expensive psu? how much each card pulls?
No. Buy two less expensive (but still high quality) psus and chain them with an add2psu.
Avalon is selling for so much more because they CAN. They have a product in hand that nobody else can really compete with at this point. Why would they sell it any cheaper? If/When BFL gets their asses in gear and starts shipping a product, Avalon will have to bring their prices down to whatever the market forces are driving.
And if they really wanted to maximize their profits, they would artificially delay shipment of round two and three, while collecting more BTC780 10k chip bundle orders.
That way, they keep people from getting scared away from ordering the chip bundles by a skyrocketing network difficulty.
Not that I necessarily believe that's what they are doing. But that would certainly increase their profits...
I'm not sure what you're saying. Even if BKKcoins needs to add 10 or 20 or 30 USD in the BOM, say for cooling, then end price for a 240 chips machine will be around (lazy math coming) 15*400 USD = 6000 USD, without shipping and PSU. That's bang on with the 75BTC (8475 USD) that Avalon is asking, at the current BTC/USD value (around 113 as of this post), assuming Avalon wants to make a profit, 30%-40% seems like a reasonable markup (6000*1.30= 7800 USD, 6000*1.40 = 8400 USD).
BFL OTOH is so much cheaper it's scary. Maybe they figured they could release their ASICs at those prices and totally underestimated the demand. Now they realize you actually need a whole infrastructure behind their production, probably need to hire more ppl and have generally increasing costs (not to mention their engineering blunders). Ramping up fast is messy. and costly.
I think BKKcoins is in the right numbers, ballpark with Avalon. BFL is so much cheaper it is actually worrying.
BFL OTOH is so much cheaper it's scary. Maybe they figured they could release their ASICs at those prices and totally underestimated the demand. Now they realize you actually need a whole infrastructure behind their production, probably need to hire more ppl and have generally increasing costs (not to mention their engineering blunders). Ramping up fast is messy. and costly.
I think BKKcoins is in the right numbers, ballpark with Avalon. BFL is so much cheaper it is actually worrying.
Avalon was expecting to make a profit when they planned to sell round 2 for $1500.
They were expecting competition at that point. When the competition failed to materialize, they jacked the price up as high as they believed they could get people to swallow. Everything above $1500 is monopoly rent for Avalon.
BKK's price comes close to Avalon's because the majority of their cost is Avalon's chips, which are probably making Avalon even more monopoly profit than their finished products.
I have no problem with Avalon making the money that they're making. They deserve it for beating the competition to market by such a huge margin of time. But don't think their prices are anywhere even close to their costs.
Re: CGMINER ASIC FPGA GPU overc monit fanspd RPC linux/win/osx/mip/r-pi 3.0.0
The last version of cgminer I was able to compile on OS/X was 2.10.5, since then there has been a change to usbutils.c that has prevented it being compiled.
the error is:
usbutils.c:805: error: redefinition of union semun
I removed the offending code
and tried to recompile and got
usbutils.c: In function cgminer_usb_lock_bd:
usbutils.c:908: error: union semun has no member named seminfo
usbutils.c:924: error: union semun has no member named seminfo
so it seems the semun structure on mac osx doesn't include seminfo for some reason.
any ideas?
semun doesn't exist on linux - you have to define it yourself.the error is:
usbutils.c:805: error: redefinition of union semun
I removed the offending code
and tried to recompile and got
usbutils.c: In function cgminer_usb_lock_bd:
usbutils.c:908: error: union semun has no member named seminfo
usbutils.c:924: error: union semun has no member named seminfo
so it seems the semun structure on mac osx doesn't include seminfo for some reason.
any ideas?
I guess the OSX OS devs misunderstood that
You'd have to come by IRC to help work out how to fix this in OSX - in linux I define it myself as per the requirements - but that fails in OSX coz it is already defined
Maybe in a few hours though I don't have time right now
I am also encountering this issue. Was it ever resolved?
I was using http://www.spaceman.ca/blog/?p=235&cpage=1 to help me get the build up and running.
Build cgminer without enabling support for anything that requires usbutils.c (currently that includes bitforce, modminer, and bflsc). That's what the blog you linked does.
Looks great and the larger board as was said, is simplified a bit. It said power was two 6-pin connectors so whether that's meant for an ATX PSU only or adapts to a power brick or something should be made clear soon enough.
I'm sure they'll use a power brick, with a mini-fit jr adapter. Something like this, but bigger: http://www.mini-box.com/12v-16A-AC-DC-Power-Adapter
cleared my balance and went to coinotron. Anyone recommend any other LTC pools?
Is there a single damn litecoin pool that doesn't make you wait till you have 1 coin before it lets you withdraw and that doesn't stick you with a 0.1ltc fee if you withdraw?
ugh this is tedious...
ltcmine.ru doesn't have a withdrawal fee or 1 ltc minimum. They use a shared maximum PPS system with a 2.5% fee.
Re: [ANN] [LTC] [PPS] [OTP 2FA] [Stratum only] LTCMine PPS mining pool (2.5%)
Have you ever thought of implementing an Auto pay out option so that for example we are paid out automatically to our wallet every time we reach 1 Litecoin or 5 litecoins.
+1
Balthazar mentioned previously that he was thinking of (or maybe planning to) port the automatic payment code from itzod over to ltcmine, but then he got busy with security and anti-ddos fixes.
I'm also looking forward to automatic payments, but it's a minor thing compared to making sure that the pool is working, stales/rejects are low, etc.
Re: [WTS] Litecoin Mining Rigs - Hand assembled, tested, and shipped from Canada!
Between 65-75 Degrees centigrade. It also depends on the environment surrounding the case.
We take care to ensure there is lots of air flow within each unit (each fan port will be utilized), and we custom tweak each unit until they are hashing 1800 khash/s on average over 24 hours prior to shipping.
We are still accepting orders. Please PM me for more information.
We take care to ensure there is lots of air flow within each unit (each fan port will be utilized), and we custom tweak each unit until they are hashing 1800 khash/s on average over 24 hours prior to shipping.
We are still accepting orders. Please PM me for more information.
Those are unbelievably impressive temperatures for a 3 GPU aircooled rig in an Antec Eleven Hundred, since Anandtech measured a single GPU rig hitting almost 50C above ambient.
Do you have screenshots to substantiate your claim?
Re: [WTS] Litecoin Mining Rigs - Hand assembled, tested, and shipped from Canada!
So what you're saying is, you've never built one of these and you have no clue how hot it's going to get inside the case
I've built numerous mining rigs
Glad to hear it. So what temperatures do 3 aircooled GPUs run at inside an Antec Eleven Hundred?
Re: [WTS] Litecoin Mining Rigs - Hand assembled, tested, and shipped from Canada!
So what you're saying is, you've never built one of these and you have no clue how hot it's going to get inside the case, without the watercooling system shown in your stock photos, right?