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    GPU Mining Quiet before the storm

    February 08, 2018

    GPU Mining Quiet before the storm

    Quiet before the storm

    Posted: 08 Feb 2018 03:48 AM PST

    "What? No, I'm not mining in my garage."

    Posted: 08 Feb 2018 05:35 AM PST

    PSA: Risers, molex and modular power supplies.

    Posted: 08 Feb 2018 03:39 AM PST

    This post is pretty much aimed towards modular and semi modular power supply users. If your power supply is an old school NON modular type then you might want to grab some popcorn!

    This is something I have been questioning myself with for a few weeks now and I finally have an answer too…

    Powering risers from molex cables, how many per cable?

    The current rational seems to be that two risers per molex cable is OK, but one per cable is best. Although, looking at the pinouts of modular PSU perif ports, powering two risers per molex from a modular power supply may not be "safe" either. Don't get me wrong, it will work. My own rig is connected in this manner at the moment though I am looking at how I can change it!

    I have been having a back and forth with another reddit user on another post "A lot of misinformation in regards to PCIe6/PCIe8". Although their post is IMO dangerous in the way it is worded (it only accounts for the connector and cable, not what configuration lies behind it), the actual specifications regarding maximum power that the connector can handle from a design / manufacturer / specification point of view are correct. Each pin CAN carry a maximum of 8A at 12V.

    As part of my discussion with them I found a pinout of a Corsair modular power supply. This is the type of supply I use myself on my rigs. I have also found a couple of other makes to check if this is a common thing or specific to Corsair.

    Corsair AX pinout - http://cdn.overclock.net/photopost/data/968859/a/a4/a44ab88f_CorsairAX1200iPinout.jpeg

    Silverstone ST - http://www.overclock.net/photopost/data/1012880/e/e2/e21e9ed3_SilverstoneSSTST65FGPinouts.jpeg

    EVGA - https://forums.evga.com/download.axd?file=0;2387051

    Noting that the "perif" connections only have a single 12v line attached makes me question the 2x molex per riser rule. Why?

    Because they only have a single pin designated as 12v, the maximum current a single perif port can supply @ 12v is 8A.

    8A @ 12V = 96W (maximum load)

    6.4A @ 12V = 76.8W (80% 24/7 rating.)

    This means that by using two risers per cable we are potentially loading our modular perif connections at twice their rating.

    So this leads me to believe that those of us using modular power supplies may need to reconsider how we are powering our risers!

    submitted by /u/APUK-Admin
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    Ordered MSI 1060 6gb on amazon got https://imgur.com/gallery/VMyro

    Posted: 07 Feb 2018 06:44 PM PST

    Mining rig + clothes dryer. Perfect for this New York weather!

    Posted: 07 Feb 2018 03:07 PM PST

    1 Down, 5 to Go!

    Posted: 07 Feb 2018 07:27 PM PST

    PSA: Don't buy the PDU kit from gpuShack and probably best to avoid them in general

    Posted: 07 Feb 2018 06:26 PM PST

    In hindsight I probably should have known better than to buy from these guys but I bought the PDU kit here:

    https://gpushack.com/collections/gpushack/products/gpushack-power-distribution-kit

    What I got was a very used AP7841. The page doesn't mention it's used/refurbed. When I emailed them they told me it's mentioned on their About Us page. Sketchy.

    The other thing is the product description says you get: 1x APC AP7941 / AP7841 Rack PDU/Switched/Zero U/30A/200V/208V/220V/240V. The switched is the key bit here. This means you can remotely access the PDU and turn outlets on and off. It's pretty much why I bought the thing. Turns out the AP7841 isn't switched it's metered which means no remote control of the outlets just monitoring. When I asked about this the reply I got was: 'We have a random mix of AP7841 and AP7941, metered and switched, respectively. You got the metered version.' Awesome nice to know I got something out of your random pile of hardware.

    For the record you can buy AP7841s for $70-$150 used on ebay. The AP7941 goes for $150-$225 on ebay. I brought this up and the reply was: 'The pricing information you found is not especially relevant in this case, because the PDU is included in a kit, with all parts sourced for you. Any AP7841 you find online is not included in a kit.'

    The outlet included in the kit is a standard outlet you can get for $20 at Home Depot. The cables are like $3-5 each. The About Us page states that because their stuff is refurb they can offer 'deep discounts'. Deep indeed.

    I asked them to send me an AP7941 as an exchange or give a significant discount for the AP7841 and they pointed me at their refund policy which is to return it at my expense for an 80% store credit. LOL.

    I opened a dispute with Paypal. Hopefully it works out otherwise I got burned on this one. Just wanted to give you guys a headsup avoid these guys and get your PDU elsewhere.

    submitted by /u/astark052970
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    Mining ROI, don’t panic!

    Posted: 07 Feb 2018 09:23 PM PST

    In the past couple of days we've all experienced the doom and gloom of the market and some like me who has got into the mining during the recent bullish market or have long yet to make their ROIs; if your "expected" daily profit has recently dwindled and you're panicking, it's worth noting that your calculation on ROI should NOT be based on "i paid $X for the hardware and minus running costs making $Y profits daily, it must now take $X divided by $Y, number of days to break even."

    Any hardware bought has a resale value, let's say in a apocalyptic scenario 1/3 of the cost of what you paid for the goods. Find what the value of your capital is in the worst case scenario, deduct that from your Investment total, now you have a real-world figure to play with. Your break even should be calculated based on this new figure. For example if you expected to make let's say $4,000 investment back in 6 months on $22 daily profits on your rig when the prices were high and now its looking like over a year at near $11, taking into account the value of your capital, the new outlook is closer to 8 months.

    It's a very simple oversight to make for people who are not savvy with making business plans etc, or even if you are and sometimes you just don't think straight when you panic, this was just a reminder and my two cents...

    submitted by /u/AlienInNewTehran
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    Rock crawling a 6 GPU rig. EVGA 1060 6GB. I spent too much on the aesthetics of this rig but it is a talking piece with friends...

    Posted: 07 Feb 2018 04:38 PM PST

    mining with ryzen apus?

    Posted: 08 Feb 2018 07:40 AM PST

    Does anyone know if it will be possible to mine with a ryzen CPU, a vega iGPU and some GPUs at the same time? Wont be as profitable as a normal mining rig but it could be reused as a nice personal comp. like this https://www.anandtech.com/show/11359/biostar-am4-mining-motherboards with

    submitted by /u/SKVRluci
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    Riser power consumption

    Posted: 08 Feb 2018 07:34 AM PST

    Does a riser simply pass power along to the GPU, which the GPU would otherwise be getting from the motherboard (in other words, no overall increase in power consumption when using a riser vs not using one)? Or do risers actually consume power, in addition to what the GPU consumes, so that the additional power consumption of the actual risers needs to be factored in when predicting a rig's power consumption and selecting a PSU?

    Thanks.

    submitted by /u/sturdylemur
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    Quadro cards for mining

    Posted: 08 Feb 2018 07:06 AM PST

    Hey are professional cards like quadro m6000 good for mining? they have 24gb of vram and are aimed for extensive high end use.

    submitted by /u/f34rsum
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    Is there something wrong with the PowerColor RX 580?

    Posted: 08 Feb 2018 07:03 AM PST

    I have signed up for stock notifications for various high end cards, but I keep seeing this specific card across a few sites and it doesn't sell out in 30sec like all the rest.

    Is it a weaker 580? Is PowerColor a less desirable brand?

    I feel like I'm missing something about the card, and that concerns me because I've got one arriving tomorrow and I expect to pick a few more up if they keep popping up like they are.

    submitted by /u/Asphodan
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    Can't get second m.2 port working with GPU on asus H270-plus.

    Posted: 08 Feb 2018 06:59 AM PST

    I have two rigs - one is a z270 F, and I managed to get 2 extra GPUs working with the m.2 adapters - after lots of bios tweaks. It's running well.

    So I decided to do the same on my second rig which is an asus h270 plus, but, using the same bios tweaks, I can only get 1 of them to work. The second one isn't even showing in device manager in windows.

    In the bios, I have 4g decoding enabled, m.2 ports are set to pcie, pcie speed and dmi speed is set to gen 1 (this is the setting that made it work on the z270 f). I have tried multiple m.2 adapters in case it was a faulty adapter, I am sort of out of ideas now...

    Any tips or tricks? Has anyone managed to get both m.2 ports working with GPUs/adapters?

    submitted by /u/AcuteRain
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    Tips for a new miner

    Posted: 08 Feb 2018 06:21 AM PST

    TL;DR Any tips for an efficient starting of the mining and building of a mining rig, to cut on unnecessary down costs

    Hey there guys. I've been looking at this craze of mining and crypto currency evoution since 2014, yet I didn't have any money to join.

    Now I've calculated that with the current prices and with my electricity bills, I'll be able to easily run a 4 - 6 GPU rig. I'm assuming that it is best to find 1080s and 1080TI's for this purpose. I have an approximate ROI and I would like to do this, however I wan't to hear from more experienced guys like you on how to do it more efficiently.

    P.S. I have 3 cryptocurrencies that I believe I can mine at +- same efficiency and achieve similar profits, with ROI being in the 8 months (which I hope will decrease, as I believe there is another mining bubble coming up pretty shortly).

    submitted by /u/Dertroks
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    Where do heat go from gpu?

    Posted: 08 Feb 2018 05:57 AM PST

    I'm trying to built a venting solution for 30 gpu but can't really figure out where exactly the gpu fans blow the heat to, they are all 2-3 fan cards, not founders edition cards. Do the heat come out from the mounting metal plate? Or they rises above the gpu etc. ?

    submitted by /u/silvermist99
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    Smart mining pool: Whalesburg

    Posted: 07 Feb 2018 01:26 PM PST

    Check this new project, the mvp is working fine. Would like to know more opinions on the actual convenience but looks VERY good to me at the moment.

    https://whalesburg.com

    submitted by /u/FrancisFuture
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    What do you guys use to measure wattage?

    Posted: 07 Feb 2018 10:03 PM PST

    Biostar forces us to buy the H81 in set with BTC boards. Weired strategy

    Posted: 08 Feb 2018 04:01 AM PST

    Just got a call. I can get my 50 boards BTC pro (about 102$) but I also need to buy 50x Biostar H81.

    Very weired strategy of them. The H81 costs me about 54$, so I'll dump them for 45 locally. Strange strange mining market

    submitted by /u/kallebo1337
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    Compiling CCMiner for Linux. OpenSuse 42.2.

    Posted: 07 Feb 2018 09:24 PM PST

    I had a lot of trouble compiling CCMiner on OpenSuse 42.2. In the end it turned out I just needed Nvidia's original CUDA SDK from their site. After I downloaded the SDK; I just followed cwnage's compile guide. Once it's compiled, you just run the binary like the examples show for Windows (Just use the terminal instead of command prompt obviously).

    Here are the links:

    Tutorial: https://dashpay.atlassian.net/wiki/spaces/COMMUNITY/pages/8192009/Mining+Guide+-+NVIDIA+-+ccminer+on+linux

    CUDA SDK: https://developer.nvidia.com/cuda-downloads

    And here is the binary I compiled if someone wants to try and use it directly, I'm not sure if all the libraries are linked properly, but it might work: https://nofile.io/f/Ec6DTStKOa1/ccminer

    submitted by /u/bluemaned
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    Can MSI B350M Mortar use 4 GPUs?

    Posted: 08 Feb 2018 02:53 AM PST

    Hi, I'm unable to make the 4th GPU working with this MB. It seems that the second PCI-e slot (starting from CPU) can't pilot a GPU. I have searched in BIOS for a useful option but found nothing.

    Any idea?

    Thanks in advance.

    submitted by /u/cialu
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    Need input before firing up my first build

    Posted: 08 Feb 2018 02:35 AM PST

    Here are the parts list for the build.

    • CPU and MOBO - Asrock H81 BTC R2 with bundled CPU (on metal stand offs)
    • RAM - Generic 8 GB
    • GPU - 6x Galax 1060 OC (1 PCIE cable powers 2 GPUs)
    • PSU - Corsair HX 1200
    • Risers - 6 pin (powered with included 6 pin to SATA adapter - 2 risers per cable)
    • Frame - DIY wooden open air
    • SSD - kingston 120GB

    Here are the pictures: https://i.imgur.com/uDRaDBb.jpg https://i.imgur.com/qd67wmI.jpg

    Please give it the once over before I turn it on for the first time.

    Many Thanks

    submitted by /u/mitharandir
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    MSI 270 A-PRO 6 GPU, help needed !

    Posted: 08 Feb 2018 02:30 AM PST

    Hello fellow reddit miners.

    I need some help it's driving me mad, been struggling on this for 2 weeks straight.

    I am not that new to mining, been using antminer to mine bitcoin and a few gpu to mine several other altcoin for quite some time now. I recently decided to put more in GPU mining and bought several MSI 270 A-PRO, with 6 GTX 1060 each, the appropriate number of USB 3 risers, and everything else needed for this to work.

    I never seems to be able to get all 6 PCI slot to be recognised at the same time, it's driving me mad.

    What I did :
    - flashing the bios for latest version
    - installing windows 10 and ubuntu, UEFI
    - checking and switching between several power supplies 450 to 650 and mixes of both
    - trying each cards and each risers in the first PCI x16 slot, and they are all being detected and working there
    - installing, clean installing and reinstalling nvidia drivers several times
    - trying to plug the cards one by one, and all at once
    - of course, turning the crypto mining more than 4 cards detection to enabled in the bios, and also trying several combination of auto/gen1, gen2 and gen3 as well as several (mainly 32 and 96) bus speed setting in the pci subsettings

    What I get :
    - only the 1st (PCI *16) slot is realiably working with cards and risers, with the second one sometimes working but not reliably
    - the fourth slot, the pci *8 one, is working when I plug the card directly inside of it and not use riser
    - as long as most cards are in, only the first riser is detected, with the pci *8 port being active only without risers
    - I checked on the bios board explorer for card and risers detection everytime, as well as trying to launch the OS and pray for detection, no better luck than what is described above

    Would any of you have had similar issues before?
    I really hope someone will be able to help me sort this out, this is definitely driving me crazy as I cannot find any kind of similar cases anywhere, and all MSI 270 A-PRO users seems to be running their node fine.

    Many thanks in advance to any of you that may be able to contribute, and to those who will take at least the time to read !

    submitted by /u/Puniversefr
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    ProjectGTR Mining Software

    Posted: 08 Feb 2018 02:27 AM PST
    Read more
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