Building a Simple Mining Rig Restarter with Raspberry Pi

Making your own solution for restarting a mining rig that has frozen is relatively simple for pretty much anyone, you just need a Raspberry Pi board and a couple of 5V relay boards and you can be up and running in no time. You can use the base RPi operating system and with the help of WiringPi you can get easy control of the GPIO pins of the Pi, even direct console one with the GPIO utility. Of course you can install a web server with some basic visual interface as well, simple buttons to drive on/off the relays connected to the GPIO pins of the Pi board.

If you have a spare Raspberry Pi 3 you have up to 28 channels available to drive on/off relays, though based on our experience only 25 of the GPIO puns are actually reliable usable. Pins 2, 3 and 14 have a bit of erratic behavior being in high (triggered state) when the Pi board boots up or temporary switching on and then off when rebooting the board, so it is wise to skip them. Another possible issue is the GPIO pin 0 (the bottom white one) as using zeroes can be tricky when programming something, so be careful with that one as well. We have been using the relays to short the on/off button on the motherboard forcing the mining rig to shut down and then start up again. This works surprisingly well and you avoid the need to work with the high 110V/220V mains power going through the relays that can cause problems for not so experienced users. Our latest setup relies on driving 18 rigs though a single RPi 3 board, so we have a couple of spare channels available for extending the functionality of the controller further if we need to.

So if you are looking for relatively cheap way to get remote control over the power of more mining rigs that are not easily rebootable otherwise you might want to start playing with Raspberry Pi and relays. It is not so cheap for just a few rigs as you need to buy a Pi 3 board, but once the number of rig rises the cost per system lowers. You can always start with a few and then add extra systems if needed, again you should have no problems driving up to 25 systems through the GPIO pins of the RPi 3. There are of course other commercial solutions also available for you to purchase that have been developer by miners for miners such as the SimpleMining SimpleRigResetter that we have talked about last year and now there is apparently a new version of the device already available, though it seems to be out of stock at the moment.

Counterfeit Nvidia GTX 1080 Ti Cards Out in The Wild

We should start that what you see in the video above is not a joke, it is real and what we got with an order of GTX 1080 Ti video cards from a reputable European online retailer. Three seemingly brand new Nvidia GeForce GTX 1080 Ti video cards ended up with surprising contents, scrap metal instead of the GPUs we expected to find inside. The video cards seemed like brand new and unopened, they were GTX 1080 Ti Founders Edition from Gigabyte, all boxes packed with a nylon and with stickers on the boxes as you can see on the video. Yet when you open them up you end up with a surprising content and definitely what you would expect to find inside the box of such an expensive GPU…

Some supplier on somebody on the supply chain has apparently made quite the effort to make these as aside from packaging the boxes to make them seem like new, the contents was made to be the exact same weight as the original box with a real card inside. Obviously the retailer does not open the boxes to check if they contain the correct item, but they can easily weight the boxes and confirm if there is something wrong or not without opening the box. The actual video cards will find their place on eBay or any other place for selling them or maybe they will get used for mining.

Putting pieces of scrap metal with additional lead weight and packaging them in a way that they will not make strange noises when handing the box, some effort to make a counterfeit Nvidia GTX 1080 Ti. Then repackaging the whole thing and shipping it to the seller that in turn sends it to customers and in the end you get an angry customer that is no way happy with what he gets instead of the GPU he expected and paid for.

You may find different prices of scrap metal inside the box, but each one is well made in order to avoid possible suspicion of an issue like metal parts hitting and making strange noises or the package being too light or too heavy.

Of course buying from a reputable retailer will get your problem with the scrap metal instead of GPUs resolved with some extra headaches and time, so nothing too serious besides the bad surprise. Regardless if you are buying GPUs for mining or for gaming, just be careful that you do not buy online from places where returning the items if you end up with a problem like ours will not be an issue.

We Got Our Hands on an AsRock H110 Pro BTC+ 13x GPU Mining Moitherboard

Thanks to AsRock we already have a sample of their new H110 Pro BTC+ crypto mining motherboard with 13 PCI-E slots for testing, so you can expect a review soon. The motherboard should start appearing on the market sometime later this month, so it is not yet available in the retail channel. It is a really interesting design and definitely something that AsRock had to do in order to “show muscle” after the competition in the crypto mining motherboard space started to heat up with shortages of the hugely popular AsRock H81 Pro BTC and other brands like Biostar announcing multiple new mining motherboards.

The AsRock H110 Pro BTC+ motherboard is pretty interesting with the 13 PCI Express slots available for use with video cards with the help of PCI-E extenders, but this also comes with some challenges. Initially we got information that the motherboard should work out of the box with 13 GPUs under Windows and Linux, and although that might be true indeed there seem to be some limitations. It seems that the 8x GPU limit is still a problem, however you should be able to run 8x AMD with 5x NVIDIA GPUs under Windows, but not all 13 from the same type out of the box (it could still be possible to overcome this limitation). For Linux users 13x GPUs do not seem to be a problem or at least thirteen ADM GPUs with the ethOS mining distribution.

Building a 13x GPU crypto mining rig could also bring some other challenges including problems with the power supply or to be more precise power supplies now that there are shortages and it is hard to source higher power models. Of course it depends on the type of video cards that you are using for your mining rig, but in general the new H110 Pro BTC+ crypto mining motherboard from AsRock seems to be more useful for builds that have mid-range GPUs and not high-end ones. Builds such as 13x AMD Radeon RX 470/480 or RX 570/580 that use single PCI-E power connector or Nvidia GTX 1060/1070 again with a single PCI-E power connector (sub-200W power usage) seem more reasonable. To help with the power supply limitations AsRock has even included a dual power supply adapter cable/module in the retail box, though for three or more power supplies you would still have to find another solution.

Imagine what a challenge it will be if you want to build a mining rig with 13x Nvidia GTX 1080 Ti GPUs. At 250W for 100% TDP per card you are looking at 3250W of power required just for the video cards, there are simply not much options for dual PSU setups that can handle that, so it is more at least a three power supplies setup. In this configuration it is not just the power requirements, but also the number of PCI-E power connectors that you would need for the video cards. You would need 13x 8-pin PCI-E power connectors and 13x 6-pin PCI-E power connectors, then also 13x 4-pin Molex connectors for the PCI-E extenders. You also need to be careful not to overload any of the power lines of the power supplies by connecting too much components on to a single cable.

– You can check the official AsRock H110 Pro BTC+ product page for more details…

Sapphire Also to Release AMD-based Crypto Mining GPUs

Not a lot of details about the upcoming AMD-based Crypto Mining GPUs from Sapphire Yet, though they have been already listed for pre-order over at Overclockers UK. There are four Sapphire Mining Edition video cards listed that are based on AMD’s Radeon RX 470 GPU with different video memory configurations, all of which are without external video connectors. There is also a single AMD Radeon RX 560 GPU also labeled as Mining Edition, though it is a bit different with a single DVI connector on the back, so it can be used for other things than just crypto mining. It is interesting to note that the Sapphire Mining Edition cards do come with 1 year warranty instead of the regular two or even 3 years warranty that Sapphire cards targeted at gamers usually have (depending on the market).

Sapphire Mining Editions cards:
– Sapphire Radeon RX 470 MINING Edition 8192MB GDDR5 Samsung 7 Gbps (11256-38-10G) – 25-28MH/s ETH
– Sapphire Radeon RX 470 MINING Edition 8192MB GDDR5 7 Gbps (11256-37-10G) – 24-27MH/s ETH
– Sapphire Radeon RX 470 MINING Edition 4096MB GDDR5 Samsung 7 Gbps (11256-36-10G) – 24-27 MH/s ETH
– Sapphire Radeon RX 470 MINING Edition 4096MB GDDR5 7 Gbps (11256-35-10G) – 23-26 MH/s ETH
– Sapphire Radeon RX 560 Pulse MINING Edition 4096MB (11267-11-10G) – 12-15 MH/s ETH

It is interesting to note that the store lists the type of memory on different models and what mining performance they will be able to offer for mining Ethereum (ETH). There are two values that apparently represent the stock and the modified BIOS result, though it is not yet clear if the dual BIOS comes with modified settings, or Sapphire has just left that part to the miners. Unfortunately the prices listed for pre-order are not making these very attractive alternative compared to the regular models, though with the current shortage miners may not care that much as long as there is stock of these new Mining Edition cards from Sapphire available.

Something that is important regarding the warranty of regular Sapphire GPUs that are not originally intended for mining, the website of the company has some additional terms listed about mining usage, here is a quote below.

Warranty may vary from Country/Region, the customer must verify directly with the SAPPHIRE Authorized Dealer/Reseller from where the product was purchased as to the specifics of Warranty provided.

Warranty also varies for products used in Industrial , Block chain and crypto currency mining applications and the customer must verify with the SAPPHIRE Authorized Dealer/Reseller from where the product was purchased for more information.

So make sure you check the warranty information of the seller whether you are buying regular gaming GPUs or any of the Mining Edition cards to make sure about the warranty period you get with each. We have already received reports form users that some retailers are selling GPUs without any mention about warranty getting void on their websites if they are being used for crypto mining and you get that told to you after you purchase the cards and have them shipped to you.

New Optimized Ethminer for Nvidia GeForce GTX 1060 GPUs

There is a new development version of the ethminer 0.11.0rc1 (source) available that brings CUDA performance improvements especially optimized for GTX 1060 GPUs. People are reporting a couple of megahashes increase in the performance of GTX 1060 GPUs over what they are getting with the same settings from Claymore’s ETH miner, some slight, but less performance improvement is observed in GTX 1070. Unfortunately it seems that the performance optimizations submitted by David Li don’t do much good for GDDR5X GPUs like the GTX 1080 and GTX 1080 Ti.

Feel free to test it on your Nvidia mining GPUS and report what and if there is some improvement in the hashrate over your previous settings. If you do make sure you try different value for the --cuda-parallel-hash command line flag (default value is 4), but you can experiment with 1, 2 and 8 and see what works best for you. Again the highest benefits are apparently observed on GTX 1060 GPUs as the performance optimization is apparently targeted at them, though some other GPUs might still benefit a slight boost as well. You can download and try the Windows binary compiled from the latest source below.

– To download and try the CUDA optimized new ethminer 0.11.0rc1 for Windows…

ASUS Mining P106 is a GPU for Crypto Currency Mining

VGA card manufacturers seem to have finally started taking care for the crypto mining market that has been growing significantly lately due to the high profitability for crypto mining. ASUS, one of the top brands not only for VGA, but for other PC components as well has announced their Nvidia GeForce GTX 1060-based mining video card and the product is called ASUS Mining P106. We have already talked about Nvidia’s plans to release a crypto mining oriented GPU for miners based on their GTX 1060 GPU. Originally the plan was to have this product on limited markets and not available in the retail chain, but it seems that this plan can change with ASUS and other VGA brands joining with products that can become available through the usual distribution channels as well.

The ASUS Mining P106 is based on the NVIDIA P106-100 GPU and comes with 6GB GDDR5 that has probably been modified with custom timings in order to increase the hashrate for more memory intensive mining algorithm such as Dagger-Hashimoto (Ethash) used by Ethereum. The GPU Base Clock is 1506 MHz and the Boost Clock is 1708 MHz, the video memory is 8008 MHz GDDR5. The initial information was that the NVIDIA P106-100 GPU should be based on the 9 Gbps version of the GTX 1060, though this might still be true with the memory is apparently at 8 Gbps with more aggressive timings. As expected the ASUS Mining P106 GPU does not feature any kind of video outputs so it is essentially limited to only computing tasks such as mining and will not be an interesting product for gamers that might also want to mine, but still be able to play games.

Other interesting features on the ASUS Mining P106 include the dual ball-bearing fans that are IP5X-certified to be dust resistant and thus offer a longer fan lifespan and this is really important as far as crypto mining goes. ASUS also claims that they have used components that enhance efficiency, reduce power loss, decrease component buzzing under load, and lower thermal temperatures for unsurpassed quality and reliability. There is no mention about warranty period as initially Nvidia had plans to offer their mining GPUs with just 3 months of warranty, though we are hearing that other brands such as ASUS might actually be with 1 year warranty. No word about pricing either, though the mining GPUs should be cheaper than the consumer version of GTX 1060 in order to be more attractive to miners and we are probably going to be seeing them starting to appear on the some markets sometime next month.

ASUS has also announced a second GPU targeted at miners, but that one is really not that interesting like the NVIDIA P106-100 GPU is. The ASUS Mining RX 470 is essentially a standard AMD Radeon RX 470-based video card with 4GB video memory at 7000 MHz, there is no word about improved timings for mining that will result in better performance. The design of the AMD mining GPU is very similar to the Nvidia mining model, though here you have video output connectors and cans till use the card for gaming if you want to. The fans are the same and ASUS claims that the same improved components are being used to offer better reliability for longer term mining usage.

– To get more details about the ASUS Mining P106 GPU on the official website…

How to Keep an Eye On Crypto Token ICOs

Crypto Token ICOs (Initial Coin Offerings) are not slowing down and if you need to be able to get a better understanding on the ones that are more interesting and seem more promising, then you need a resource to help you get a better understanding and have a handy calendar when and what is launching and how long it will be available. One such service that we find useful is TokenMarket as it provides information for tokens and crypto currencies launching ICOs, they also have a calendar to help you keep track what to expect and when. Of course you still need to do a proper research in any ICO that you might be interested in, read the Whitepaper, check the Roadmap, see if there is actually something already available to as a products or service (even a prototype or alpha version) and so on. Just like with crypto currencies the advice to not invest more than you can afford to loose in ICO tokens is even more on the spot.

– To check out the TokenMarket website and what information it provides…