Posts Tagged ‘Ethash ASIC miner’

Silencing the iPollo V1 Mini Ethash/ETChash ASIC Miner Among Other Things

21, Nov 2022

A few days ago, we have shared our First Impressions from the iPollo V1 Mini Ethash/ETChash ASIC Miner and now it is time to dig a little bit deeper into this compact and pretty powerful home-oriented miner. One of the first things that came to mind when we have opened this 300 MH/s Ethash/ETChash ASIC miner was how to try and make it silent while working. Nano Labs have made very good job in making this a very compact and sturdy device that is well built and works under even more adverse conditions. However due to the small size they made a lot of custom things inside the miner which makes it a bit of a problem to work around them trying to modify the device like when trying to make it silent yet cool.

We’ve already discussed the server style heatsink that is used that unfortunately is not any standard size for mounting on the ASIC chip and for cooling fans. The small and powerful 60mm cooling fans found inside are managing to keep the device cool, but making it a bit noisy even when they are running at sub 5000 RPM (they can go up to 7000 if needed). And if you want to use this at home in your living room or any other room where people will be present the noise level with the fans running at automatic mode keeping the miner at around 50 degrees Celsius will be noisy. So what can be done?

Two 60mm fans, how about replacing them with a single 120mm fan and will that keep things cool enough. Well, you can do it with a single 120mm fan, but you will have similar noisy miner just like with the default 60mm fans. The reason for that is that fins of the heatsink are only about 60mm tall, so essentially half of the 120mm fan will not be utilized thus half the efficiency. If you however do two 120mm silent fans such as Arctic Cooling F120 or P120 in a push-pull configuration on both sides of the heatsink you will manage to get a pretty silent operation and enough airflow to keep the miner cool at around the 50 degrees Celsius level. Unfortunately, the fan mounting is not very easy and you are still going to be wasting half of the fan’s airflow due to the low heatsink used by the miner. And another possible problem with this setup is when the ambient temperature rises above 25-30 degrees Celsius, it would be a problem for already maxed out F12/P12 fans to keep the ASIC operating at around 50 degrees C.

What comes to mind here is to use a larger 140mm fan instead with higher airflow and stack two of the iPollo miners on top of each other so that you will get the 140mm fan cover both miners and provide enough airflow. This should work pretty well in theory, though we are currently unable to test it as we only have one iPollo miner available. But there is another catch, the inside metal frame that holds the boards of the miner is just a bit shy of being able to properly fit a 140mm fan inside, so you need to remove the metal frame and that results in exposing a lot of the PCB. You would need to think of a custom case in order to secure things and it better be metal in order to prevent any possible interferences for the WiFi signal (if you are using the WiFi module). This could however work out very nicely in making a single 600 MH/s device cooled by a single or maybe dual Arctic Cooling P140 or Noctua NF-A14 fans (push-pull dual fan setup should work pretty well). We need to secure another iPollo miner to continue working on that idea, but if you have more than one such device already and are feeling up to the task you might work on it as well and share your results.

When we initially shared out first impressions from the iPollo V1 Mini Ethash/ETChash it did not work with Nicehash, but at pretty much the same time the platform has just announced that iPollo will actually work on their platform. All you had to do is add “--nicehash” (without the quotes) in the More Options field in the Miner Configuration page in the web interface. And do not forget to remove the option from there if you are switching to another mining pool as will not connect to other pools if you forget the option there. You can also try additional commands here that will be passed directly to the back-end miner software (more details on that below), however you cannot monitor the output from the mining software directly through the web-based interface of iPollo.

Another useful thing here is that the particular gold iPollo V1 Mini ASIC miner is equipped with 6GB of memory (the Classic series of V1 miners from iPollo are with just 4GB!), so you will be able to mine ETH with it. Furthermore, iPollo miners do support dual mining ETH/ETC and ZIL, so some extra profit if you are mining a compatible Ethash or ETChash coin along with Zilliqa. Check out this post on Dual Mining ETC, ETHW or ETHF plus ZIL For Better Profit if you have missed it, the 6GB iPollo miners are able to mine the ETH forks that split at the Merge when Ethereum switched from PoW to PoS as their DAGs are a bit over 5GB currently.

Further digging into the iPollo miner we connected to the device over SSH, it has full root access with root:root as username and password, so if you want to explore and play around with it you can get to it. We’ve quickly discovered that iPollo uses a modified version of cgminer so good news for anyone that is familiar with this old school miner and its wide array of options that can be used, but might not be implemented in the web interface of the device. There are some interesting extra commands available for the miner’s cgminer (note the nicehash option and the poolhub one), though they are not documented and the option for setting the voltage does not seem to work, but you might want to try to explore more, so here they are:

--ipollo-hmode iPollo hash mode(0:1.1v, 1:1.2v)
--xignore xcmd ignore the local target check
--xhrate xcmd hashrate for suggest difficulty from pool
--xfacworker xcmd worker name for fac test
--xndiff xcmd native difficulty for the chips
--xcmpll xcmd cmp setting
--xcmp4w xcmd cmp4w setting
--xcv xcmd cv setting
--xkey xcmd key setting
--xse xcmd se setting
--nicehash xcmd support nicehash stratum
--poolhub xcmd support poolhub stratum
--xigncc xcmd ignore chips with capacity

Here is the default command line that is used for dual-mining ETC + ZIL using the cgminer through SSH if you want to experiment and most of all to be able to see the full miner output… something that is kind of lacking in the web-based interface even though you have three different logs available for viewing:

cgminer --lowmem -a etc --ipollo-fans 1-100-50-100 --xndiff 28 --ipollo-hmode 1 -o us-west.ezil.me:4444 -u ETC_WALLET.ZIL_WALLET.WORKER_ID -p x --api-allow W:127.0.0.1/8,W:10.0.0.0/8,W:172.16.0.0/12,W:192.168.0.0/16 --api-listen

Just make sure that you have you ETC_WALLET, ZIL_WALLET and WORKER_ID set in the command line above in order for the miner to actually start mining to your address. Also, since cgminer will probably already be running once you connect to the miner over SSH, just make sure to first stop it with “killall -9 cgminer” (without the quotes). There is a process monitor that will fire up cgminer if you don’t start it up for a while after you kill the process. Happy digging and don’t forget to share any interesting findings with the rest of us…

First Impressions from the iPollo V1 Mini Ethash/ETChash ASIC Miner

15, Nov 2022

We got a hold of a nice little golden iPollo V1 Mini Ethash/ETChash ASIC miner and decided to play around with it to see why so many people like these small home-oriented high-hashrate and low-power ASIC miners with support for the Ethash and ETChash algorithms. You might be able to score a good deal on used iPollo V1 Mini now that these devices are not that profitable like they were during the time when you could mine Ethereum (ETH) with them and they can still come in handy in the next bull run or meanwhile if you mine some Ethash or ETChash coins meanwhile. The nicest thing is that they are very compact, not that noisy in general and very power efficient compared to what a GPU mining rig would use to give you the same hashpower. And they do come with WiFi adapter built-in, so once you set them up they are easy to move around the house or apartment as you would only need to plug them in a power socket in order for them to start hashing, no need to use network cables, although you can still if you want to.

Now, let us start with a little clarification as iPollo does offer two sets of V1 ASIC miners, one is described as ETC Miners and have the word Classic in their product names. These are iPollo V1 Mini Classic (130 MH/s at 104W) and iPollo V1 Mini Classic Plus (280 MH/s at 270W) with both devices having a design memory of 3.75 GB out of which the available memory for use is 3.6 GB. This means that these devices can mine Ethash or ETChash coins that have up to a 3.6 GB DAG size. There is also the iPollo V1 Classic (1550 MH/s at 1240W) with the same memory limitation available, but that one is big and noisy and not very suitable for home mining anyway.

The other ETH Miner category is similar in terms of hashrate and power usage or more efficient, but these devices do come with more memory available. The design memory is 6.0 GB of which the available memory for DAGs is 5.8 GB, meaning that you can mine even Ethereum (ETH) forks such as ETHF or ETHW that have DAG size of over 5GB already. Ethereum of course is no longer available for mining since it has switched from PoW to PoS. But if you get the iPollo V1 Mini (300 MH/s at 240W), the model we are looking at and testing here, or the more efficient iPollo V1 Mini SE Plus (400 MH/s at 232W) or the smaller iPollo V1 Mini SE (200 MH/s at 116W) you should be safer on the longer term on what you would be able to mine many more Ethash or Etchash coins passing the 4GB DAG size in the near future. There is also the iPollo V1 (3600 MH/s at 3100W), but just like the similar Classic counterpart this one is big, noisy and quite expensive for the regular home miners anyway.

As you probably already guessed, after checking that the device works fine, we opened it up. The iPollo V1 Mini ASIC miner is quite compact and comes with an external 12V power supply with a maximum rating of 360W (2 lines rated at 180W each) with two 6-pin PCI-E power connectors coming out of this passive Huntkey PSU. You need to plug in the two 12V power lines into the miner that has a power usage of 240W and that should be fine for the wires and the miner. The 6-pin PCI-E power connectors are normally rated at 75W, but good quality ones are able to handle 100W or more usually. There could be problems however if you try to use a 6-pin PCI-E power connector for a 150W or more as it usually starts to overheat and burns up due to being significantly overloaded.

The power supply is quite good, although it gets hot when mining it is very efficient and provides stable power to the miner. The power usage we have measured with the stock power supply is around 50W for the miner while getting ready to mine and around 244W at the wall when mining begins. Connecting a 1000W Platinum rated Corsair power supply resulted in 249W of power usage while mining (4-5W more due to the extra 5V line power consumption the Corsair has).

Due to the compact size of the miner the manufacturer Nano Labs has decided that they could use two small 60mm size fans with high-rpm to provide the cooling for the miner. And while these fans do their job very well, at maximum RPM they are quite noisy (around 7000 rpm), though with the fan control and normal operation they go down to a sub 5000 rpm and the noise is much more acceptable. With the maximum speed of the two cooling fans you are going to be getting around 64 dBA noise level while with them running normally with the miner operating at around 50 degrees Celsius and the fans at around 4800 rpm the noise level measured is around 52 dBA and that is much more acceptable, though still not very silent. The two fans used are from a Chinese manufacturer called Ebonda and are rated at 0.8A at 12V. We are of course going to try and optimize the cooling and see if this miner can be made more silent, but that will follow in another post.

The cooler of the miner is a large aluminium copper block that seems like a server type heatsink, but does not seem to be a standard sized one… the mounting hole distance, the protruding copper block and not centred placement of the screws make it seem like a custom design. Would’ve been nice if you could just mount a good tower-based CPU cooler to make cooling easier and less noisy, but that would not be an easy task – certainly not as easy as juts replacing the heatsink and fans. The miner itself consists of two boards with a pin header connection between them. The bottom one is the control and power board and the top one is the hashing board with a single large ASIC chip. BTW after disassembling the miner with replaced thermal compound using Arctic MX4 thermal grease we’ve seen about 1 degree Celsius drop in the operating temperature of the miner.

The Nano Labs V66H ASIC single chip is apparently capable of 300 MH/s Ethash/ETChash hashrate with a power usage of around 200-ish Watts of power usage, no exact specs of the chips. These are easy to scale with big hashrate miners if you just increase the chip count. Though apparently efficiency could be further improved judging by the specs of the Mini SE and Mini SE Plus miners that provide even better power efficiency. Nano Labs’s iPollo Ethash/ETChash ASIC chips might not be the most power efficient in the bunch, but they do seem to perform quite competitively and the 6GB of memory is a plus as well. Not to mention that these miners do come with support for dual-mining with ZIL, so a little extra profit added by that as well, a profit that may allow the devices to successfully compete with higher hashrate products with lower power usage such as Jasminer X4.

The iPollo V1 Mini ASIC miner comes with a simple and easy to use web-based interface for monitoring and control of the device, there is also the iPolloTool software for Windows that allows for easier setting up and monitoring of multiple miners at once. The average reported hashrate we are seeing for the iPollo V1 Mini is around 300 MH/s with an operating temperature at around 50 degrees and fans at around 4800 rpm. At 244 Watts of power used and with 52 dBA noise. So, the claimed specifications are pretty much what you should expect to get in real usage.

The miner supports both ETChash and Ethash mining and dual-mining with ZIL as well. There is however a catch with the dual mining support, the latest dual-mining firmware is not yet available on the official firmware upgrade package yet, but you can download firmware version 0.76.96 from RabidMining. There does not seem to be support for Nicehash mining on the iPollo out of the box, although NiceHash just posted how to enable support for mining with iPollo. The 6GB memory onboard allows for a decent future-proof capability of the device (be careful with the 4GB models!). It takes about 4 minutes for the miner to get ready to mine ETC once you boot it up, so quite quick on that front compared to Jasminer X4 where you will need to wait about 20 minutes.

There is a user fan control option available with both manual and automatic modes available for the user to configure. And there is also a Wireless network setup in the web-interface that you need to use to connect your device to a WiFi network. The first time you run it needs to be connected with a network cable so that you can setup the Wifi, after that it will just connect to the wireless network you set it up to use automatically. There is unfortunately no control for operating frequency or voltage available, so no user options available for trying to optimize the device for better power efficiency or faster hashrate for example. The available logs in the web interface are not very usable as although there are three different logs available for you to monitor through the web interface neither one of them is the cgminer output for the actual mining process (the device uses a modified cgminer as mining software).

So, all in all, the iPollo V1 Mini Ethash/ETChash ASIC miner is a nice compact home miner for anyone interested, it works well, pretty versatile and performs as expected… there is of course more functionality to be desired, so room for further improvement. If you are looking to get one of these look for some sub $1000 USD deals.

– For more about the iPollo V1 Series of Ethash/ETChash ASIC miners…

Trying to Further Optimize the Jasminer X4 1U ASIC Miner

5, Nov 2022

We’ve been playing around with a Jasminer X4 1U Ethash and ETChash ASIC miner for a couple of days now and we have some more things to share with you if you are interested in the device. We’ve already covered some interesting findings and possible tweaks for the Jasminer X4 1U ASIC miner here, but we continued further trying to optimize the miner and see if we can squeeze a bit of extra performance from it. Our next obvious step was to disassemble the hashing board with the ASIC chips…

Removing the aluminium cooling heatsink, a single piece for the whole board, revealed the eight Jasminer X4 ASIC chips on the hashing board along with a controller chip and two memory modules. And a ton of thermal grease that needs to be cleaned and replaced before assembling the whole thing back again. Only the controller chip is not covered with thermal grease, instead it uses a thicker thermal pad for contact with the heatsink. All of the chips did have a good contact with the heatsink, so supposedly no expected issues with thermal transfer and cooling here. So, our hopes of getting a bit of thermal improvement by replacing the thermal compound with a better one would probably end in vain, but since we still have to replace the thermal interfacing material we’ll do it.

Cleaning up the whole thing properly does require some time and effort as due to the size of the crystals on the Jasminer X4 ASIC chips it is like cleaning 8 CPUs of computers. And you need to make sure you are careful not damaging anything, though the cleaned-up board and chips do like quite good. We are reusing the original thermal pad for the controller chip as we do not believe it is necessary to replace that one with a more efficient one anyway.

The main controller chip on the hashing board is a Trion T120 FPGA along with two DDR3 memory modules right next to it (no, that is not how 5GB of memory looks like!). This is the controller chip for the Jasminer X4 ASIC chips that is being used on the hashing boards, the miner does have a second FPGA controller chip with separate RAM chips on the main control board that hosts the software and web interface of the miner, there however we find a Xilinx Zynq chip.

Here is a single of the eight Jasminer X4 ASIC chips in a 45×45 mm package (678 square millimetres die size) with 1TB memory bandwidth, 5GB of memory and a hashrate per chip of 65 MH/s with each of the chips having 384 computing cores and 384 on-chip dies according to the manufacturer with a 512-bit bus width, an operating frequency of 800 to 1 GHz and a power consumption of 23 Watts.

We’ve used the Arctic Cooling MX4 thermal compound to cover the chips before reassembling the hashing board with the aluminium heatsink. It is a decently priced high-performance product that we like to use along with Noctua’s NT-H1 due to their great price/performance ratio, and there does not seem to be much point to try and use more expensive solution anyway. When applying other thermal compound make sure to put a little more on the memory chips as there the gap with the heatsink is a bit more compared to the one of the ASIC chips.

We’ve compared the hashrate and operating temperature of the Jasminer X4 1U ASIC miner before changing the thermal compound and after doing so, leaving the device to hash for more than 10 hours in order to get a good average of the operating temp and hashrate. Do note that this is our already silent modified unit with replaced fans and firmware, so your device might report a temperature range and not a single number. The before and after results are very similar, pretty much the same average hashrate and just 1 degree Celsius difference, so there is really no need to play around with the thermal grease as it will not give you much of an improvement. We also did a power usage measurement before and after at the wall, the results there were not much different as well – 266.1 W before and 265.7 W after the thermal grease replacement.

The next thing we wanted to try out here was to use a different power supply than the one the Jasminer X4 1U comes equipped with. There are three obvious reasons to replace the PSU – to see if the 300W of the stock one might be a limiting factor, to use a silent power supply and to possibly get a lower power consumption. We’ve connected a 1000W Corsair HX1000i power supply (Platinum efficiency rating) to the ASIC miner in place of the stock PSU and unfortunately the results were not really that encouraging. You get a silent power supply as the HX1000i runs passively at sub 300W of power usage, but the power consumption measured at the wall was 263.7 W or just 2 Watts less compared to the stock PSU.

The other thing we wanted to check with the more powerful power supply was if the Jasminer X4 1U would be able to run at 250 MHz operating frequency with the new thermal interface material in place and more than enough power. Unfortunately, our miner continued to dislike the 250 MHz operating frequency returning a lot of errors trying to hash and thus effectively operating at a fraction of the actual performance you get at 225 MHz where everything runs stable and without errors. So, the fact that at 250 MHz the mining device uses almost 300 Watts of power measured at the wall does not mean that the stock PSU is not able to handle that. And we do not think that the cooling of the ASIC chips is also an issue here for them not be able to run properly at 250 MHz.

Jasminer X4 does come with a very good thermal grease already applied, so no need to replace it. The stock 300W PSU is also really good in terms of efficiency and is not limiting you running the miner at higher clocks. The only thing is that the stock power supply is quite noisy and you might want to modify or replace it if you are making your miner into a silent one like we did with ours. It seems that Sunlune already did very well with the hardware side of their Jasminer X4 ASIC miners, both in terms of efficiency and performance. What they could work a bit more on however is the software side as their devices do not currently support dual-mining ETH/ETC-based coins along with ZIL, something that could easily bring the miners an extra 30-40% profit. The lack of this feature means that a competitor with dual-mining support already available can easily provide the same profitability with a cheaper device that has lower hashrate and/or is not as power efficient as the Jasminer X4.


top