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Innosilicon A2 Terminator Scrypt ASIC RPi OC Mod

15, Aug 2014

a2oc-modified-web-interface

Innosilicon still has not made any release of the source code of their cgminer fork with support for the A2 Scrypt ASIC chips, what you get with their A2 Terminator Scrypt ASIC devices is a Raspberry Pi with a preloaded cgminer and simple web interface to control the device. The standard web interface however is a bit limited in the supported operating frequencies – 1000 and 1200 MHz. The recompiled cgminer does allow for a few more operating frequencies to be used, however they are not selectable by default through the web interface of the miner. Some time ago there was a modified image released by a user called Emdje that supposedly allowed more overclock options. However it has turned out that it was not really functional as even though you could select operating frequency at steps of 5 MHz the cgminer did not accept these values and instead defaulted to some of the supported frequencies.

Back when we first had the chance to do a remote test of a A2BOX Scrypt ASIC miner we have discovered that the only supported operating frequencies by the Innosilicon A2 Terminator Scrypt ASIC miners are: 1000, 1080, 1100, 1200, 1280, 1300 and 1400 MHz. This is why we have made a modification to the standard RPi image that ships with the A2 miners, so that you can quickly and easily add the supported frequencies to be selectable from the web interface of the miner. This should allow you to squeeze some more extra performance from your device, regardless if it is the smaller 2 module or the large 6 module ASIC model, as our tests have shown that most of the miners should be able to work pretty well at up to 1280-1300 MHz up from the maximum of 1200 MHz that you have by default. Below you can download the modification we have prepared along with the instructions on how to update your miner, so that you get the extra OC options available.

How to login to your miner via SSH/SFTP using putty/WinSCP:

– username: pi
– password: innosilicon

Where to find the miner and web interface:

/var/www

Replace the index.php file with the following modification:
– modified index.php

All that is left is to refresh the webpage with the miner interface and you should see the new options for operating frequencies available in the dropdown boxes for the A2 modules. For the smaller miners you need to select just the first two frequencies as you can see on the image above, for the large A2 miners you need to set all of the six frequencies. Do note that each of the modules can operate at a different frequency, so experiment and set the best frequency for each one that gives the lowest HW error rate and optimum performance.

KnCMiner Titan Scrypt ASIC Miner Status Update

14, Aug 2014

kncminer-titan-scrypt-asic-miner

KnCMiner has released an update regarding their upcoming Titan Scrypt ASIC miners, according to the manufacturer they are already finishing the first run in fabrication of the chips this weekend with wafers being sent to the next step: encapsulation. After that the finished chips will be sent to Stockholm, Sweden, where they’ll move into the testing and assembly phase, and then the finished miners will be prepared for delivery. The company has also announced that the Titan chip will use a PCB (board) with the same physical dimensions and footprint as the ones used by the Neptune SHA256 ASIC miners, while requiring substantially lower wattage as well as the same new modular design system for the miner itself.

So it seems that KnCMiner will be able to meet the Q3 delivery schedule for the Titan Scrypt ASIC miners, with the company probably starting to ship the devices sometime in September. That however does not come as so good news for the people that have pre-ordered the miners early expecting to be able to make a quick ROI and get some nice profit. With the current Litecoin network difficulty that continues to increase all the time and the not so good market price for the LTC at the moment even getting a return of the initial investment seems like a hard to achieve goal, let along to make some profit. That is of course if the market conditions continue to be unfavorable for the Scrypt ASIC miners – increasing difficulty and declining price of LTC. The fact that we are still probably a month away from the Titans starting to get into the hands of miners along with the fact that other ASIC manufacturers also expect to have products ready for delivery by that time does not make things seem so bright for the customers expecting their Titans.

Review of the ZeusMiner Blizzard X6 Scrypt ASIC Miner

13, Aug 2014

zeusminer-blizzard-x6-1

ZeusMiner Blizzard X6 is the smallest of all new lower power usage Scrypt ASIC miners from Zeus, it is the successor of the previous Blizzard units, but unlike the bigger models this one actually has more chips running at lower frequency. The end result is higher hashrate of the new unit as compared to the performance of the older miner that also comes with higher power consumption. The old Blizzard units offered 1.3-1.4 MHS with 6 chips at about 50 Watts of power usage, the new Blizzard X6 uses 24 chips at lower operating voltage and frequency and should provide 4 MHS at 100W. This means almost three times the hashrate with just two times the power usage, so it does not sound like a bad improvement. It is interesting to note that the Blizzard X6 was initially announced at 3.6 MHS and now the official specifications state 4 MHS.

zeusminer-blizzard-x6-2

Unlike with the older Blizzard that included a PSU and USB cable in the package, the new ZeusMiner Blizzard X6 does not include these anymore. We have received our unit with just the miner, no micro-USB cable in the package or a power adapter, not even a 4-pin Molex or 6-pin PCI-E adapter for powering the device with an ATX power supply. This left us a bit disappointed, but was probably done to save costs and make the price of the miner lower. We could’ve gone easily without a PSU, but the USB cable and a connector for a computer PSU is something that must be in the package as not everyone will have these already available like we do.

zeusminer-blizzard-x6-3

The Blizzard X6 cooling design is not perfect, but apparently it works pretty well delivering enough cooling performance with not so loud level of noise. We have measured the power usage of the new miner to be about 106W with the device running at 235 MHz at the wall and the level of noise from the cooling fans was at just about 45 dBA. Looking at the board with the chips we have noticed that the Blizzard X6 also uses 1.1V voltage and the maximum recommended operating frequency is 248 MHz, though you probably would want to use a lower number to get less HW errors.

zeusminer-blizzard-x6-thermal-images

Here are two thermal images showing the operating temperature of the ZeusMiner Blizzard X6 during normal operation. The temperatures of the aluminum cooler used to cool the chips is just about 36 degrees at the hottest place, in fact the highest temperature we’ve measured was at the power connector of the device. Initially we’ve powered the miner from a 4-pin molex connector, but that got the cables too hot, so we’ve changed the power source to use a 6-pin PCI-E power connector as an input. So be extra careful what source of power you are going to use as a single 4-pin molex connector might not be able to handle well the ~100W load, preferably use dual molex connectors or a PCI-E one.

zeusminer-blizzard-x6-cgminer

We have tested running the ZeusMiner Blizzard X6 at different frequencies and the one that seemed to provide the best results with our unit was 235 MHz, though you may have varying success with lower or higher frequencies, so we do recommend to try going up to about 250 MHz. At 235 MHz operating frequency the Blizzard X6 was able to provide about 3.8-3.9 MHS with about 4.5% of HW errors. We already know that the Zeus Scrypt ASIC miners do actually have higher number of HW errors compared to most other ASIC miners, however we do not like to push our hardware too much and get like 10% of HW errors – something that is easily achievable if you try to push the new X6 miners to about 250 MHz.

zeusminer-blizzard-x6-poolside-hashrate

A look at the average poolside reported hashrate from the LTC Rabbit Scrypt mining pool using the new fixed difficulty port with 1024 difficulty for Scrypt ASIC miners and the Blizzard X6 running at 235 MHz operating frequency. We’ve seen that the actual pool hashrate has varied between 3686 and 4164 MHS for a 24 hour period of time, but the average should be about the advertised 4 MHS rate.

The ZeusMiner Blizzard X6 Scrypt ASIC miner is not the best choice for investment, especially now with the current low LTC price, at least not for people interested mostly in the fast ROI. In fact the Blizzard X6 is intended for the people that are mining as a hobby or just for fun, it is also a good way to get some experience with Scrypt ASIC mining, if it is something new for you, without having to invest too much into hardware and only focus on the profit. The Blizzard X6 is also a great choice for the modding community, just like the previous version of Blizzard – doing experiments with overvolting and modifying the cooling solution. It is a fun little and affordable Scrypt miner to play with and experiment with, but not something that will get you quick return of investment or even make you profit. So think carefully what you are getting this miner for and should you really invest some cash into it or not, though the same applies for the larger ZeusMiner Scrypt ASICs as well with the current market situation.


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