The problem with a completed embedded solution is that the pool management portion sucks (based on reading about asicminer blades). They dont support stratum, and lack rich pool management features that cgminer offers, like switching pools using API, having more than 2 failovers, and so on..
The firmware already supports stratum and 4 different pools with automatic switching if a pool is non-responsive. The only limitation is the 4KB memory set aside for the coinbase data, which may be too small in some cases. Awesome. I guess im stating the obvious, but have http api as well to configure pools, restart, monitor, etc. I wouldnt mind paying slightly higher for one controler per 16-chip board since its a lot more scalable/durable and each unit individually has value. |
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The LPC + Ethernet is more like $15. That's less than a single ASIC. For a complete system with fan, heatsink, maybe a case, 12V power supply, the difference in cost is hardly worth the effort of having two types of PCBs and a new interconnect.
For lots of chips, the M/H board system is a better solution. Of course, an interesting option would be to replace the Raspberry Pi with an integrated CPU/Ethernet on the M-BOARD.
The problem with a completed embedded solution is that the pool management portion sucks (based on reading about asicminer blades). They dont support stratum, and lack rich pool management features that cgminer offers, like switching pools using API, having more than 2 failovers, and so on.. In an ideal world cgminer would act as proxy ( https://bitcointalk.org/index.php?topic=251224.0 ) . Run 2 instances of each on real computers (or pi) and use these 2 proxies as pools in the embedded device. |
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For those of you looking to control a bunch of Klondikes, I went ahead and picked one of these up for testing (specifically to see if it would power the Rpi) and its worked beautifully. (8-port USB2.0 Hub - Molex powered) https://www.bitmit.net/en/item/40935-8-port-usb-2-0-panel-hub-with-molex-power-connector?ref=1836I plan on running 6 chains of 4x klondikes, one port to power the rpi, and one port for the rpi. Being able to power the hub off the PSU just keeps it all in one package. It came through customs marked as a clock. lol. That's actually pretty nice. But 8 ports is a weird number. Are all 8 actually data ports or is one a power (charging) only port? Usually they have 7 because the 4 port chip is chained, losing 1 port. Or maybe this one has 2 input USB cables? Does it have the internal type pin header for motherboards or a normal external USB A type connector? edit: actually, looking at them on ebay I see they do use an internal connector for USB, so I don't know how you are using this with a RasPi unless you have some adapter. I understand it can power the RasPi, but you won't be able to use it to extend the USB from the RasPi without some pin header to USB-A adapter. Apparently pin to USB-A is readily available. |
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Zefir Just signed and set shipping addresses on https://verify.wpengine.com/Hope im not too late to make the delivery tomorrow for batch #1 !! You are too late. The chips from batch 1 are shipped. It was plenty of time and warning about. Dammit, Zefir - missed your delivery run today :-( When will you be around a post office next? :-) AFAIK he shipped your chips to some early batch #2 customers. you need to wait for him to receive batch #2 chips from avalon. |
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Are specs available on the H-Board and how to interface with it directly? From reading the BF alpha tester thread it would seem that it uses SPI?
Thanks.
It uses SPI interface on the pi. I stumbled upon https://github.com/legkodymov/cgminer .. no idea whos behind it or if it works or not. seems to be the cgminer fork theyd bundle with the pi. see the spidev.* and bitfury related files. |
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Whats that small black box connected to the ATX connector of the PSU? Just a switch or some kind of power distributor? Got a link? |
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Just checked current hash rate ( https://blockchain.info/charts/hash-rate). Was shocked to see rise since July 11th is more than total capacity beginning of June! Jumped 110,000 GH/s, since July 11thCurrent Difficulty: 26,162,876 next difficulty(?) 41,577,173 59% rise[/color] Few of the recently made chips will have made it to assembly lines yet. May more jumps of this quantity (not percentage) are likely. Hope my October order for new ASIC can achieve ROI. May be unlikely when all manufacturers have shipped their current orders. where did you pull that number? http://bitcoindifficulty.com/ says Next difficulty (estimate): 31,387,911 Hash rate 275,719 GH/s ( https://blockchain.info/stats) was 297,621GH/s when I looked half an hour ago. Using formula ( https://en.bitcoin.it/wiki/Difficulty) D * 2**32 / 600 = H or Hash rate / 2^32 * 600 = Difficulty so 275,719GH/s / 2^32 * 600 = 38,517,000 Im quite sure it doesnt use the spot hashrate and is averaged over last 2016 blocks |
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http://bitcoin.sipa.be/Current network hashrate is estimated at 300 TH/s Each avalon chip batch is supposed to do ~3 TH/s ... Think of how many chip orders are there... Almost all of them would be mining by october.
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would it work on usb 2.0 ? If so then what would happen if...
1. The USB 2.0 port can only provide 500 mA -- Would it work in reduced capacity?
2. The USB 2.0 port can provide > 900 mA -- Would this work as expected?
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Is there a compiled bitstream compatible with ztex out there? |
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Greetings.
I have a Alienware m14x with OS Windows 8 64 bits and 2 GPU's: Nvidea GeForce as default GPU and a Intel HD Graphics 4000 GPU.
With Diablo-miner, it identifies the 2 GPU's but uses only the Nvidea GeForce GT650m (25 MH/s) (GPU Load 97%).
But with cgminer 3.3.1, it only uses the Intel HD Graphics 4000 GPU, mining @ 11.8 MH/s (the Nvidea GPU load is 0%).
Is it possible for cgminer, to use both GPU's or even only the Nvidea GPU instead of the Intel one?
Many thanks in advance.
For nvidea use CUDA miner, cgminer is only for openCL devices... CUDA miner: https://bitcointalk.org/index.php?topic=167229.0CUDA miner is only for Litecoin, not for BTC (I think). But many thanks for your kind answer. I now understand why cgminer doesn't use the Nvidea GPU. This is wrong. You can build cgminer for nvidia. The precompiled binaries are for ATI, but if you download the nvidia opencl SDK you should be able to build against it. I have done this on linux a long time ago, no idea about windows. You don't get any fan control or temperature monitoring. |
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Thats a point. Ill ask burnin if he could change this or not. On the other hand... are there reports of breaking avalon asics anywhere at all?
Yes. I can't find any exact threads, but I have read reports of chips not performing correctly in avalon-built units. Of course it depends on what the actual failure mode is, but I wouldn't count it out. paraphrasing someone : Everything that can break will eventually break... Possibility of chip breakage should be low, but in the event that it happens, you wouldnt want the board to become totally useless, waiting for repairs... |
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"api-allow" : "W:127.0.0.1, 192.168.0.142", maybe the space between the 2 ips? cgminer 3.1.1 on my desktop accepted your old config without any fuss... |
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Did anyone else notice that in the photos in the latest update, the heatsinks seem much closer to the case edges?? Smaller case? Bigger heatsinks? Different placement? *speculates*
The motherboard now sits in the back (where it's cooler) and next to the RJ45 connector I no longer see a reset hole, so they might have switched to something like a Raspberry Pi? Does not feel like a pi... they would need to either unsodder and turn the USB bracket... or use some kind of extension cable for the network port seems like a clumsy thing to do.... That is unless they made a major design change, and used SPI/GPIO to talk to the controller card... |
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Will these devices be compatible with all mining apps?
Especially Cgminer, Bfgminer and Bitminter?
Phil.
Cgminer driver is being worked on by bkkcoins. Bfgminer and Bitminter - AFAIK nobody is working on it. Im sure once the devices are out in the wild, people would adapt the driver for other mining apps. |
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what if ambient gets over 34C ? would the whole thing explode due to pressure?
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ok I got a few psu's laying around but I am unsure how to power on the power supplies without a host pc, what I'd like to do is have a nexus 7 or netbook run cgminer, how do I switch the power supply on? is there a switch I can buy for this?
http://www.techpowerup.com/articles/other/22 |
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but every time I try to run cgminer:
./cgminer -S /dev/ttyUSB0 -S /dev/ttyUSB1 -S /dev/ttyUSB2 -S /dev/ttyUSB3 -S /dev/ttyUSB4 -S /dev/ttyUSB5 -S /dev/ttyUSB6 -S /dev/ttyUSB7 -S /dev/ttyUSB8 -S /dev/ttyUSB9 --config /home/pi/cgminer-3.1.1/cgminer.conf
unrelated to your issue, but instead of those -S arguments, adding the following to the config will do the same thing, just neater... "scan-serial": [
"/dev/ttyUSB0",
"/dev/ttyUSB1",
"/dev/ttyUSB2",
"/dev/ttyUSB3",
"/dev/ttyUSB4",
"/dev/ttyUSB5",
"/dev/ttyUSB6",
"/dev/ttyUSB7",
"/dev/ttyUSB8",
"/dev/ttyUSB9"
],
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Took me from 21st of May until now, almost 8 weeks later!
Is the plumbing to each block in serial or parallel? |
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Serial # in the firmware. It would be costly to have them printed on the board but it may make sense to add a silk screen label spot for hand writing the number when flashing the PIC. Don't know if that's something vendors would want to do or not. The serial# in firmware is easily viewed on screen. I should also add it in the API stats so it can be used in automated ways.
+1 for serial number in stats. Im thinking of making a different tool to suck stats from cgminer and maintain history per device, and help identify the exact location of a particular device (which may be having errors) by comparing serial number with usb bus/port ids. |
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