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NewbieActivity: 21Merit: 0 Re: [ANN] Introduction to DualMiner USB (could mine both BTC and LTC) January 23, 2014, 08:41:10 AM #144 Quote from: KyrosKrane on January 22, 2014, 02:49:30 PM Quote from: WhiteyZ on January 22, 2014, 01:37:28 PM Quote from: KyrosKrane on January 22, 2014, 11:57:15 AM Can these (and other, similar, dual-use devices) mine both BTC and LTC simultaneously? Or is the user (or perhaps mining software) supposed to pick one at a time to mine?



Quote from first page and from the website:



Quote Hash Rate: Dual Mode: 40KH/s LTC, 500MH/s BTC, or LTC Mode: 70KH/s LTC, BTC Off Quote from first page and from the website:



Another poster posted the theoretical stats of the chip they're using:



Quote  BTC mode up to 2.25G/s BTC Hash Rate, with 2.4W/GHash

 LTC mode up to 60K/s LTC Hash Rate

 Due-Coin mode up to 1.75G/s BTC Hash Rate + 60K/s LTC Hash Rate, or up to 2.25G/s BTC Hash

Rate + 38K LTC Hash Rate

So two things jump out at me:



First, why is there such a difference between the theoretical stats and the quoted performance, particularly on BTC? And why is the BTC-only mode eliminated?



Second, what software would be able to use this gizmo to dual-mine simultaneously? On their site, they say "Customized Windows software with GUI" but they also mention Linux; and their screenshots are of a command-line miner. Depending on how the software is implemented, it may not be able to run on unusual hardware like a Raspberry Pi or Beaglebone. Custom-developed miners are sometimes less efficient than dedicated software like cgminer or bfgminer, so we could be giving up precious hashes. Definitely need more info on this front.

Thanks, I missed that on their Web site. But on the first page of this thread, there's no performance info from the OP. I reviewed all posts by the OP, in fact, and he doesn't mention the specs in any of them.Another poster posted the theoretical stats of the chip they're using:So two things jump out at me:First, why is there such a difference between the theoretical stats and the quoted performance, particularly on BTC? And why is the BTC-only mode eliminated?Second, what software would be able to use this gizmo to dual-mine simultaneously? On their site, they say "Customized Windows software with GUI" but they also mention Linux; and their screenshots are of a command-line miner. Depending on how the software is implemented, it may not be able to run on unusual hardware like a Raspberry Pi or Beaglebone. Custom-developed miners are sometimes less efficient than dedicated software like cgminer or bfgminer, so we could be giving up precious hashes. Definitely need more info on this front.

We developed a special version cgminer for dualminer. The customization is mainly because cgminer on github doesn't support dual mine mode. The latest version of cgminer even removed scrypt support, :-(. Also we are keeping a eye on bfgminer. We may release a bfgminer for dualminer. Currently only a customized cgminer is developed. As long as we start mass shipping, we will release cgminer that works on Linux. At that time, Beaglebone or PI can be used to control/manage dualminer usb. We developed a special version cgminer for dualminer. The customization is mainly because cgminer on github doesn't support dual mine mode. The latest version of cgminer even removed scrypt support, :-(. Also we are keeping a eye on bfgminer. We may release a bfgminer for dualminer. Currently only a customized cgminer is developed. As long as we start mass shipping, we will release cgminer that works on Linux. At that time, Beaglebone or PI can be used to control/manage dualminer usb.

joeventura



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Hero MemberActivity: 854Merit: 500 Re: [ANN] Introduction to DualMiner USB (could mine both BTC and LTC) January 24, 2014, 01:31:37 PM #155 Sorry no matter how expensive your electricity is, you are paying $980 for 700Kh of LTC mining when you can get that for half the price in a GPU.



At 500 watts for a single GPU giving you 700Kh you would pay $54 a year (at $0.15 Kwh) to run it.



The breakeven on the electricity would require you to mine for 7-9 years before these devices recovered their excessive cost.



For easy math, a GPU of about 700Kh mining costs $500 (for round numbers) so for these to be competitive they have to cost $50 USD



When they hit that price (or close to it) you should buy all you can get. There is a small window then Alpha T starts selling their units.





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fsb4000



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LegendaryActivity: 1400Merit: 1000 Re: [ANN] Introduction to DualMiner USB (could mine both BTC and LTC) January 24, 2014, 02:01:32 PM #156 Quote from: joeventura on January 24, 2014, 01:31:37 PM Sorry no matter how expensive your electricity is, you are paying $980 for 700Kh of LTC mining when you can get that for half the price in a GPU.



At 500 watts for a single GPU giving you 700Kh you would pay $54 a year (at $0.15 Kwh) to run it.



The breakeven on the electricity would require you to mine for 7-9 years before these devices recovered their excessive cost.



For easy math, a GPU of about 700Kh mining costs $500 (for round numbers) so for these to be competitive they have to cost $50 USD



When they hit that price (or close to it) you should buy all you can get. There is a small window then Alpha T starts selling their units.





Just my 0.02 BTC









your math wrong.

0.5kw * 365 days *24 hours * 0.15Kwh = $657

But 7970's power consumption is 280w, not 500

So

0.28 * 365 days * 24hours * 0.15Kwh = $367,92 - electricity cost per year your math wrong.0.5kw * 365 days *24 hours * 0.15Kwh = $657But 7970's power consumption is 280w, not 500So0.28 * 365 days * 24hours * 0.15Kwh = $367,92 - electricity cost per year

joeventura



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Hero MemberActivity: 854Merit: 500 Re: [ANN] Introduction to DualMiner USB (could mine both BTC and LTC) January 24, 2014, 02:18:09 PM #157 Quote from: fsb4000 on January 24, 2014, 02:01:32 PM Quote from: joeventura on January 24, 2014, 01:31:37 PM Sorry no matter how expensive your electricity is, you are paying $980 for 700Kh of LTC mining when you can get that for half the price in a GPU.



At 500 watts for a single GPU giving you 700Kh you would pay $54 a year (at $0.15 Kwh) to run it.



The breakeven on the electricity would require you to mine for 7-9 years before these devices recovered their excessive cost.



For easy math, a GPU of about 700Kh mining costs $500 (for round numbers) so for these to be competitive they have to cost $50 USD



When they hit that price (or close to it) you should buy all you can get. There is a small window then Alpha T starts selling their units.





Just my 0.02 BTC









your math wrong.

0.5kw * 365 days *24 hours * 0.15Kwh = $657

But 7970's power consumption is 280w, not 500

So

0.28 * 365 days * 24hours * 0.15Kwh = $367,92 - electricity cost per year

your math wrong.0.5kw * 365 days *24 hours * 0.15Kwh = $657But 7970's power consumption is 280w, not 500So0.28 * 365 days * 24hours * 0.15Kwh = $367,92 - electricity cost per year





280 Watts.



Let's convert this number to kiloWatts by dividing by 1000, to get 0.28 kiloWatts.



These devices, that have been on for 24 hours, have consumed



0.28 Watts × 24 hours = 6.72 kWh (kiloWatt-hour) of energy.

Finally, since energy costs you $0.15/kiloWatt-hour, these devices have costed you:



6.72 kWh × $0.15f/kWh = $1.01 a day * 365 days = $368.65 to run a GPU for a year



Which gives you 700Kh?





Now instead you buy 10 of the USBs and run them LTC only and you have spent $980



Let's say they use 20 watts a day ($0.07 a day) or $25 a year to run



$980 + 25 = $1005 for 700Kh is total operating for a year for these.



A GPU of the 7970 type is $440 plus the $368 for electricity is $808 cost to operate for a year.





Both the GPU and the USB Dual miners require a computer so we wont add those in and we wont add in the $80 for a good USB hub to run 10 of them.



280 Watts.Let's convert this number to kiloWatts by dividing by 1000, to get 0.28 kiloWatts.These devices, that have been on for 24 hours, have consumed0.28 Watts × 24 hours = 6.72 kWh (kiloWatt-hour) of energy.Finally, since energy costs you $0.15/kiloWatt-hour, these devices have costed you:6.72 kWh × $0.15f/kWh = $1.01 a day * 365 days = $368.65 to run a GPU for a yearWhich gives you 700Kh?Now instead you buy 10 of the USBs and run them LTC only and you have spent $980Let's say they use 20 watts a day ($0.07 a day) or $25 a year to run$980 + 25 = $1005 for 700Kh is total operating for a year for these.A GPU of the 7970 type is $440 plus the $368 for electricity is $808 cost to operate for a year.Both the GPU and the USB Dual miners require a computer so we wont add those in and we wont add in the $80 for a good USB hub to run 10 of them.