Unacceptable
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August 09, 2013, 03:51:37 AM Last edit: August 09, 2013, 04:26:09 AM by Unacceptable |
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Well,my old yardsale USB hub died.So,I went to Staples & found a 7 port powered hub with 5 volt,2.6Amp A/C adpater for $42.A little pricey,but so far it works with 3 BE's,gonna try 4 in few minutes. I'll be back with more info.It seems to work...I was in a pinch ![Wink](https://bitcointalk.org/Smileys/default/wink.gif) Very similar to this,but a Staples branded one,I can't find it on thier website: http://www.staples.com/Belkin-F4U041QFCAPL-USB-Hub-7-Ports/product_IM1PL0945Edit: bad news,only good for 3 BE's.When theres 4 they kinda freak out & random ones don't hash at top speed ![Roll Eyes](https://bitcointalk.org/Smileys/default/rolleyes.gif)
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"If you run into an asshole in the morning, you ran into an asshole. If you run into assholes all day long, you are the asshole." -Raylan Givens Got GOXXED ?? https://www.youtube.com/watch?v=9KiqRpPiJAU&feature=youtu.be"An ASIC being late is perfectly normal, predictable, and legal..."Hashfast & BFL slogan ![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
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merv77
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August 09, 2013, 08:03:34 AM Last edit: August 09, 2013, 08:16:22 AM by merv77 |
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visdude
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August 09, 2013, 08:28:07 AM |
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Nemo1024 (OP)
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August 09, 2013, 08:40:27 AM Last edit: August 09, 2013, 09:09:23 AM by Nemo1024 |
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@visdude: Awesome ![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif) the ports on the USB hub above look too close together, probably only good to get 4 USB erupters going. Yes, they seem to be a bit too cose. The distance between ports should be a little wider than the width of the USB port: 12+mm This might be slightly more promising: http://www.amazon.co.uk/TeckNet%C2%AE-Power-Adapter-Cable-Chipset/dp/B00DCO9XV8/ref=pd_sim_sbs_computers_5But the spacing uncertainty is the reason why I did not add any of them to the list. Has anyone tied them? Please report. ![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
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“Dark times lie ahead of us and there will be a time when we must choose between what is easy and what is right.” “We are only as strong as we are united, as weak as we are divided.” “It is important to fight and fight again, and keep fighting, for only then can evil be kept at bay, though never quite eradicated.”
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Unacceptable
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August 09, 2013, 10:25:36 AM |
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@ visdude,you are more clever than MacGyver ![Cool](https://bitcointalk.org/Smileys/default/cool.gif) He would have made a really big messy looking contraption,that all looks like some kind of "picasso" art ![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
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"If you run into an asshole in the morning, you ran into an asshole. If you run into assholes all day long, you are the asshole." -Raylan Givens Got GOXXED ?? https://www.youtube.com/watch?v=9KiqRpPiJAU&feature=youtu.be"An ASIC being late is perfectly normal, predictable, and legal..."Hashfast & BFL slogan ![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
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dwdoc
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August 09, 2013, 11:44:49 AM |
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I know the erupters run hot but what evidence is there that fans are necessary? Has anyone lost an erupter from overheating?
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dwdoc
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August 09, 2013, 11:49:23 AM |
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Aren't they just connected to the ports of his computers?
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Nemo1024 (OP)
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August 09, 2013, 12:00:19 PM |
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I know the erupters run hot but what evidence is there that fans are necessary? Has anyone lost an erupter from overheating?
I tested with two Erupters. One runs without any air moving around it, the other lies flat on P4-grade heatsink with copper core and as much contact surface as I could get. The first one hashes at 280~310, the other one at 338, and the uncooled one gets twice as many HW errors. Switching which one gets cooled, switches performance figures as well. So yes, cooling plays some role. However, a bank of closely sitting 18 Erupters (in 3 D-Link hubs, which lie one on top of the other), which get cooled by one Acrctic Breeze fan blowing strait at them, all run at 335 and 1-7 HW errors each (after 10 hours).
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“Dark times lie ahead of us and there will be a time when we must choose between what is easy and what is right.” “We are only as strong as we are united, as weak as we are divided.” “It is important to fight and fight again, and keep fighting, for only then can evil be kept at bay, though never quite eradicated.”
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dwdoc
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August 09, 2013, 12:03:34 PM |
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Very good to know that. Thanks!
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klondike_bar
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ASIC Wannabe
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August 09, 2013, 03:40:50 PM |
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I know the erupters run hot but what evidence is there that fans are necessary? Has anyone lost an erupter from overheating?
I tested with two Erupters. One runs without any air moving around it, the other lies flat on P4-grade heatsink with copper core and as much contact surface as I could get. The first one hashes at 280~310, the other one at 338, and the uncooled one gets twice as many HW errors. Switching which one gets cooled, switches performance figures as well. So yes, cooling plays some role. However, a bank of closely sitting 18 Erupters (in 3 D-Link hubs, which lie one on top of the other), which get cooled by one Acrctic Breeze fan blowing strait at them, all run at 335 and 1-7 HW errors each (after 10 hours). I found that without any cooling, they run around 335Mhash and about 1.3-1.8% HW errors. minimal cooling or airflow improves it to about 335.5mhash and 0.9-1.3% HW errors. (i have a usb fan in the mail because i hate how hot these get in proximity to my fingers (laptop))
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SamHa1n
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August 09, 2013, 03:51:00 PM |
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pic with new 90 amp power supplies, brought price per port to less than $2 ![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2FYQDq0zP.jpg&t=665&c=8brdY-kmqgMvvQ)
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MonocleMan
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August 09, 2013, 03:59:57 PM |
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wow samha1n that is a very pretty sight. Can you tell us where you got the 90 amp psu's from?
MM
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Xian01
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Christian Antkow
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August 09, 2013, 04:45:54 PM |
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MonocleMan
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August 09, 2013, 05:57:12 PM |
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dwdoc
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August 09, 2013, 07:48:32 PM |
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Just tried one that does not work even though it says it has a 5V 2.5A AC adapter: Only was able to get one erupter hashing.
Ativa Mobil IT 7-port 2.0 usb Hub.
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Trongersoll
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August 09, 2013, 09:28:39 PM |
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How do we get this thread pinned? too many people starting new threads about HUBs. ![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
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A_Member
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August 09, 2013, 11:12:14 PM |
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I'm running hundreds of them, for weeks now, with cheapest hubs I could find on amazon, at sauna level ambient temps that make bfl devices cower in perpetual throttle down. Per port cost ~$3 per port, including the power source. 5 minutes or less of soldering per hub.
Soo, what soldering do you have to do?
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lano1106
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August 10, 2013, 03:35:32 AM |
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From your picture, I count ~150 BEs so you 've probably hit the USB 127 devices per bus limit. Care to share your experience on that?
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BTC: 1ABewnrZgCds7w9RH43NwMHX5Px6ex5uNR
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