Nemo1024 (OP)
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August 12, 2013, 07:35:10 AM Last edit: August 12, 2013, 08:09:05 AM by Nemo1024 |
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My guide is based on other people's experience. 6 was a theoretical limit, given a 3A AC adapter (as per reviews/remarked in footnote). How strong is the adapter that you recevied? What do you connect this hub to (another hub/directly to PC)?
Main table has been updated and split into 3 distinct categories.
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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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DBordello
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August 12, 2013, 12:12:13 PM |
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Thanks!
I doubt if the ones from your local store have the 3.5A PSU. For that price, I'm almost sure they come with the inferior 400mA or similar PSU as sold on the Bay. Have you verified it? If they do indeed have the 3.5A AC adapter, I sure would like to buy a bunch of them from your local store. Even with a 2.5A adapter, they'd still be dirt cheap. Where's your locality, BTW?
I only populated the front ports because I have exactly 35 miners (i.e. 7 x 5 = 35) in hand. I'll have more BEs coming in tomorrow.
I have personally confirmed that they have the 3.5A PSU (I have 4 in hand). This is from my campus electronics supply store. Are you able to fit miners in the back ports? Have you tried mining with all 7? Also, how do you have the hubs connected (daisy chain or hub-spoke)? Great setup once again. Dan
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Josue
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August 12, 2013, 12:31:05 PM |
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Another cheap Hub USB: aprox 15€ SONYTEC HUB NEXOOS 395 7 Ports (2 vertical behind) 5 V 3 Amp Test ok with 5 USB Erupters in Windows 7, Windows Xp and Debian (Cgminer (last version) and BFgminer) ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fwww.guadalsistema.com%2Fguadalcomerc%2Fcatalog%2Fimages%2Fcomponentes%2Fhub%2520switch%2F78793.jpg&t=665&c=4wKKHULyUDwEkg)
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visdude
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August 12, 2013, 04:38:43 PM |
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Thanks!
I doubt if the ones from your local store have the 3.5A PSU. For that price, I'm almost sure they come with the inferior 400mA or similar PSU as sold on the Bay. Have you verified it? If they do indeed have the 3.5A AC adapter, I sure would like to buy a bunch of them from your local store. Even with a 2.5A adapter, they'd still be dirt cheap. Where's your locality, BTW?
I only populated the front ports because I have exactly 35 miners (i.e. 7 x 5 = 35) in hand. I'll have more BEs coming in tomorrow.
I have personally confirmed that they have the 3.5A PSU (I have 4 in hand). This is from my campus electronics supply store. Are you able to fit miners in the back ports? Have you tried mining with all 7? Also, how do you have the hubs connected (daisy chain or hub-spoke)? Great setup once again. Dan I guess I misunderstood you. I thought you said you got the four hubs from MCM. In that case, I sure would like to buy some at your campus store if I get more miners in the future. Which campus is that? Perhaps you should add a link to the guide so people on here can buy them cheap. Alternatively, I already found a really dirt cheap source in China for the hubs and planning on pairing them with an 8A PSU which should give me some headroom when populating all seven ports. Like I said in my original post, I tested seven miners on the hub for a few hours and didn't experience any issues except for the fact that the wall wart got very warm though not uncomfortable to the touch.
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visdude
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August 12, 2013, 04:41:31 PM |
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Another cheap Hub USB: aprox 15€ SONYTEC HUB NEXOOS 395 7 Ports (2 vertical behind) 5 V 3 Amp Test ok with 5 USB Erupters in Windows 7, Windows Xp and Debian (Cgminer (last version) and BFgminer) ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fwww.guadalsistema.com%2Fguadalcomerc%2Fcatalog%2Fimages%2Fcomponentes%2Fhub%2520switch%2F78793.jpg&t=665&c=4wKKHULyUDwEkg) That looks like the generic Chinese/MCM hub but with a different PSU and cosmetics.
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suprabitz
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August 13, 2013, 04:58:14 AM |
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I just received a Juiced Systems USB 3.0/2.0 13 (4x3.0, 9x2.0) Your guide says it can run 6, but that is total bs! I can run 3 MAX on this thing before I start getting more hardware errors than accepts. As soon as I plug in a 4th I get nonstop errors. Here is a picture from when I woke up this morning. The BAJ is a BFL Jalapeno ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg.photobucket.com%2Falbums%2Fv239%2Fmikestrike%2Fwat_zps9a9b5f86.png&t=665&c=A9jsAMVfysO-Yg) I had 5 plugged in. After messing around for a while, I finally got it to stop showing USB AMUx READ BUFFERING XXX EXTRA BYTES and have all of them mining correctly with 1% or less error rate. I had to reduce the number connected through this hub to THREE before the errors went away! maybe something with the 2.0/3.0 mix. which side were you using 2.0 or 3.0?
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Nemo1024 (OP)
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August 13, 2013, 08:22:39 AM |
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I am taking liberty to re-post a comment by philipma1957 from the BitMinter thread.
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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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visdude
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August 13, 2013, 08:48:47 AM |
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I am taking liberty to re-post a comment by philipma1957 from the BitMinter thread. Pardon me. I'm not an electrical engineer nor an electrician but common sense tells me that if a 12V current is applied to a 5V device, such a device would fry. No?
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Nemo1024 (OP)
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August 13, 2013, 09:03:22 AM |
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Pardon me. I'm not an electrical engineer nor an electrician but common sense tells me that if a 12V current is applied to a 5V device, such a device would fry. No?
Are you referring to 12V adapters which follow USB 3.0 hubs? The USB ports themselves feed 5V with the hubs doing conversion.
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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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visdude
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August 13, 2013, 09:39:11 AM |
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Pardon me. I'm not an electrical engineer nor an electrician but common sense tells me that if a 12V current is applied to a 5V device, such a device would fry. No?
Are you referring to 12V adapters which follow USB 3.0 hubs? The USB ports themselves feed 5V with the hubs doing conversion. I didn't know USB hubs have built-in 12V to 5V converter. If so, why are most if not all of them are powered with 5V wall warts instead of 12V? I'm confused.
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Nemo1024 (OP)
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August 13, 2013, 09:41:00 AM |
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It seems only the USB 3.0 ones do as they are required to be able to supply 0.9A per port ( http://en.wikipedia.org/wiki/USB_3.0).
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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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visdude
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August 13, 2013, 09:57:28 AM |
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Oh, OK. Thanks for clarifying. I was stuck at 2.0.
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dyingdreams
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August 13, 2013, 03:17:11 PM Last edit: August 13, 2013, 03:50:44 PM by dyingdreams |
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I just received a Juiced Systems USB 3.0/2.0 13 (4x3.0, 9x2.0) Your guide says it can run 6, but that is total bs! I can run 3 MAX on this thing before I start getting more hardware errors than accepts. As soon as I plug in a 4th I get nonstop errors. Here is a picture from when I woke up this morning. The BAJ is a BFL Jalapeno ![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimg.photobucket.com%2Falbums%2Fv239%2Fmikestrike%2Fwat_zps9a9b5f86.png&t=665&c=A9jsAMVfysO-Yg) I had 5 plugged in. After messing around for a while, I finally got it to stop showing USB AMUx READ BUFFERING XXX EXTRA BYTES and have all of them mining correctly with 1% or less error rate. I had to reduce the number connected through this hub to THREE before the errors went away! I have the same exact hub and the same exact issue. The power supply specs are as advertised, and it ran 5 for a while without errors (never tried 6). After a few days I was only able to run 3, then after another day or so that changed to 2; I've been running 2 for a few days without incident. I will be returning it as soon as I receive the new hubs I ordered, but in the meantime I will experiment with 2.0/3.0 ports both on the hub as well as the host to see if it makes any difference. As of now it's been running on a netbook running xubuntu 12.04 plugged directly into a 2.0 port. Update: I tried plugging the hub into a 3.0 port on my Windows PC, and cgminer would not detect the devices at all. I also tried switching between the 2.0 and 3.0 ports on the hub and it made no difference. I opened up device manager and saw that it was constantly refreshing, with "Etron USB2 (HS) Hub" repeatedly disappearing and reappearing. I unplugged the hub and went to plug it back into my netbook when I noticed that, with the USB cable unplugged, the hub seemed to be receiving no power whatsoever; neither the LEDs on the hub nor the LEDs on the block erupters were lighting up. I tried plugging my tablet into the charging port and it didn't get any power. I then plugged the hub back into the netbook, removed the AC adapter from the hub, and it made no difference; it still ran 2 block erupters without error, which is quite surprising, especially since its a netbook. TLDR: Power supply is completely dead. As far as I can tell the hub itself is fine.
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elite.mafia
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August 13, 2013, 04:19:14 PM |
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I just received a Juiced Systems USB 3.0/2.0 13 (4x3.0, 9x2.0) Your guide says it can run 6, but that is total bs! I can run 3 MAX on this thing before I start getting more hardware errors than accepts. As soon as I plug in a 4th I get nonstop errors. Here is a picture from when I woke up this morning. The BAJ is a BFL Jalapeno http://img.photobucket.com/albums/v239/mikestrike/wat_zps9a9b5f86.pngI had 5 plugged in. After messing around for a while, I finally got it to stop showing USB AMUx READ BUFFERING XXX EXTRA BYTES and have all of them mining correctly with 1% or less error rate. I had to reduce the number connected through this hub to THREE before the errors went away! maybe something with the 2.0/3.0 mix. which side were you using 2.0 or 3.0? I only tried using the USB 2.0 ports
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galtbit
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August 13, 2013, 06:04:18 PM |
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Is there a way to measure the amount of power coming froma USB port?
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suprabitz
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August 14, 2013, 12:18:56 AM |
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wow how many devices you got to hit 39 GHs?
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xjack
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August 14, 2013, 02:07:01 AM |
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Is there a way to measure the amount of power coming froma USB port? Cut up a USB cable and put a meter on it.
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bspurloc
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August 14, 2013, 04:07:45 PM |
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no idea why people pay so much for Hubs...
I use 12 year old USB 1.1 Xircom 7 port hubs. Their supply is 5v 3.7amps. I do 6 per hub and they are stackable.
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KyrosKrane
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August 14, 2013, 04:21:22 PM |
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no idea why people pay so much for Hubs...
I use 12 year old USB 1.1 Xircom 7 port hubs. Their supply is 5v 3.7amps. I do 6 per hub and they are stackable.
Link on where to buy them, please? ![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
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dyingdreams
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August 14, 2013, 06:55:32 PM |
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wow how many devices you got to hit 39 GHs?
That's just a display error.
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