Morblias (OP)
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October 02, 2012, 03:18:24 PM |
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In preparation for ASICs, what USB hubs do you have/are going to buy? I am currently leaning towards http://www.manhattan-products.com/en-US/products/9583-mondohubThe ports are only 500mA, but I am assuming BFL Jalapenos will have something like dual usb inputs.
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squall1066
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October 02, 2012, 03:37:21 PM |
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Wow 28 ports!! someone has a lot of pre-orders! I will just be getting a 10 port powered USB hub
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kjlimo
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October 02, 2012, 04:52:26 PM |
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I think you might run into logistical issues of keeping all the units & power cords that close together even if you have 28 units.
I bought a $7 cheap 10 port powered USB and I'm regretting it. It stops working and loses connection about 1-3 hours after starting...
So I'm looking to spend more like $30 for a decent one.
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Desolator
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October 02, 2012, 05:34:48 PM |
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The problem with USB hubs is there aren't any "good" ones. There are only okay ones. Newegg has 254 of them and none have significant numbers of high ratings. If you want one that probably won't fail too soon, I'd go with basically anything without horrific ratings from: Inland Bytec SIIG Koutech Belkin Hawking US Robotics Kensington TrendNet Sabrent A lot of those companies make some pretty bad ones but they also carry a couple that are pretty nice. Ultra "makes" really bad products but their hubs I've had a lot of luck with too. (they don't make anything, they buy OEM and put their name on it). if I had to buy one right this second, I'd say none of the above and get this beast: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4621333&CatId=392not a bad price either
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Mobius
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October 02, 2012, 07:20:43 PM Last edit: October 02, 2012, 07:38:06 PM by Mobius |
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You need to determine if redundancy is important, 1 large hub = single point of failure, Multiple smaller hubs will spread out the risk and allow some margin of safety. One fails and you can plug into the others. Also make the determination if you will need USB 3.0 ports before buying.
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freeAgent
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October 02, 2012, 07:45:19 PM |
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Instead of buying a ton of Jalapenos, why not buy Singles? They presumably won't get their power from the USB anyway, so pretty much any hub should work. You may also want to check out which hubs people are using for Raspberry Pi devices. The Raspberry Pi is extremely picky when it comes to USB, so anything that works with it is pretty well designed. You'd want to go with the ones with the highest power ratings: http://elinux.org/RPi_VerifiedPeripherals#Working_USB_HubsI use this one, but it sounds like you want more ports. It's got a pretty good port:power ratio though (2.6 Amps and only 4 ports). It should be good to power two Jalapenos: http://www.amazon.com/Belkin-Ultra-Slim-Series-4-Port-F4U040v/dp/B005A0B3FG/Assuming the Jalapeno power requirements are accurate and it operates on 5v, you'll need the following formula for amp output in any USB hub: .9 * (number of Jalapenos) = Amperage output of USB hub. That Mondohub linked to in the OP outputs 4A (or 20 watts), so you'd only be able to run 4 Jalapenos on it, wasting 16 ports. That also assumes the Jalapeno powers itself with two USB plugs.
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Morblias (OP)
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October 02, 2012, 07:49:16 PM |
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Assuming the Jalapeno power requirements are accurate and it operates on 5v, you'll need the following formula for amp output in any USB hub: .9 * (number of Jalapenos) = Amperage output of USB hub. That Mondohub linked to in the OP outputs 4A (or 20 watts), so you'd only be able to run 4 Jalapenos on it, wasting 16 ports. That also assumes the Jalapeno powers itself with two USB plugs.
Wow I did not know this, I am an idiot when it comes to electrical stuff. I just plug it in and hope I don't start a fire. I did one of my single trade-ins for 8 Jalapenos just for the hell of it, so I will need a lot of usb ports for those plus the SCs and bASICs I ordered.
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freeAgent
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October 02, 2012, 07:58:30 PM |
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Assuming the Jalapeno power requirements are accurate and it operates on 5v, you'll need the following formula for amp output in any USB hub: .9 * (number of Jalapenos) = Amperage output of USB hub. That Mondohub linked to in the OP outputs 4A (or 20 watts), so you'd only be able to run 4 Jalapenos on it, wasting 16 ports. That also assumes the Jalapeno powers itself with two USB plugs.
Wow I did not know this, I am an idiot when it comes to electrical stuff. I just plug it in and hope I don't start a fire. I did one of my single trade-ins for 8 Jalapenos just for the hell of it, so I will need a lot of usb ports for those plus the SCs and bASICs I ordered. Yeah, given the prices, you'd be better off getting 4 of the Belkin USB hubs I linked to and using those. They're $20 each and power 2 Jalapenos vs $60 each for 4 Jalapenos. I hope you've got 4 open USB ports on your computer (or multiple computers)
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October 02, 2012, 08:27:03 PM |
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I asked this in this thread : https://bitcointalk.org/index.php?topic=114428.0And at BFL forum I posted some findings: Heres a site with a great deal,never bought from them before,so use at your own risk.I will 13 port,5 volt-4 amp $35 http://www.synchrotech.com/product-u...b_13-port.html Another 4 amp w/4 ports model $42.99 http://www.synchrotech.com/product-u...d-4-HU430.html Each Jalapeno is 900ma,so 4 Jallies per hub,with 300ma left over. But.....the ports I think only support 500ma each,so you'll need the dual USB cable too for each Jally http://www.newegg.com/Product/Produc...82E16812270226 https://forums.butterflylabs.com/showthread.php/13-Lots-of-Jalapenos-on-one-PCI'm still unsure,is USB 2.0 500ma & USB 3.0 1000ma?? Or do some 2.0 handle 1000ma??
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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
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freeAgent
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October 02, 2012, 08:43:57 PM |
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No standard USB 2 port coming from a computer supports 1A. There may be special ports or features on some motherboards that support 1A for quickly charging devices, but I wouldn't count on it.
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dankroxel
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October 02, 2012, 09:59:20 PM |
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October 03, 2012, 12:35:46 AM |
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Good find Heres the full specs: Model No.:RHB-500 Color:Black Type:USB Standards:USB 2.0/1.1 Ports :1 x Upstream, 10 x Downstream Transfer Rate :1.5/12/480Mbps Power Input :Self-power mode / BUS-power mode Power adapter: DC 5V 4A Hub Dimension:155 x 69 x 28 mm / 6.1" x 2.7" x 1.1" (not including power adapter) Weight:Unit Weight (not including adapter): 145g / 0.32 Lbs Power Adapter: 195g / 0.43 Lbs Warranty:1 Year http://www.rosewill.com/products/1543/ProductDetail_Specifications.htm
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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
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mtbitcoin
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Etherscan.io
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October 03, 2012, 07:19:34 AM |
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A lot of newer boards come with high powered usb devices that are designed to support charging from a USB port and these should be sufficient for running the Jallies. In addition a lot of board manufacturers such as gigabbyte, msi, etc also have released software for high charging. The only exception I see is if you intend to run a large amount of the Jallies on a single machine, but if that was the case then getting a single would probably be a better idea
Cheers
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Berni
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October 03, 2012, 08:37:58 AM |
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I bought Exsys 1177, the Usb Hub has 7 Ports and a 4A Power Supply. I will install the Hub inside a 4HE 19", and the Hub has Support for power Supply by floppy connector, so no Adapter is neccessaryto use the ATX power Supply.
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Desolator
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October 03, 2012, 01:14:42 PM |
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No standard USB 2 port coming from a computer supports 1A. There may be special ports or features on some motherboards that support 1A for quickly charging devices, but I wouldn't count on it.
+1 and also most pairs of USB ports right next to each other on the front of the case or inline USB ports on the motherboard itself share an electrical circuit so they're 0.5A total between them, each being able to pull the entire 0.5 though. So if Jalapenos need 1A via USB, A LOT of people are going to find that their system won't run them.
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Morblias (OP)
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October 03, 2012, 06:54:28 PM |
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Tips / Donations accepted: 1Morb18DsDHNEv6TeQXBdba872ZSpiK9fY
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Unacceptable
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October 03, 2012, 08:38:36 PM |
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I emailed Gigabyte about my mobo: Do the USB ports (either 2.0 or 3.0) allow 500 milliamp or 1000 milliamp as a max current draw? If yes, which ones ? My motherboard model: GA-990FXA-UD3(rev. 1.0) I'll be using them for several Bitcoin mining devices consuming 4.5 watts (900 milliamp each).
From Gigabyte: Dear Customer, All are the same and they can accept up to 1A *Whether to support 3X USB power design, it may vary by models* We are unable to verify your device as only iphone, ipad been verified for charging. WooHoo!!!!!!!!!!!!!!!!!! I still may get the dual USB cables,just to be sure I don't fry my mobo.
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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
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Desolator
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October 04, 2012, 01:16:04 AM |
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btw almost any Asus or MSI motherboard made recently has a phone charging smart 3x power feature and every one I've ever seen recently supports 1 amp power. I guarantee no laptop on the planet under $800 does though.
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abbeytim
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October 04, 2012, 07:03:28 AM |
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well the small asics like the bfl jalepeno are usb powered
the bfl single sc and the bASIC have there own barrel connector for power
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