USB hubs for ASICs - page 3. | Bitcointalksearch.org

ralree

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Activity: 518

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Manateeeeeeees

Quote from: Unacceptable on October 11, 2012, 04:20:52 AM

Quote from: ralree on October 10, 2012, 02:37:26 PM

http://www.ebay.com/itm/Black-7-Port-USB-2-0-High-Speed-HUB-ON-OFF-Sharing-Switch-For-Laptop-PC-/110954699994?ssPageName=ADME:X:AAQ:US:1123

$5
Free shipping (from China, but I don't need it for a month at least)
Cool blue lights
7 ports.

How can you go wrong? I got 2.

Its cool,but thats not a powered hub,it won't work for the Jalapeno's,only for the SC Singles 30 or 60 gh models.

It is a powered hub - says right in the description. You need to put a 5v power supply into it, and I don't think one is included. I'm doing SCs and bASICs, so it won't matter.

MoonShadow

legendary

Activity: 1708

Merit: 1010

Quote from: bitpop on October 10, 2012, 11:25:40 PM

And you don't think daisychained firewire gets "overwhelmed"?

Sure, it can. My point is that USB is great for many things; such as thumbdrives, keyboards & mice. But streaming across a USB bus (particularly across a hub) is a hell of a bottleneck. Firewire was literally designed for streaming of data. Again, don't limit yourselves simply to the interfaces that you are used to. USB would be fine for a single unit, but not for a large number of them. They will each need their own stream from the host, and the overhead for streaming on USB is huge. Each unit will be competing with all others for access. This would also be true for firewire after a point, of course; but overhead for setting up and maintaining a dedicated data stream on firewire is much lower than USB. USB's greatest advantage is that it's everywhere; and it's everywhere because it was the first market ready hot-pluggable serial bus standard. USB is VHS, Firewire is BetaMax.

MoonShadow

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Quote from: Morblias on October 11, 2012, 08:29:56 AM

Quote from: ralree on October 11, 2012, 12:17:16 AM

I've gotten LOTS of cheap electronics from China, and I've never had a problem. It's not that hard to implement USB (all of the USB you're using right now was almost certainly made in China). I'll be very surprised if these hubs don't work. If they don't, $10 loss. No biggie Wink

.

What did you get that didn't work?

My biggest complaint was the cctv security camera I bought from China. It took FOREVER to figure out how to work it due to the software not working on Windows 7. Seems like every software of things sold on ebay from China only support windows xp. Then finding drivers for it to work took hours of looking and managed to download 2 viruses along the way (thank god it was in a virtual machine). I guess you should be fine though since USB doesn't require trying to find software haha.

I once bought a cheap off-brand MP3 player off ebay that was shipped directly from China. It never worked, and I think it might have simply been a theatre prop.

Desolator

sr. member

Activity: 392

Merit: 250

If you want to see one that doesn't work and what it did to not work, just hop over to newegg and sort by "best rating" then go to one of the last pages. You'll find epic equipment like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817175014&SortField=0&SummaryType=0&PageSize=10&SelectedRating=-1&VideoOnlyMark=False&IsFeedbackTab=true#scrollFullInfo

read some of the reviews for mega lolz.

squeept

full member

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Kind of on topic: I think I'm going to buy a Jalapeno just to mod it to fit in a 5.25 bay for the novelty of it.

Morblias

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Activity: 576

Merit: 500

Quote from: ralree on October 11, 2012, 12:17:16 AM

I've gotten LOTS of cheap electronics from China, and I've never had a problem. It's not that hard to implement USB (all of the USB you're using right now was almost certainly made in China). I'll be very surprised if these hubs don't work. If they don't, $10 loss. No biggie Wink

.

What did you get that didn't work?

My biggest complaint was the cctv security camera I bought from China. It took FOREVER to figure out how to work it due to the software not working on Windows 7. Seems like every software of things sold on ebay from China only support windows xp. Then finding drivers for it to work took hours of looking and managed to download 2 viruses along the way (thank god it was in a virtual machine). I guess you should be fine though since USB doesn't require trying to find software haha.

Unacceptable

legendary

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Quote from: ralree on October 10, 2012, 02:37:26 PM

http://www.ebay.com/itm/Black-7-Port-USB-2-0-High-Speed-HUB-ON-OFF-Sharing-Switch-For-Laptop-PC-/110954699994?ssPageName=ADME:X:AAQ:US:1123

$5
Free shipping (from China, but I don't need it for a month at least)
Cool blue lights
7 ports.

How can you go wrong? I got 2.

Its cool,but thats not a powered hub,it won't work for the Jalapeno's,only for the SC Singles 30 or 60 gh models.

Xfinity

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Activity: 127

Merit: 100

Quote from: ralree on October 11, 2012, 12:17:16 AM

What did you get that didn't work?

I am curious as well.

On topic:

I like to buy USB hubs that have proved themselves by reading user reviews.

ralree

hero member

Activity: 518

Merit: 500

Manateeeeeeees

Quote from: Morblias on October 10, 2012, 03:06:15 PM

Quote from: ralree on October 10, 2012, 02:37:26 PM

http://www.ebay.com/itm/Black-7-Port-USB-2-0-High-Speed-HUB-ON-OFF-Sharing-Switch-For-Laptop-PC-/110954699994?ssPageName=ADME:X:AAQ:US:1123

$5
Free shipping (from China, but I don't need it for a month at least)
Cool blue lights
7 ports.

How can you go wrong? I got 2.

You will soon find out why I stopped buying cheap electronics from China. Good luck Grin

I've gotten LOTS of cheap electronics from China, and I've never had a problem. It's not that hard to implement USB (all of the USB you're using right now was almost certainly made in China). I'll be very surprised if these hubs don't work. If they don't, $10 loss. No biggie Wink

.

What did you get that didn't work?

bitpop

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And you don't think daisychained firewire gets "overwhelmed"?

MoonShadow

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Activity: 1708

Merit: 1010

Quote from: bitpop on October 10, 2012, 06:54:05 PM

And how do you explain firewires incapability to hub?

Firewire is a daisy chain serial bus, it doesn't need to hub. The second unit plugs into the second firewire port on the first unit. Also, firewire uses a much higher power bus voltage, of 16 volts nominal. It could handle a small asic on it's own without powered hubs. Furthermore, you can now get firewire switched hubs, so that complaint is moot.

Mobius

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Quote from: jjshabadoo on October 10, 2012, 07:11:23 PM

What about just to communicate with devices and not for power purposes?

Do people think a decent laptop with a quad CPU can handle like 25 of the 54 or 60 GH units ?

Can you plug in like 2-3 hubs to one laptop ?

With cgminer yes

bitpop

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Of course

jjshabadoo

hero member

Activity: 535

Merit: 500

What about just to communicate with devices and not for power purposes?

Do people think a decent laptop with a quad CPU can handle like 25 of the 54 or 60 GH units ?

Can you plug in like 2-3 hubs to one laptop ?

Unacceptable

legendary

Activity: 2212

Merit: 1001

I have several of these Belkin hubs,they are powered up to 2.5 amps @ 5 volts.

Belkin F5U101,4 ports,5 volt @ 2.5 amps.

So in theory I could run at least 2 Jalapeno's on each hub.

But yeah,USB supplying that much power for a device is not a good decision.I would prefer a wallwort myself or get some cables from Cablez Cool

I shouldn't be needing them,I'm going to upgrade my order to a 30gh unit instead.Maybe I'll get a Jalapeno or two later just for the novelty Wink

bitpop

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Merit: 1060

And how do you explain firewires incapability to hub?

MoonShadow

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Activity: 1708

Merit: 1010

I don't understand this attraction to usb, at least not for more than a single unit. If one intends to accumulate a number of these stand alone hashing devices, there are much better interfaces to use. Firewire comes to mind immediately. And before anyone complains about not having firewire on their PC, if you can invest gobs of money into a growing ASIC farm, you can buy a $40 firewire card off Ebay.

USB has it's place, certainly. But I would think that it wouldn't take very many of these devices to overwelm even a 480 Mb/s serial bus, considering the relatively high overhead penalty that a spider's web of powered hubs is going to introduce into such a plan.

bitpop

legendary

Activity: 2912

Merit: 1060

Dont ever use a usb 3 for usb 2 devices. usb 3 still has issues due to cheap chipsets.

Morblias

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Activity: 576

Merit: 500

Quote from: ralree on October 10, 2012, 02:37:26 PM

http://www.ebay.com/itm/Black-7-Port-USB-2-0-High-Speed-HUB-ON-OFF-Sharing-Switch-For-Laptop-PC-/110954699994?ssPageName=ADME:X:AAQ:US:1123

$5
Free shipping (from China, but I don't need it for a month at least)
Cool blue lights
7 ports.

How can you go wrong? I got 2.

You will soon find out why I stopped buying cheap electronics from China. Good luck Grin

Global BTC

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Activity: 529

Merit: 500

I have a ten different models of USB hubs for sale on Bitmit. Here are some of them:

Topic: USB hubs for ASICs - page 3. (Read 16461 times)