Topic: [IN-STOCK, SHIPPING, OPEN] Professional quality USB hubs for USB bitcoin miners - page 3. (Read 9883 times)

Don't get me wrong…
It is possible to get a 49 port 'hub tree' or even greater…. but not like that.

I have a very nice design for a 20,40,60,80 but the problem is the cost,  to get decent manufacturing prices I would have to run 500-1,000 pcs
(yep I could EASILY manufacture myself… but end up contaminating my residence with Lead/antinomy/mercury compounds)(queue red neck with toaster oven)

Just how many customers would I have…?
No one in their right mind is going to be using USB sticks for that sort of mine setup, which would basically leave setups for manufacturing.

Yesterday I was watching CCTVn ,
which is like a China undercover reporting… Shock HORROR… they found government approved Plastic water pipe manufacturers using Medical waste and contaminated plastics for municipal water supply pipe…
Y…A….W….N…  they do EXACTLY the same with all the food products they manufacture for the Export market… toasters,water kettles, clip together food containers (which incidentally is WHY I NEVER buy such products.. all my shit is glass or stainless)

Unfortunately what most people what these days is the cheapest shit possible, even if they have to buy and replace it 10 times….

If there is such a curse as reincarnation, I want to come back as the dumbest banjo strumming MOFO on the planet, because Ignorance truly is bliss.

Lots of great info.
I was leery of the 49 ports hubs.  They looked great but other than the 333mh/s sticks I rarely saw them full with other types of USB ASIC's.

Yep that bitch is 20A clear……. and that's the constant current it can provide at 5v1
There is even room to slap in different PSU, but there is no need…

And yep I know they are not cheap…. if I could find a way to sell this stuff at $50USD there would be a massive market, that said , how many USB 2.0 hubs have we bought over the years… I have a massive box of them I use for spares….

I have a couple of other USB hub products in Metal cases I evaluated, but they fall down on the PSU, and by the time I costed a new case and integral PSU … they come out at about the same cost.


Since the Fury chips are highly dependent on the onboard regulators, the closer you can get to 5.X at the socket, the cleaner the regulation at the chip…

Once the supply at the socket comes down to 4.7-4.8 then the regulation goes on the buck convertor feeding the  Fury.

Seriously….. next time they used a buck convertor, they should have targeted one that could go as low 3-4v for it's supply rail…, very few devices give 5v at the USB socket…

This is why the 49 port hubs are dodgy…. you have the potential for 40-50A of current slopping around the tracks, ping ponging about at  MH bit rates…..
god only knows what all that inductance looks like on a double sided pcb…..
Plus the other issue is the 'sense wire' is too far away from the farthest USB connector when using the ATX PSU @5v

Weeeeeeeeee……

i have lots of sticks, hubs, psu's gpu's ,but no big miners.  I had 4 cubes for about a week .  but I had a buyer for them when I got them.

I got into mining due to my ebay mac mini/pc upgrades.  i figured it would be a good fit .  has been nice so far.
I learned years ago that big ticket sales on ebay are very hard to do. so in mining I do smaller priced items . even if 1 out of 10 buyers on ebay robs me it is only for 1 or 2 usb sticks.

 I would have a hard time if a buyer robbed me of a knc jupiter .  I would most likely want revenge which leads to bad karma.  now if a buyer robs a usb stick or 2 I live with it. put them on a do not sell to list and move on.


These are the best hubs I have owned or tested as of today

 not the cheapest but the sturdiest so far. they seem to have the best power supply so far.

Wow! philip, you must have a huge collection of everything that's available in the mining world!

That is just great. 
Once I get this I can sell my Anker 7 port hubs then.

I took  more photos.  I set all at the stock

freq 50  and it  pulls 44-45 watts.



 Set at a good over clock freq 54  and it pulls pulls 56 watts.

The hashrate jumps from 2.0 to 2.5 so 16 sticks go from 32gh to 40gh pulling only 56 watts at the plug pretty good. means it can pay for power at very high difficulty rate.



I did 16 at freq 54 on this hub



This hub does  only  7 of 10



I had as many as 18 on the stud hub running at 54  freq

Nice deal. 
What speed are they running at? Are any overclocked?

In some good news my RedFury just got out of customs as well today.  I should have it to add to the others by saturday. Hopefully my hub does not have to wait so long as well.

quick photos

Wow that is a beast.
Is that on US 110v?
Now I am even more anticipating mine.

  real quick post it is running 18 ice 'nano' furies   set on 55 for oc. 


 no other hub that I have tested allows for setting 55 most 10 port hubs allow 6 or 7 nano furies set on 54.     

 it is good enough that I will order some more. 

 I need to fully test it and also get some more hubs attached to it.

Congrats on escaping the clutches of customs. 
I can't wait to see your posts about how it works when you are setup to go along with others posts on theirs.

The hub is 19 external USB ports , 3 are level 1, 16 are level 2… that is all we need to care about… for expansion hubs plug the shit into the side.


This is something I have been  HARPING on for over a YEAR on the forums and WHY the Pi is NFG for large installations.

Most of these shitty little 'cutter' SBC's have major problems with the USB… then add into this equation SHITTY hubs.

Nearly everyone knows about the 126 USB device limit per Physical controller, but what is not often discussed it the level limitation.
'Theoretically' a usb chain can be nested to upto 5 levels.

 I.E

Controller+Hub+hub+hub+hub.
Now here is the rub… inside the silicon of the SBC or sometimes on the PCB is a hub chip (NOT for users)…, because these SBC devices CHAIN the  ethernet/bluetooth or other I/O internally off the USB protocol, just the manufacturers don't tell you directly….

So what they do is 'hide' as many as TWO logical USB hubs INSIDE the SBC (Huba Huba), BUT then Chain them off each other and into a SINGLE silicon port……,
The reason why they hide two, is because as soon a you plug a slow device into a chain then the WHOLE chain is that speed(new smarter hub chips can act as translators without destroying the speed of the whole chain as long as there is a clear path at 480Mb/s).

The net effect of this SBC hand job is that straightway the 5 levels become 3 or less!!!, which is basically enough for 1 extra 10 port hub (because 1 chip HAS to be chained off another one and hence the problems with the PI, if you are lucky you plug the other hubs into the  FIRST chip in the chain then you get a second level, if not they get plugged into the second chip and go out of range)

Coming back to the metal hub:
if you use the 3 side connectors, then it is one level ,
if you use the top, then it is basically 2 levels apart from 2 top ports where it is 1.(work it out!! )

So… if you buy 4 metal hubs

you plug your computer into one of the hubs via the 'B' type connector and then you plug the other THREE hubs into the side connectors of that ONE hub, UNLESS your computer has more than 1 port, in which case you use ALL the connectors on the computer first.

DO NOT build up a single chain of 1:1:1:1 and think it is cooler and faster, because it is not.
USB is a TREE structure and no tree has all the branches on a single limb (consider the controller as the TRUNK, notice how mother nature has ALL this 'effective distribution' shit already worked out!!!).


These metal hubs I PERSONALLY have had a full device chain of nearly 126 devices, the miner count reached ~104 devices, the rest was hub chips………
But NOTE, the miner performance is less with an SBC than a 'real computer', I suspect it is due to kernel task switching.


Next up……..
Realtek, yep you see they make all sorts of USB silicon…. In fact they developed a shit load of silicon when USB 1.0 came out, and since silicon development is expensive, when USB 2.0 came out they took a silicon 'wrapper' that runs USB2.0, but then the internal cores of their chips are USB 1.0…., their chips are mostly used in cheap crap hubs from China.

BUT they all advertise the products as USB 2.0 compatible with 1.0, because the silicon wrapper is good to USB2.0 standard (which Is compatible with 1.0) ,but the actual internal core silicon communicates at 12mb/s or SLOWER!!!.
Same with their Ethernet to USB chips, the whole core runs at USB1.0, which is ironic because the Ethernet is '100/10 compatible' but it is bottlenecked because it is running at USB1.0 speeds internally!!!!
(bit like some old lady driving her battery powered trike in a 45MPH zone, because it is 'road worthy' but holding up all the traffic behind her)

Needless to say Microsoft was involved in this…..

Thanks payment received. I am getting your shipment ready this evening, will post it first thing tomorrow morning

I hope it gets sorted down there soon.  I just ordered one of these myself and I am looking forward to it.

yeah not the first time I have had delays with NYC customs.

Excellent.
Thanks for all the info and help.

This is a SOLID STEEL construction, cam shell,
 Internally the  USB PCB is mounted on a steel back plane,via steel/brass bushings spaced so they take the force from any USB items being plugged in.
This backplane is then screwed into outer case, the Switched mode PSU is mounted under that, again bolted to the outer case.

More importantly the parts are replaceable, I.E you can swap out the power supply or even the USB PCB, so if you blow the ass out of the power supply (lightning strike?), you can just swap it out.

Also the USB tree is structured in such a way as to MINIMIZE the number of levels… (127 is NOT the ONLY limitation per USB HOST controller)

Many people think that building a usb hub is 'easy' you just get a PCB and some USB chips and stick them together…..

Yep that works fine for basic setups 1 computer 1 hub… but the real design thought comes in when…… you take two identical hubs and chain them together…..
Badly designed and you can end up with 'mis nested' hubs. (signals travel ~ 3 inches per ns unless it is silicon then it is WAY slower…)
There is a REASON this hub has the 3 side ports……, they are not just basic USB ports.

RF