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I got one of those A*******r 49 port USB hubs a few weeks ago from one of their franchisees ( or however they figure out who can sell them) and it ran good, 2 dead ports to start. Now I have 17 bad ports. anyone else having trouble with them?
The bad ports power up BE's OK, but cannot mine or load drivers. I am using windows 7 64 bit, which may have something to do with it. But they seam pretty flimsy for the price that I paid.

1. give each BE its own serial number using cp210 manufacturer software
2. unplug hub and all BE's
3. remove all unused usb devices per http://www.tech-recipes.com/rx/504/how-to-uninstall-hidden-devices-drivers-and-services/
4. plug in hub and then each BE one at a time
5. make sure you have a good power supply that has the required current capacity on the atx plug, and only install BE's up to that capacity. eg. 1200 watt silverstone would only run 46 BE's, has plenty of 12vdc juice but limited on the atx line to the two +12 feeders. When you draw a lot of current I think it drops the hub voltage below that required to operate the BE's.
6 Check your fuse to ensure it isn't heating up indicating it is dropping some voltage. External cooling, fans essential when running that many BE's in close proximity.

what is the cp210 manufacturer software? I have the vcp driver package is it in there?
I have found that the 'bad' BE's show up as silicon labs cp2102 UART Bridge controller in my devices.

just load up linux, otherwise you have real trouble telling the windows software issues apart from possible hardware issues.

+1 I was running two different brands of 49 port hub.  Once I put them on Linux all the problems went away.

What plugs from the atx connection does the hub use?

Just the 5v and common (red and black) wires?

I got a 5v 40 amp supply, trying to figure out how i connect it.

How much did it cost and where did you get it?

Did you confirm the ports are bad? It could be your machine or OS. I found with my Dell XPS 17 3D laptop running Windows 7 x64 that it didn't like me connecting my 6 10 port (6 USB keys a piece) hubs into it, no matter if I used the USB 2 or 3 port. It wasn't until I switched computer; I have an old Lenovo ThinkPad X61 with Windows 8.1 installed that all the ports worked.

Mine are CP210x in w7 msdn. What/Where is this bios software to use to set serial numbers on BE asics at for windows ? or Linux only ?

The hubs are on Bay now, 200usd buy it now paypal. free ship US.

freddy

Those hubs are made vary cheaply with low quality components. They where never designed for the USB miners specifically.     

The 49port ones on bay are made by ASICMINER for USB Block erupters... Same company made the original 333-336 usb miners. Orange/Blue hub jobbers. The Original 49er was a different company and very expensive made for charging stations and is grey in color.

But what I need is a link to the software to change the serial numbers so they can be indivudualy chosen other than by com port number.

hahaha, went away for the weekend before I posted this.....

Tried to reseat the fuse and power connectors on the hub and found the 40A fuse all melted and burned up. Apparently, there was a power outage while we were away.


To this unit's credit, I scrapped a bunch of charred plastic out of the fuse housing, replaced the fuse and it is now hashing away again with a new, beefier PSU (36A +5V rail) the unit I bought was the ASICMINER hub. I was surprised it still worked after seeing all the melted plastic from the fuse. Fuse did not trip, it just melted all over.

I need the software as well. Win7 64 bit. I was able to remove all the com ports with the link provided, show hidden devices trick.- Thanks wpt1wpt1 !

So, given my recent power surge/ strange melted fuse issue, who wants to speculate on this:

We had an ice storm that caused power outage. I was away, returned home to find all PC's off. Rebooted and started seeing the strange issues with my hub miners. Found the melted fuse, not blown. Cleaned it up, replaced fuse and also replaced the PSU to the hub. I also found some brown discoloration on 4 of the hub's ATX power connect pins. (assume the 5v rail and ground pins)

Previous PSU was nearly new Hiper PSU 36a +5v rail(I posted about this one before, had wrong mobo power connect for a build I had planned way back when, and was sitting in my closet new, unused).

Given the above, did the fuse just melt over time, or did the power outage blow the whole works?

The big question is this: Should I lower the amperage on the fuse in the hub? would that provide better protection? say 30a or 35a? A 25a fuse would be too small I think, just barely enough for 50 miners with no wiggle room. 30a would do up to 60 miners, so the 49 max  miners on the hub would be well protected.

You had a 40amp fuse on a 30a circuit. Why it did not blow, and burnt wires/holder.

You would need 50a P/S to run that 40a fuse with room to blow on sudden surge.

At 40a fuse with a 30-35a P/S you get burn rather than blow...

48 asics @.6A would be spec with some room on top, some of the newer asics pull more much more for some, way out of USB spec. That is what that hub is for, setup right it will work properly.

So your P/S says 35a 5v get real give it some breathing room load it no higher than 30a 5v.
Safe for up to 30 35 miners before you are pushing things. I would use 25a fuse till it blows to see where your load is really at, could be a bad miner or ?

this is correct.  use a 25 amp or 30 amp fuse  with 40 sticks tops = no worries

thanks all. I want to utilize all 49 ports, the new PSU is an Orion , came out of old tower server. 550W PSU with 36a +5v rail(same specs as the Hiper I blew up). assuming .6a X 49 asicminer sticks, we get 29.4a. throw 35a fuse in and I am good?

currently have 20 sticks on 15a fuse, running fine.

Just so everybody gets the point, under spec the fuse, when it blows you will know where you are at with current flow.

In a scenerio, 15a fuse should blow at 25 - 30 miners somewhere in that range.

If your P/S is 36 amp load it no higher than 30 amp... get it ?
They need room to breathe, 36A is the Max SURGE not 24/7 load spec.

thank you

Here (https://bitcointalk.org/index.php?topic=270367.0) you go. :)

My point was It's a cheap OEM 49 port USB hub that was just branded with block eruptor logos.  We are looking to do something better though  ;)
my only question is are people still into USB stick mining that much.

200 is not cheap :) I can afford 2 USB asics a month at my budget, I have three @40 buck a piece and going down.

The hub works well if not missused by not knowing its limits.

Great Thanks for the Link ! Here comes a small army of AMxxxx Miners.
With this I believe even XP can partake, since it cannot auto virtualize ports like W7.

freddy

thanks for the CP210 manufacturing link Dunkelheit667 !