Topic: [CLOSED] BTC Guild - Pays TxFees+NMC, Stratum, VarDiff, Private Servers - page 281. (Read 903150 times)

I'd love to get my hands on one of these:

http://usb.brando.com/usb-20-port-hub_p03123c039d015.html

but at the moment i have more ports than miners.

After a few people having the same issues in IRC, here's a quick guide on some common issues:


1) Extremely high HW Error rate with virtually no hash rate.  This is almost always due to power issues.  The chip is not receiving full power from your hub/port most likely.  If you're running many chips, unplug them all, plug them in one at a time, run it for a few minutes, and confirm that it's getting shares.  All ASICs will have HW Errors to some degree, but anything over 1-2% after 10 minutes is where there may be something very wrong.

2) Chips not showing up in bfgminer/cgminer.  This is the same as #1.  Cheap powered hubs will not be providing enough power to each port, and as a result the chips won't be acknowledged by bfgminer/cgminer.



USB Hubs:

There are virtually no hubs out there under $50 that will power more than 4 or 5 Block Erupters at once.  If you are determined to buy cheaper hubs, you will need to plan on running only 4 per hub.  The only hubs I have confirmed as being safe to run more than 4 miners are:

Rosewill 10-port hubs:  These are 4A @ 5v.  This means it is safe to run 7 Block Erupters.  You do not want to push the hub to the max power supply rating!
Anker 10-port hubs:  These run 4A @ 12v.  This means it is safe to run a full 10 Block Erupters without worry.


On any other hub:  Look at the power rating.  Factor in 0.6A per Block Erupter to give it safety.  Running a low grade PSU at it's max rating could eventually result in damaging any or all chips plugged into the hub, and undesirable performance even if it does not actually damage the chips.

Thanks eleuthria, got my order of 22 USB block eruptor things today.  Using 3 10 port anker hubs, and 3 usb powered cooling fans, I now have a little over 7ghz mining on a tiny shelf, while hopefully drawing less than 50W (estimate, misplaced my kill-a-watt meter blah).

also, i know that my netbook, even though it has 3 ports, can only handle 2 without a powered HUB. That is running plugged into the wall. I suspect some laptops may have the same issue.

Linux guide was added at the bottom of http://www.btcguild.com/index.php?page=support§ion=blockerupter .

Just a note:  Lots of people are getting chips and plugging them in.  Please be very careful with underpowered/generic brand hubs!  Very few hubs can actually power every port at max draw.  Most of the cheaper ones can only power half of their ports when pulling full power.  Running the chips with inadequate power will cause poor performance, and possibly cause damage to the chip if left running like that.

Actually, it is from a single controller if i'm not mistaken. You can add more usb controllers by adding PCI USB cards. also, some motherboards have multiple controllers.

USB can chain 127 devices ffrom a single port

I got mine today too.  Busily updating p2pcoin to run them.

Got mine. Thanks for this. Can't wait for next shipment!  Plugged it in and cgminer started hashing on it right away. Love it when things just work. Wish all ASIC vendors ran a tight a ship as you.

I'm starting to get a flood of emails from stamps.com as the orders get delivered!  I hope everybody is happy with their new mining hardware.

A guide has been posted on how to setup Block Erupters on Windows at http://www.btcguild.com/index.php?page=support§ion=blockerupter

A linux guide will be posted within the next hour as well.

Yay!  I think we're going to see a lot of happy people today.  A huge bulk of the orders that shipped out on Tuesday are supposed to arrive today.  Close to 75-80% based on the sample I took.  Of course, that's USPS Expected Date, so it may not take rural areas into account properly.  Luckily, USPS delivers on Saturday too!

4x Block Erupters received.  They are now merrily hashing away on a Raspberry Pi system alongside the one I had running there initially.




Thanks!

80gh sounds like a lot to me but then I notice the guys with 1000gh, did they appear with asic or before even

Whats the most USB anyone have running at the same time, its like 250 at most on 1 machine I think.   I estimate that borg cube like machine  would earn back a stick every half day

39 GH/s?  Not sure where that came from unless you were checking my speed under Team America (User ID 1).  It's closer to 80, been playing with Avalon firmware/overclocks today.  Until yesterday I only had 2 GH/s

He's already got 39GH/s not sure he needs more ;-)

worst comes to worst, he  mines with them.

I won't be keeping huge inventories after the initial rush.  Once they have inventory available again, I'll be ordering [Backorder Queue + 10%] each time I place an order.

eleuthria, what are you going to do if you order 1000 pieces, then friedcat drops the price in half again. Then you're stuck with a bunch of those things.

just out of curiosity, have all the ASICs that you have been shipping been red, black, and silver, or have you gotten some of the yellow/gold ones as well?

okie...