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1  Bitcoin / Mining support / 2 x Bitmain Antminer U3 not running the same speeds? on: December 22, 2014, 02:09:12 PM
I bought 1 U3 miner and got it running with cgminer 4.8.0 on Ubuntu. I had some serious issues getting it going, for some reason the supplied USB did not work and as soon as I used another it went up and I overclocked a bit. Got a nice stable 59.9 Gh/s at 780mV/238Mhz - using the stock PSU and I heard it can melt if you go over 790mV.  Whatever, i am happy with ~60Gh/s

I ordered a seconds one after selling my old stuff. Again, USB cable problem, kept on going zombie and didnt detect it properly for a while.

I unplugged the first one I got, powered down the machine, used that USB cable, powered up with the new one Solo with OC settings. It detected fine but its only running at 45Gh/s

I plugged in the first one with another USB cable I had, hotplug detect, jumped straight in and went to 60Gh/s.

Ok, so I removed the OC setting and run cgminer again then it started up fine, detecting both units. But now the new unit runs at 30Gh/s and the 1st unit at 40Gh/s.

Wierd? I turned on OC again and tried various USB ports and a few other USB cables. This new, 2nd unit just wont go over 45Gh/s - Is it normal for such a large deviation in hashing?

My pool reports 112Gh/s but cgminer says 104Gh/s - but I know no to trust the pool stats. I was hopping to get just about 120gh/s with these 2 boys.

Does anybody know why this could be happening with the new, 2nd unit I bought?

2  Bitcoin / Mining / p2pool stopped paying out? But shows me as active :( on: July 19, 2013, 10:13:39 AM
I run my p2pool locally and the latest version 80202 of bitcoind.

It has been running like this for nearly 20 days with erupters. All fine and dandy until a few days ago I noticed my erning started to drop slowly.. So I changed my payout address, restarted everything, made sure its got internet connection and everything.

With the new address 3 blocks were found on p2pool. I have not had 1 payout? It shows me as active in the list.

The last address I had showed me in payouts but suddenly stopped (3 payouts ago)

Does anybody know how I can find out what the problem is?


When I look at payouts on my 2 addresses show up there with a daft amount of BTC, Completely incorrect to what I have in my wallets? (although it says there are no transaction and it was never used?)
Shows no transaction but there should be at least 2.

When I look at payout addresses neither record is in the payout but the current one is active

currenlty active: 1FWCuNvQPuXSncBSsutsHAdV3j9zDEh9GZ
old: 18765YYjFfrpqoRs85SpWKG6v1bJjx7s5Y


2013-07-13 03:12:01
OLD Address Present

2013-07-16 06:07:54
OLD Address present

2013-07-16 15:14:35
OLD Address present

2013-07-18 11:36:51
OLD address not present even though I was mining

Made new address and rebooted everything, server, routers, etc.

2013-07-18 11:36:51
old address is missing
new address is missing but shows active

and all the next blocks the same... Sad

something to do with the hard fork? .. i suspect since myp2pool is on 11 something looks like 13.1 is laters. Will try to update. But will use public pool for now.
3  Bitcoin / Hardware / Bitcoin Erupter not hashing properly? on: June 25, 2013, 12:47:07 PM
I setup p2pool on my ubuntu  12.04LTS x64 machine. Installed cgminer 3.3 and ran it. the newest cgminer is supposed to support the USB mode without any extra configuration.

I have 2 erupters on a powered usb2 hub and 2 running off the motherboard direct. the hashing is just not stable. jumping from 50mh to 300, then getting sick and restarting- there are a ton of rejects. I don't know what is wrong. I have been reading all the posts one after the other and I am stumped. Please can somebody help me.

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