Quote from: MTPcgr on March 11, 2014, 06:01:28 PM

I'm really having some trouble understanding what's going on here. I've been running a single USB Block Erupter with BFGminer for several weeks and have seen ICA 0: with 337/332/355Mh/s. I just upgraded to an AntMiner U2 and used this guide to configure it, and it seems to be running ok around 2Gh/s, but the third number is always much lower and my pool reports much much lower speeds than even with my USB Block Erupter.

What am I doing wrong with the AntMiner to get slower speeds? And what do those three sets of Gh/s values actually mean?

......

It could be a simple fix, I ran into that issue in the beginning. For me, I find that antminer:all doesn't always pickup one of my Antminer's. I found that using "amu:all" works nice for me.

Before we go further, just for the sake of troubleshooting, run BFGminer with no commands, arguments, etc., and enter your Pool, User, and then PW manually. Next, press "M" and then "+", after that type either "all"; "amu:all"; "antminer:all"; or manually find your AMU's device COM Port and try that way - anyway will work, we just want to run a quick test. After BFGminer recognizes your device and connects to your pool see if your hashrate changes. If it does, we know the issue is simple. If not, try my configuration below.

Code:

bfgminer.exe -S amu:all -s 30 -E 60 -q 15 -o 127.0.0.1:25536 -u User.Name -p Pass.Word --set-device antminer:clock=x0881 --no-submit-stale

I run this for solo-mining. For a pool you'll want --no-submit-stale as to keep stale/bad shares off of the pool. On high-hashing Network ASIC's you can get your pool worker banned for an annoying term because of HW (Hardware Errors) and bad shares. The first new argument (or Parameter - I forget what it's technically called) is "-s" This is Scan Time [BFG Readme: --scan-time|-s Upper bound on time spent scanning current work, in seconds (default: 60)]. The next -E is Expiry [--expiry|-E Upper bound on how many seconds after getting work we consider a share from it stale (w/o longpoll active) (default: 120)]. Finally is -q or Queue [--queue|-Q Minimum number of work items to have queued (0 - 10) (default: 1)]

I am hoping this fixes everything...

Your HashRates (The one that you need is the lowest)
/5 second exponentially decaying average hash rate/An all time average hash rate/An all time average hash rate based on actual nonces found, adjusted for pool reject and stale rate

Play around with those -s, -q, -E, settings. After you are connected and running, just hit "S" and you can change them live. Just change the -o Pool address and your -u / -p user/pass info before you copy past into a .bat or CMD.

Hope it helps!

EDIT:
I remembered something!
Are you using a USB Port, Extender, Splitter, or HUB?

Mine only can supply enough wattage for five AMU's, this is what happens to the 5th:

http://i58.tinypic.com/10gbcsz.jpg

So for myself, these AMU's on a laptop are 100% worth it and profitable.