Quote from: anw on January 28, 2014, 02:32:14 AM

Quote from: Jay_Pal on January 26, 2014, 10:17:45 PM

Quote from: anw on January 26, 2014, 10:05:21 PM

hey,

I have an antminer which is running anormaly slow.
[...]
This antminer has been tested with different hubs (dlink, 49-ports...), alone, but it never reached more than 0,1Gh/s.

The 21 other units are working very well, so I guess the item is faulty Huh

Screws are tight... and it's not getting hot at all ... Any idea?

Two ideas:
1) you are running the miner for a short period - wait at least some hours
2) that is the hash rate the pool sees - with zero shares it is quite natural the hash rate is bad and dropping!!
Please, don't run the miners for 1 minutes and complain of slowness... I see AMU 0 running at 2.10 and the other two at 1.98!!!

1) I had it run for one day, no luck. bfgminer is reporting correct (5s avg/all time avg) but "effective avg" is < 0.1ghs and it produces very low shares.
And running it on cgminer I'm getting those results:

Code:

2) Yes, even after running it for hours it doesn't produce more shares. I have 27 other AMU running fine, that's why I wonder what happens with this one...

Quote from: chromosoma on January 26, 2014, 10:16:53 PM

Measure different voltages on the testpoints.

I'd like to know how to do that... I have a multimeter but have no clue what should I measure... I'm more in software than hardware ehe Grin

Ahh!!! now we're talking!!
Now I see a quite number of shares to compare.
Tell us one thing: have you tried to plug that one on other port?
Sometimes I have a somehow similar problem, but it vanishes after restarting my cgminer (but I'm no example since I'm on Linux and it behaves quite different).
Try hot-unpluging it (leave the others running normally) and hot-plug it on another usb.
Wait about one hour and post the results, please.
If I manage to find some time later today, I'll pick one image posted in this forum and detail you how to use the multimeter.