Antminer S3 has low hashrate

[cat2]

I have 1 S3 that has a low hashrate. I set to 250 with the miner configuration web page. I opened the asic-freq file and made sure it was set to 250. Still hashes under 400 GH/s. Any suggestions? I haven't loaded latest firmware. Should I?

I was suspecting my network but I have another S3 overclocked and hashing fine. I changed ports on the switch it was connected to. I was using a wireless bridge and changed it to a cabled connection to the router. Ive tried a couple lower frequencies but always under 400.

There are no Xs or dashes. All 0s.

[notlist3d]

Have you tried it for a length of time?  If one of the earlier batches espically a lower hash rate can lead to higher speeds.  The S3 plus obviously do better with higher freq.  Do you know what batch it is?

[cat2]

I don't know how to check what batch it is. Its been running for a couple weeks at 3 different pools. I use M's antmonitor to keep an eye on things and it's running at 450 GH/s instead of 495 I'm used to seeing on other S3s. 450 is an improvement.

[cat2]

5 minutes after getting a little happy that it hit 450 it dropped back down to 360.

[notlist3d]

I'm guessing you bought from a reseller and not direct.  Batch 1 and 2 had a ten percent off i believe it was because of lower possible hash rate.  Some of the first two batches do better at lower freq, if you go to high you will lose speed in some cases.  If you are looking at freq for S3+ espically those don't always equate to the S3 early batches.   But it should be 410 plus i believe on first batches.

[cat2]

Anybody know how to tell what batch?

[byt411]

Check if it is getting enough power, and enough cooling. Make sure you don't burn your hands when you touch the chips, and try a different PSU.

[kaykawa]

Are you tried with another PSU?

I have mines running oc with TT 550w each

[philipma1957]

set it to freq 212.5 .let it run 2 days .if you get a steady 430 most likely it is batch 1 or 2.

nothing can be done just run it at freq 212.5 and take the 430 gh.

it will save on power. so it is not as bad as you think