Sudden GH/s drop in BFL Miner

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So basically I have a BLF non-Jalapeno variety 50Gh/s miner. I run cgminer and have recently been mining from ozcoin after eclipsemc was hit with a recent DDoS. Normally, I have been clocking at around 46.xxG-50.xxG/50.xx-51.xxGh/s. Last night I noticed a bunch of incoherent errors pop up on my terminal window. About 5-8 lines long. The miner would stall out, it dropped to around 18.xxG/19.xxGh/s stuttered around that level for a few minutes then slowly climbed back up to the rather disappointing 36.xxG-39.xxG/37.xx-39.xxGh/s I have been seeing ever since. I've poked around looking for reason for this, and maybe haven't poked hard enough, but I am at a loss. Any ideas on what is happening?

Epis

Posted 2013-12-04T03:28:42.730

Reputation: 3

How about asking this question in BLF support? – Salvador Dali – 2013-12-04T08:57:09.690

Thanks, throwing an I don't know, would have been just as helpful... – Epis – 2013-12-04T14:04:27.933

Asking a question, I have a problem that I do not know how to solve, would be just the same as your problem. There is no point to find out what is wrong. There is not enough information. I had some errors and then speed decreased - this is not a question. – Salvador Dali – 2013-12-04T19:23:27.100

My question was, "any ideas what is happening?" so fair enough, I'm curious if this is something that has happened to other people? If this could be related to the hardware, or perhaps the exchange between the hardware and a mining pool? Or is it possible that the medium, being the computer that sits between the miner and the mining pool could cause a disturbance which disrupts information flow one way or the other? I'm fishing for ideas, or people who've seen this and have some insight. That's all. But it is indeed a question. I just gave as much background information on it as I could. – Epis – 2013-12-06T06:00:36.467

Answers

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Both BFL hardware and software are quite unstable, and depend on the starting temperature of the BFL hardware.

What you can do is: stop the mining software, power off the BFL miner, and stick the BFL miner in the freezer for 5-10 minutes (or longer, say 1-2 hours) so that it can cool down.

When I got my 50GH/s, it could only run at around 25GH/s. Eventually, I found out that it is temperature sensitive. I have, once in a while, powered it down, put it in the freezer, and then powered it back up.

I get pretty impressive results that way. From an original of 8 out of 16 chips working, I now get 15 out of 16 chips working.

chuacw

Posted 2013-12-04T03:28:42.730

Reputation: 156