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Author Topic: Avalon 721 Low Hash Rate  (Read 416 times)
lau94411
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November 02, 2017, 11:53:59 AM
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Hi Guys!!!
I  have started for mining Bitcoin for 3 weeks by using 2 nos of Avalon 721 , which provide 12TH/s hashing power in total.

However, the hash rate drop from 12TH/s to 10.5TH/s in this 2 days. Huh

Is there any reasons to explain this situation?


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Steamtyme
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November 02, 2017, 06:55:53 PM
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It's hard to say. Did it maintain 12 TH/S for long. The drop is not crazy, as there will be ups and downs with hashrate. Do you see anything when you check the miner status page? You might need to post your log to see if anyone can find a problem there.

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November 06, 2017, 11:35:06 PM
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What kind of power supplies are you using and are the plugs warm? As supplies hit limits the voltage to the miner drops which can cause burned plugs or reduced speed. I fix burned plugs, but would rather people not blow them up.

Can you check the voltage at the miner either by looking in the admin console or with a meter?

C
edrich
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November 07, 2017, 05:41:30 PM
 #4

Hi Guys!!!
I  have started for mining Bitcoin for 3 weeks by using 2 nos of Avalon 721 , which provide 12TH/s hashing power in total.

However, the hash rate drop from 12TH/s to 10.5TH/s in this 2 days. Huh

Is there any reasons to explain this situation?


It could be that it is overheating, thus reducing hashpower.
Also check the voltage on the miner to check that it is getting enough power from the power supplies.
lau94411
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November 09, 2017, 09:20:37 AM
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It's hard to say. Did it maintain 12 TH/S for long. The drop is not crazy, as there will be ups and downs with hashrate. Do you see anything when you check the miner status page? You might need to post your log to see if anyone can find a problem there.
Yes, It mantain 12TH steadily for a long time.
Steamtyme
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November 09, 2017, 09:46:57 AM
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It's hard to say. Did it maintain 12 TH/S for long. The drop is not crazy, as there will be ups and downs with hashrate. Do you see anything when you check the miner status page? You might need to post your log to see if anyone can find a problem there.
Yes, It mantain 12TH steadily for a long time.

Okay well for anyone to help we need a lot more info, like answers to

What PSU's you are using?
What are your room temps?
Can you post your logs from cgminer?
Also is it staying at 10.5 TH/S or is it going up and down?

luckily 10.5 isn't to bad.

lau94411
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November 10, 2017, 10:04:32 AM
 #7

It's hard to say. Did it maintain 12 TH/S for long. The drop is not crazy, as there will be ups and downs with hashrate. Do you see anything when you check the miner status page? You might need to post your log to see if anyone can find a problem there.
Yes, It mantain 12TH steadily for a long time.

Okay well for anyone to help we need a lot more info, like answers to

What PSU's you are using?
What are your room temps?
Can you post your logs from cgminer?
Also is it staying at 10.5 TH/S or is it going up and down?

luckily 10.5 isn't to bad.

I am using 1400W PSU
The room temperature around 25 Celsius degree, but I place the miners in front of the air conditioner. Therefore, the temperature should not be the problem.
I try to post the log, but I don’t know how to do it😓.

BTW, I set the voltage offset to +1 now, the average hash rate rise to 11.2TH.

Is it fine for the miner when I set it like that?
Thanks
Logan4el
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November 10, 2017, 11:05:43 AM
 #8

What is the voltage from the wall?
What is is the voltage on PCI-E connector?
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