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Antminer S2 both found dead this morning
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Topic: Antminer S2 both found dead this morning (Read 2773 times)
fatso98
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Antminer S2 both found dead this morning
July 18, 2014, 08:03:10 AM
#1
I think my 2 antminer s2's overheated in the night reaching 80 degrees. There seems to be no life in them this morning. Is there a way of resetting them. I can't get onto the IP as the power supplies are not coming on.
Cheers
MelodyRowell
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Re: Antminer S2 both found dead this morning
July 18, 2014, 10:38:04 AM
#2
I believe antminer warranty is 3 month. So be quick..
fatso98
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Re: Antminer S2 both found dead this morning
July 18, 2014, 02:01:17 PM
#3
Quote from: MelodyRowell on July 18, 2014, 10:38:04 AM
I believe antminer warranty is 3 month. So be quick..
Cheers I managed to sort it by pulling the jumper from the atx power lead powering it switching it off re fitting the jumper & all started fine.
What are the implications of unchecking the check box on the 80 degree cut out.
Has anyone done that?
Cheers
krfighter
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Re: Antminer S2 both found dead this morning
July 18, 2014, 07:09:16 PM
#4
It did not overheat. The power supply just could not handle the load and shut itself off.
It is a standard problem with the stock supplies: they run at the very very limit of their capacity.
You have three options to avoid this in the future:
1. Run in a cooler room
2. Slightly reduce the frequency, say from 196 to 190.
3. Upgrade to a more powerful PSU, say 1200W
Good luck!
fatso98
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Re: Antminer S2 both found dead this morning
July 18, 2014, 08:26:53 PM
#5
Oh OK, cheers.
How would you reduce the freq to 190 & would this slow the machine down much?
Cheers
krfighter
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Re: Antminer S2 both found dead this morning
July 18, 2014, 09:48:26 PM
#6
take a look at this post:
https://bitcointalk.org/index.php?topic=629997.0
It is a linear dependence on frequency, so if you lower from 196 to 190 you should at about 970 GH/s nominal
fatso98
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Re: Antminer S2 both found dead this morning
July 18, 2014, 10:38:29 PM
#7
Quote from: krfighter on July 18, 2014, 09:48:26 PM
take a look at this post:
https://bitcointalk.org/index.php?topic=629997.0
It is a linear dependence on frequency, so if you lower from 196 to 190 you should at about 970 GH/s nominal
Brilliant thanks, I have just underclocked it to 193 for a start & will probably buy a new PSU...
Cheers for your help
fatso98
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Re: Antminer S2 both found dead this morning
July 19, 2014, 09:20:51 PM
#8
After a day of running these with all the lowest pre set freq of 193 un #'d I seem to be having approximately 50% worth of duplicate blocks.
Can someone advise me what the following should be I currently have them set as follows?
Option 'freq_value' '4f02' #193M
Option 'chip_freq' '193'
Option 'timeout' '85'
Really appreciate anyone's help
Thanx
krfighter
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Re: Antminer S2 both found dead this morning
July 19, 2014, 11:34:08 PM
#9
The timeout is too high. Change it back to 40 and it should be back to normal
fatso98
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Re: Antminer S2 both found dead this morning
July 20, 2014, 04:14:39 PM
#10
Thank you that's awesome.
Cheers
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