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1  Bitcoin / Hardware / Re: ANTMINER S5: 1155GH(+OverClock Potential), In Stock $0.25/GH & 0.51W/GH on: February 06, 2015, 02:11:10 PM
Anyone tried this fan in the S5 to replace the stock fan?

http://www.ebay.com/itm/Free-Shipping-Delta-120mm-12cm-PWM-TFC1212DE-252CFM-12038-DC-12V-cooling-fans-/171668885436?

It has a very high air flow with claimed RPM of 5000. Sounds like a good upgrade.
2  Bitcoin / Hardware / Re: ANTMINER S5: 1155GH(+OverClock Potential), In Stock $0.25/GH & 0.51W/GH on: February 05, 2015, 01:10:43 AM
Today I added a Delta AFC1212DE which has 148cfm at 3900 rpm which is being run through molex so it's going full speed. I also have a second fan running in a pull configuration at 1800 rpm. But for some odd reason Row 1 is 58 degrees and row two is 44. There is A LOT of air being pushed and pulled through this miner, why is one side way hotter? Should I RMA? I've only been running it for 5 days. I should also add I'm running it at the stock 350 setting. So no overclocking. Also the temperature in the garage is 58 degrees Fahrenheit / 14 degrees Celsius.

EDIT 1: It has now started restarting mining every 7 minutes or so. It will be at 1Th then all of a sudden drop to 0 and then start to climb back up. There are no X's.

Hi,

I too had similar experience as quoted, however mine did not restart every 7 mins. When I first got my S5, it was working flawlessly for good 2 days. Then the hashing rate would gradually drop and eventually to 0 and restart. Its left at default freq of 350, temp was around 54 in the mornings and 56 highest during the day. Its powered by a CoolerMaster v1000 PSU which is running cool all day.

I turned it off for 5 mins and started again but after running around 30 mins or so it will happen again. I have another 2 units of C1 running 24/7 which does not seems to have any problem, so I guess that rules out the internet connection possibility. I inspected the blades but could not find any burned or damages. The time it takes to enter the reboot cycle is not consistant, at times it happens in a few minutes or sometimes a few hours. I got my S5 via the DHGATE link at Bitmain's site together with a friend and he too has the same problem. Currently to get stability, we ran the freq at 300 and 325 respectively.

Any ideas?

Thanks.
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