Antminer s5 Optimization

[Jeyl]

Ok comrades, my Antminer is slowing down and I need to figure out what her deal is. First, the details.

Miner Type:   Antminer S5
Hostname:   antMiner
Model:         GNU/Linux
Hardware:    3.4.3.0
Power Source:   Corsair CX 750

I remember when I first started this unit that it averaged about 1100Gh/s but now according to the system it's dwindled to about 555Gh/s. One of the first things I noted that was different was that the cooling fan shifts between speeds at random. One of the blades is showing a red light next to one of the power connectors.

Steps I've taken:
1. Reset the device
2. Increase the frequency from 350m to 400m.

Both yielded negative results. I'm requesting suggestions on what I should do next.

[MarkAz]

Increasing the frequency won't help if it's having issues with one of the blades... Try decreasing it to 300 and see if the other blade responds.  Otherwise you may just have a bad blade, maybe inspect it to see if something failed on it (like a capacitor).

[VirosaGITS]

Ok comrades, my Antminer is slowing down and I need to figure out what her deal is. First, the details.

Miner Type:   Antminer S5
Hostname:   antMiner
Model:         GNU/Linux
Hardware:    3.4.3.0
Power Source:   Corsair CX 750

I remember when I first started this unit that it averaged about 1100Gh/s but now according to the system it's dwindled to about 555Gh/s. One of the first things I noted that was different was that the cooling fan shifts between speeds at random. One of the blades is showing a red light next to one of the power connectors.

Steps I've taken:
1. Reset the device
2. Increase the frequency from 350m to 400m.

Both yielded negative results. I'm requesting suggestions on what I should do next.

Thats half the speed, so i'm guessing its the common issue of a blade stopping to hash after a while. While it could be worsen by a bad PSU, it normally resolve itself. Did you try updating the firmware?

400m is too high, but on stock voltage, 393 should work for 1.29TH/s.

[flikflak]

Hi,

it seems that one hashboard drops out. It is chain1 or chain2, check the red LED on each chain (top view on the S5). You may also see it in your webinterface by checking the temps -> the dropped chain is obviously the colder one.

- check the cable and its plug from the hashingboard to the controller
- try another PSU
- some reported this issue with the latest firmware
- try to lower the speed a bit

[LoneRangir]

https://bitcointalk.org/index.php?topic=1289725.0

Yah, I'm having similar issues.  If I restart it about 4 or 5 times, I can get it back up to full speed.  I can keep it at full strength for about a week before one of the boards craps out again.

[Jeyl]

Hi,

it seems that one hashboard drops out. It is chain1 or chain2, check the red LED on each chain (top view on the S5). You may also see it in your webinterface by checking the temps -> the dropped chain is obviously the colder one.

Huh. Currently Chain #1 has a temp of 18 while Chain#2 has a temp of 45. Going to check this out. Will advise.

[bctmke]

Yep you might have to drop down the frequency or reboot a few times.  Unfortunately on occasion the S5s can get a finicky blade.  We'll see what you find !

[Jeyl]

Yep you might have to drop down the frequency or reboot a few times.  Unfortunately on occasion the S5s can get a finicky blade.  We'll see what you find !

On the occasion it does get a finicky blade, is there anyway it can be service or a means of replacing it?

[VirosaGITS]

Yep you might have to drop down the frequency or reboot a few times.  Unfortunately on occasion the S5s can get a finicky blade.  We'll see what you find !

On the occasion it does get a finicky blade, is there anyway it can be service or a means of replacing it?

You can simply find someone with a good blade to sell it to you, and you just swap it out. But this 1 blade dropping thing happen a lot, to all of my S5 and mostly stopped happening since i updated all the firmware. It does still happen but it is picked back up after a minute, so overall only a couple GH/s average is lost.