Topic: ANTMINER S5: 1155GH(+OverClock Potential), In Stock $0.319/GH & 0.51W/GH - page 194. (Read 451039 times)

Can I buy several controller boards seperately, just to have some spare parts for S5 owners here in Russia?

That would be a great idea.

Maybe Bitmain should have a manual or list of things that would state what actions would void the warranty.
Changing fans with less than x CFM.
If changing or modifity the firmware.
if OCing the device.


i know these units can OC well, but some users/owners dont factor in the effects of OCing.

In the end we will know what will/might/will not be covered under warranty.

It is very "convenient" for final consumers. Why don't Bitmain issue a technique of reflashing the controller at home in case of any failures?

Do we have any reason to presume that either CGminer 4.8.0 or 4.9.0 provides extranonce.subscribe support?

Is there a fix for the S5 getting stuck/not failing over to secondary pool, on Nicehash/Westhash when the p=price password is used in combination with #xnsub ?
I just confirmed it happened on 5 S5s overnight for around 7 hours.  0 accepted hash and did not fail over to second pool until I removed #xnsub.  Not sure if electricity was used or not, that would be terrible.

My SP20s are working now with this after the FW update, but my S5s which are much more numerous still stick on nicehash doing 0 accepted hash and not failing to the secondary pool if #xnsub is used while the p=price is not met.
Using Jan 7th Firmware for S5.
No other password arguments are used as that seems to break it for any ASIC

As far as I am aware, bitmain's own firmware is the ONLY one documented (in these very threads!) as having bricked their own hardware. More to the point though, there are adequate warnings with the mods (hardware & software) to not warrant sensationalizing by dogie.

And NO, that mod can NOT brick your S5 as it will not even survive a reboot (I am working on a firmware mod that will persist on reboot though).

As its a custom firmware, there is always a chance it can brick and then you'll have to send your controller in to be reflashed. You should also be vigilent and check nothing has been mixed in or changed by going through the source yourself.

And as a reminder, modifying the designed cooling system (by replacing fans or custom firmware) WILL invalidate your warranty. You should consider this a mod that you undertake at entirely your own risk.

Glad to hear it. That's exactly the point of the US centre, so Bitmain can provided fast moving RMAs for US customers.

Hi guys,
After the software mod done for the fan speed of the s4 (see here and here) , here is the s5 fan mod able to change the S5 fan speed by changing software.   This allows to effectively  decrease the noise from the s5 AND to decrease the power consumption by a maximum of 10 watts.
It should not be used if the temperature is > 70°C. Check that the stop miner when temp is over 80°C box is checked in the configuration page.

If this helps you, consider my bitcoin address :
1NfUptoShEtSD2SQV2f45Xr1bTysFnsHiU

I have modified the bitmain_spi.ko file into two others binaries which gives differents fan speed.

First version with lower fan speed:

Download here :  
https://mega.co.nz/#!MVtHXBKC!VEymK0FxLpuXTl5ZpxnNxlQNKOsp15V0vRy18Vb7dPI

Second version with much lower fan speed: it should not be used if the temperature is > 70°C. Check that the stop miner when temp is over 80°C box is checked in the configuration page.

Download here :
https://mega.co.nz/#!JFNnQALR!3x501jLm1GyzUlDMZ4USWGmDHYCyZKSSiNp4UWRWUnM
The original is here if you need it :
https://mega.co.nz/#!1ENCRYIb!pbSf4wXt4nwX_0IYTH1LRh0mZ9_Gw3KgbCel8zyhOjo

To use it :
Change 192.168.0.16 with the Ip address of your miner


scp bitmain_spi_s5_fan_6.ko [email protected]:/config/           #Copy the file to the miner

then ssh to the miner :
ssh [email protected]
then :
cp /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko /config/bitmain_spi_original.ko        #Makes a backup
cp /config/bitmain_spi_s5_fan_6.ko /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko         # Copy the new file to the good place
cd /etc/init.d/ #Change directories
./cgminer.sh stop         # Stop cgminer
sleep 1
./cgminer.sh start         # Stop cgminer

#Wait 30 secondes

Check the web page at 192.168.0.16, you should be able to see the new lower fan speeds

If my new binaries help you and you are satisfied, help me by sending some bitcoins to my address:
1NfUptoShEtSD2SQV2f45Xr1bTysFnsHiU

Warning: Do nothing you don't understand ; No warranties whatsoever are given by me ; this could not work or be useless ; this could burn your S5 or make it useless ; this could void your warranty with bitmain.

Since nothing survives a reboot on a S5, you'll have to do this a little different than the S4 to test without repacking the firmware.

To use it :
Change 192.168.0.16 with the Ip address of your miner

scp bitmain_spi_fan_6.ko [email protected]:/lib/modules/3.8.13/kernel/drivers/bitmain/           #Copy the file to the miner

then ssh to the miner :
ssh [email protected]
then :
cp /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko /config/bitmain_spi_original.ko        #Makes a backup
cp /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi_fan_6.ko /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko         # Copy the new file to the good place
cd /etc/init.d/ #Change directories
./cgminer.sh restart         # Restart cgminer


I've tested both files:

Ambient temps here today are -5 C & I'm running 9 miners in this rack.
bitmain_spi_s5_fan_6.ko runs the fans at 3240 RPM and temps are averaging 56 C
bitmain_spi_s5_fan_3.ko runs the fans at 2760 RPM and temps are averaging 66 C

No, it can't brick it but you have to watch the temps (must be < 70C).
When you reboot, the modification will be gone, it is not persistent as it is not in the firmware.

Now is too late. I'm going to sleep. Maybe tomorrow...

p.s. can it brick my S5?

S5 firmware fan speed mods .....

I stumbled accross this topic https://bitcointalksearch.org/topic/--940250 where they had a mod for the S4, and thought about making a firmware mod for the S5, in the process, the person who made the original mod to the module controlling the S4 fan has come up with a mod for the S5. Here's the link to the message: https://bitcointalksearch.org/topic/--940250.msg10327889#msg10327889

I have not tested the firmware as I received my S5 with the stock fan DOA (got in touch with bitmain and they want me to take videos of it and / or buy something from them before  ... blah blah ... for another day that one!). If anyone is willing to give the modded firmware, please give it a go and provide feedback. there are links on the messaage, but I'll reproduce them below too:

1. fan_6 - slower than stock - https://mega.co.nz/#!MVtHXBKC!VEymK0FxLpuXTl5ZpxnNxlQNKOsp15V0vRy18Vb7dPI
2. fan_3 - slower than fan_6 - https://mega.co.nz/#!JFNnQALR!3x501jLm1GyzUlDMZ4USWGmDHYCyZKSSiNp4UWRWUnM
3. stock firmware (also on bitmain site) - https://mega.co.nz/#!1ENCRYIb!pbSf4wXt4nwX_0IYTH1LRh0mZ9_Gw3KgbCel8zyhOjo

If you try the firmware, please provide feedback either here or on the thread linked above to lanfeusst. This mod can also be the pilot for a permanent mod for updating cgminer et al!

I have to give props to the Bitmain service center in CO. I sent my S5 to them (from Phoenix) for service on Monday and had it back by Friday. No report on what was fixed or repaired, and it doesn't really matter. The unit now works great.

Yeah that's okay. If the chips [sensor] were at 80C I'd still be surprised if there was enough radiating heat to warp the [assumed] PP/PC sheets so its a weird one. The 80C safeguard does work though, its been tested.

will do - wasn't trying to start something, was just curious about the 80C safeguard

Yes, but we're not talking about the contract for sale, we're talking about the manufacturer's warranty.

If you buy an appliance at Walmart or Target or other retailer you usually can return a defective item to them for a cash refund but the manufacturer will often still provide a method to get a repair or replacement directly or through a service center. Appliance makers don't usually tell end-users to take a hike if it wasn't purchased directly from them.

I didn't say they were, but look at the problems some of these resellers put up as soon as you try and return anything. Bitmain can't force external companies to do anything, so can't get involved with what is essentially a 3rd party dispute. If you purchase from a reseller, your contract and sale is with the reseller.

No one is trying to buy from a re-seller and return to Bitmain for a refund!
The discussion is about warranty service, for which Bitmain can and would always repair or replace defective merchandise. I can't imagine a scenario where the issue a refund in lieu of repair or replacement during the 3 month warranty period.

The only remaining variable is when was the item purchased to determine warranty period, but that concern should be irrelevant during the first 3 months after the release of a new product since ALL items are under warranty at that point.

To me it seems strange, that a board failure is SO rare on the 10,000s of units out there, yet TWO happen on the same unit simultaneously. Statistically that just isn't possible, there must be something environmental influencing the situation - whether its the fan was changed out, someone tried pushing an overclock too far etc etc. The warped plastic panels also don't appear to make sense, there is no reason why the air on those panels would get anywhere near the 105C or so to melt them.

My personal opinion is we're not getting the full story, but its not up to me to decide. PM BitmainWarranty to arrange an RMA. Be sure to link to your post describing the issues, what type and how many miners you wish to have repaired/replaced and your bitmaintech.com order number.