hi all,

ive been mining with asics since 2015 and since then have purchased and maintained 11 x antminer s3's, one sp20 jackson and some other dragon miner that gets about 1th. Anyway, throughout the years ive been pretty lucky with how little has gone wrong.
Ive had the odd pci cable melt on me due to high draw/poor cables etc and the odd fan fail.

All of these units are now getting pretty old and tired (filled up with dust) etc. I do take one of the shelves every now and then to dissemble and clean with an air blaster and ive also even tried to repaste some of the asic's.

However some of my machine are starting to get the odd non functioning chip (Im mainly referring to the antminers when i say this)



My Main question is does anyone offer a repair server in the UK or US to have these chips replaced (i think the term is reworked)



My second question is a bit more of a read if youd like to continue. - a year or so back i purchased another antminer s3 for spares and repairs. so far i managed to make use of the 2 cooling fans for my tired equipment but always wanted to see if i could repair it so i could atleast get some hashing power out of it.

The main issue with this was the control board would light up red and not do anything else. After alot of tinkering and using a TTL cable via putty i managed to rewrite the firmware to the antminer s3 control board. HOWEVER when entering all of the information into the config page and i click save. when i go to check if it is mining it shows blank on the miner status tab-- No hashboards are viewed and im pretty much stuck there. Doing all of this with the case off i did notice the heatsync on both sides are warm so my guess is they are getting power but the software or pcb is not talking to them.


Any help / solutions would be great -- Im quite handy with a soldering iron but not down to rework skill. absolutely useless with programming but i do also know my way round a multimeter.


Thanks In advance

heres a pic of my setup  :https://ibb.co/hhCXib

Hi Guys, having same issues over here with this

only purchased all hardware last week and still havn't got to the bottom of this issue. Tried multiple fixes so any suggestions i would gratefully appreciate it in advance

My Hardware setup is as follows:
asrok h81 Pro BTC r2.0
Intel g3220
4gb ddr3
windows 10 1709 build
Latest bios Flashed via internet
4 pins are connected both sides on board
3x Nvidia gtx 1050ti's - firmware 388.43 (drivers)
3x gpu risers (https://www.amazon.co.uk/Ptsaying-Powered-Riser-Adapter-Extension/dp/B073F1QHZ5/ref=sr_1_1?ie=UTF8&qid=1512829644&sr=8-1&keywords=gpu+risers)

My issue is code 12 in device manager. I have managed to get 2 cards working at the same time but never 3. They are registering there connected however the third card will always show code 12.
https://ibb.co/kDp2Zb

heres what ive tried so far,
tried older drivers for graphics card
ive tried removing cards individually to determine if the riser's are faulty - which there not and nor are the cards
tries the suggested methods of modifying the bios i.e setting to gen 1 gen 2, None of which seem to make any difference also disabled hd audio
Tried increasing page file.
Tried adjusting registry with HackFlags method.
tried installing ubuntu however i couldnt get this to recognize 1 card let alone 2 or three. (im not a fan of ubuntu) so i gave up with this but i want it to work on windows anyway.
tried following the https://forums.geforce.com/default/topic/470858/code-12/   - however my 3rd card doesn't show on the lists
tried DDU to remove drivers and starting again (45 restarts and counting)


Ive done a few more things but im starting to run out of ideas

one question i do have - does physical RAM effect the amount of resources that can be allocated for a gpu? - bascially is 4gb ddr3 enough to run 3 gpu's? or should this not matter

Im sure its the later but i feel like im missing something really obvious here

George