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Author Topic: Antminer S9/S9i firmware - Full voltage/frequency control - HAS HIDDEN DEV FEE  (Read 305 times)
grinbuck
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August 23, 2018, 04:13:57 AM
 #1

Update: So the firmware I posted earlier apparently has a hidden dev fee as pointed out by another user here. Have updated the title accordingly. Works fine though.

Original post:

I recently purchased firmware offering full voltage/frequency control and claiming to have no dev fee from ebay. Sharing it here for those who may be interested.

NOTE: I've used this for about a week now and see no issues on five of my S9's. I can't guarantee that there's no "hidden" dev fee but prima facie - there doesn't appear to be any.

I TAKE NO RESPONSIBILITY FOR YOUR MINERS. USE AT YOUR OWN RISK.

What I achieved:
1) Consistent reduction in voltage consumption by 15% or so. About 150w per miner give or take.
2) A marginal reduction in hash rate too. I was averaging about 14 TH/s per miner per day using standard bitmain firmware. With this firmware, though there is a reduction in power consumption, my hashrate is about 13.85 average over 7 days.
3) Note that my intention was NOT to overclock. I just wanted to reduce power consumption. OVERCLOCKING IS DANGEROUS. USES MORE THAN 1600W SO YOU'LL NEED MORE POWERFUL POWER SUPPLIES.

First download link from mega.nz - free account so download rate limited:
https://mega.nz/#!mbxSBCxR!gAcTMktLj94PoubgELS8nuqga84Lb1VnoYLVF9FuWjg

Second download link from Google drive:
https://drive.google.com/open?id=1gbEnUfsKisDEYsWosvVpH_sJt575zLcO

Some screenshots:
https://imgur.com/Mh3DEV0
https://imgur.com/evbDXSQ
https://imgur.com/wYP9t3z

Cheers!

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butok
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August 23, 2018, 06:54:26 AM
 #2

IT HAS HIDEN DEV FEE
This firmware is from https://bitcointalk.org/index.php?topic=4575654.0
Files are identical!!
Dev. fee is 1.8%
grinbuck
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August 23, 2018, 11:15:15 PM
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Argh! Ok. Thanks for the heads up. Should've known better than to trust someone from Ebay. Have reverted to standard bitmain firmware on all miners except one which I absolutely need to undervolt in order to stay within the 80% stipulated maximum draw from one of my circuits.

Will try out the "Volt RocketShip" firmware at https://bitcointalk.org/index.php?topic=4513567.0 instead. At least the code for that is open source!

Lesson learnt.

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butok
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August 24, 2018, 05:45:52 AM
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You may ask eBay to return your money back, as the item you have received does not correspond its description Wink
grinbuck
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August 24, 2018, 05:48:27 AM
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You may ask eBay to return your money back, as the item you have received does not correspond its description Wink

Yeah but how do I prove the existence of a dev fee? I only have your word for it.... it's not apparent anywhere else in the software. Wish I knew how to examine outgoing network traffic from the miner using fiddler or wireshark .... but I dont.

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butok
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August 25, 2018, 08:29:15 AM
Merited by frodocooper (3)
 #6

So, I decided to do experiment and go your way to buy it on Ebay https://www.ebay.com/itm/401574456180
Finally, it had dev. fee. So I have returned money back.
So, do not afraid, you are able to cancel order too as it does not correspond to description (eBay policy).
After that, the eBay seller has removed no dev. fee from caption and its description.


grinbuck
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August 28, 2018, 08:34:13 AM
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Thanks. I took your advice and just requested a refund on ebay. Let's see how it goes! Cheers!

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butok
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August 28, 2018, 08:38:18 AM
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What is your Ebay seller name? My was jti1.
grinbuck
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August 28, 2018, 08:49:31 AM
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Somebody called northeast212. The link to the product page is

https://www.ebay.ca/itm/Antminer-S9-S9i-Bitmain-Custom-Firmware-No-Dev-Fee/223113782162?hash=item33f29e2392:g:PEMAAOSwA~Jbcke3

Again... thanks for being so helpful about this. Really appreciate it! Smiley

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grinbuck
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August 29, 2018, 07:59:20 AM
 #10

So, I decided to do experiment and go your way to buy it on Ebay https://www.ebay.com/itm/401574456180
Finally, it had dev. fee. So I have returned money back.
So, do not afraid, you are able to cancel order too as it does not correspond to description (eBay policy).
After that, the eBay seller has removed no dev. fee from caption and its description.

Hey @butok - I got the refund. Care to share your BTC address? I'd like to share the spoils with you since it wouldn't have crossed my mind to request a refund had it not been for you mentioning it!

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butok
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August 29, 2018, 08:53:08 AM
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You are so kind Smiley
BTC address: 35tuMojs9S9X6meQxta86m115ehtvsidDn
grinbuck
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August 29, 2018, 10:21:35 AM
Merited by frodocooper (3)
 #12

You are so kind Smiley
BTC address: 35tuMojs9S9X6meQxta86m115ehtvsidDn

There you go. A small token of my appreciation sent. Cheers!  Smiley

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butok
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August 29, 2018, 10:24:08 AM
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Thank you so much bro. Wink
This is historical moment for me, to receive BTC not from mining Smiley
grinbuck
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August 29, 2018, 11:46:16 PM
 #14

Thank you so much bro. Wink
This is historical moment for me, to receive BTC not from mining Smiley

You're welcome. Keep up the good work! Smiley

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