[GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] - page 11.

allcoinminer

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Quote from: mstrongbow on June 26, 2014, 04:47:48 AM

Nice! Just underclocked my Ants, awesome guide.

I will fill in some of the frequencies above...I found a few googling around.

Take a look at BitMain's own undercloaking post.
It will give you an extra edge on down clocking and down volting.
It uses variable POTs to control voltage to the ASICs.
The Resistors adjacent to the DC-DC converter need to be removed and attach a pot there.
You need 1 pot for each DC-DC converter. The pot can be obtained from local market or ebay.
Pencil mod will also work but with a little effort I recommend Bitmaintech's own hardware hack method especially if you are a Do-It-Yourselves guy.
I will post the link to that post.
You can do it yourselves or can get help from any DIY guy or an electronic repair shop.

Update: Here is BITMAINTECH official undervolting/underclocking post https://bitcointalksearch.org/topic/m.7031946

mstrongbow

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Brassguy

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Quote from: leptar on June 22, 2014, 05:20:29 AM

thanks philipma1957..

anyone take it to .75v?

I'm going to try to test the lower bounds in a couple days.

Here's all of the frequency settings I nave been able to find. The list isn't complete and is lacking some timeout numbers. I think I have the info for 200mhz and 193mhz. I just have to dig around.

Code:



#option 'freq_value'    '4f81'  #205GHs (16x)
        #option 'chip_freq'     '400'
        #option 'timeout'       '35'

        #option 'freq_value'    '5f05'  #202GHs (15.75x)
        #option 'chip_freq'     '393.75'
        #option 'timeout'       '36'

        #option 'freq_value'    '5e85'  #198GHs (15.5x)
        #option 'chip_freq'     '387.5'
        #option 'timeout'       '37'

        option 'freq_value'    '5e05'  #195GHs (15.25x)
        option 'chip_freq'     '381.25'
        option 'timeout'       '37'

        #option 'freq_value'    '4e81'  #192GHs (15x)
        #option 'chip_freq'     '375'
        #option 'timeout'       '38'

        #option 'freq_value'   '6c09'
        #option 'chip_freq'    '370.83'
        #option 'timeout'      '??'

        #option 'freq_value'    '5d05'  #188GHs (14.75x)
        #option 'chip_freq'     '368.75'
        #option 'timeout'       '38'

        #option 'freq_value'    '6b89'  #188GHs (14.75x)
        #option 'chip_freq'     '366.67'
        #option 'timeout'       '38'??

        #option 'freq_value'    '5c85'  #185GHs (14.5x)
        #option 'chip_freq'     '362.5'
        #option 'timeout'       '39'

        #option 'freq_value'    '5c05'  #182GHs (14.25x)
        #option 'chip_freq'     '356.25'
        #option 'timeout'       '39'

        #option 'freq_value'    '4d81'  #180GHs (14x) (default)
        #option 'chip_freq'     '350'
        #option 'timeout'       '40'

        #option 'freq_value'    '4c81'  #168GHs 
        #option 'chip_freq'     '325'
        #option 'timeout'       '45'??

        #option 'freq_value'	'0a81'	 #275
        #option 'chip_freq'	'275'
        #option 'timeout'	'51' or 45??
        
        #option 'freq_value'    '0a01' #267M
        #option 'chip_freq'     '267'
        #option 'timeout'	'53'

        #option 'freq_value'    '5102'   
        #option 'chip_freq'     '218.75'
        #option 'timeout'       '58'??

        #option 'freq_value'    '5082'   
        #option 'chip_freq'     '212.5'
        #option 'timeout'       '65'??

        #option 'freq_value'    '5002'   
        #option 'chip_freq'     '206.25'
        #option 'timeout'       '68'??

        #option 'freq_value'    '0781'   
        #option 'chip_freq'     '200'
        #option 'timeout'       '70'

        #option 'freq_value'    '4f02'   
        #option 'chip_freq'     '193'
        #option 'timeout'       '70'

leptar

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thanks philipma1957..

anyone take it to .75v?

philipma1957

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'The right to privacy matters'

Quote from: Rock53 on June 21, 2014, 05:41:54 PM

I have 10 S1 miners and I have 6 Thermaltake 1000w PSU's - I thought that I could run 2 of the miners on a single 1000w Thermaltake, but I can't. I have an 850w Corsair and I can run 2 S1 miners. None of my miners are overclocked. Maybe by under-volting my miners, I can run 2 on one of the Thermaltake PSU's. Will the drop in hashing be more than made up for in electricity savings by using 1 PSU instead of 2? Does anybody have any other suggestions about why I can't run 2 miners on a Thermaltake, but can on a Corsair? I don't want to spend any more money on buying more Corsairs' Has anyone had this problem? How did you fix it?

I had your issue with fractal 1000 watt psu's. you could buy this psu it runs 3 and is on sale

195 usd

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438011&cm_re=evga_1300-_-17-438-011-_-Product

35 usd rebate form

http://images10.newegg.com/uploadfilesfornewegg/rebate/SH/EVGA17-438-011Jun17Jun2314yh62us.pdf

you can do the pencil mod and clock your gear to 300 freq hashes at 140-150gh pull 180 -200 watts.

elpres

newbie

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Have you tried using different PCI-E connectors?

Rock53

newbie

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I have 10 S1 miners and I have 6 Thermaltake 1000w PSU's - I thought that I could run 2 of the miners on a single 1000w Thermaltake, but I can't. I have an 850w Corsair and I can run 2 S1 miners. None of my miners are overclocked. Maybe by under-volting my miners, I can run 2 on one of the Thermaltake PSU's. Will the drop in hashing be more than made up for in electricity savings by using 1 PSU instead of 2? Does anybody have any other suggestions about why I can't run 2 miners on a Thermaltake, but can on a Corsair? I don't want to spend any more money on buying more Corsairs' Has anyone had this problem? How did you fix it?

philipma1957

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'The right to privacy matters'

mstrongbow

it is two step.

do the pencil mod or solder in a pot

then ssh the freq down a bit. mine are 275 and 300. for my 3 s-1's two are at 275 and 1 at 300.

these freq's gave me the total of 420gh and 560 watts and pretty low on errors.

mstrongbow

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3D Printed!

philipma1957

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'The right to privacy matters'

Quote from: leptar on June 15, 2014, 12:21:26 PM

Question for those that know...

when using potentiometers, besides the 10k adjustable value what else should we be looking at?

I am seeing huge fluctuations regarding wattage ratings from .08w to .3w...

26 or 28 AWG tinned plated stranded wire should be sufficient..

TIA.

if the .3w don't cost much more you can use them.

remember the oem resistors are smd very small in physical size. a big bulky oversized pot is not needed.

leptar

member

Activity: 91

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Question for those that know...

when using potentiometers, besides the 10k adjustable value what else should we be looking at?

I am seeing huge fluctuations regarding wattage ratings from .08w to .3w...

26 or 28 AWG tinned plated stranded wire should be sufficient..

TIA.

philipma1957

legendary

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'The right to privacy matters'

MY 3 are doing 420 gh pulling 560 watts at the plug.

so that is 1.33 watts a hash at the wall…… stable being doing it for about 1 month.

1)low errors
2)low noise
3)low heat

jwcastle

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Thank you VERY much for the helpful tutorial. During the summer months when the temperature is high, I like to lower the hash rate slightly. Combining that with undervolt method makes my rigs run much cooler. All of my rigs are running at ~130GH/s with each drawing ~170 watts at the wall.

Cheers!

Brassguy

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Quote from: wpgdeez on June 09, 2014, 12:30:00 PM

Quote from: Brassguy on June 09, 2014, 11:51:52 AM

Quote from: Trends on June 06, 2014, 02:57:14 PM

If you have the skills it's the best way to go.
Congrat's. Got pic's?

Sure do! sorry for the bad pic, I put it into service immediately Grin

Hot melt glue, 10K pots, works great!

So you used a glue gun instead of solder? How much do the pots cost?

No. The hotmelt glue was for the pots and wires... standard solder used for the wire connections. Pots were 50 for $17.20 shipped via ebay. You can get them cheaper from china but I got them in 2 days from a US seller.

wpgdeez

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Quote from: Brassguy on June 09, 2014, 11:51:52 AM

Quote from: Trends on June 06, 2014, 02:57:14 PM

If you have the skills it's the best way to go.
Congrat's. Got pic's?

Sure do! sorry for the bad pic, I put it into service immediately Grin

Hot melt glue, 10K pots, works great!

So you used a glue gun instead of solder? How much do the pots cost?

Brassguy

full member

Activity: 139

Merit: 100

Quote from: Trends on June 06, 2014, 02:57:14 PM

If you have the skills it's the best way to go.
Congrat's. Got pic's?

Sure do! sorry for the bad pic, I put it into service immediately Grin

Hot melt glue, 10K pots, works great!

marunga

newbie

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Hi,

I suggest multi turn pots. Glue them with double-sided tape near the orange caps and use pcb jumper wire to connect to the resistors (the type of wire used to repair PCB tracks).

The potentiometer in the picture is not soldered to the resistor, but you get the idea...

http://31.media.tumblr.com/ca128cd98d3d84d9ff29d52efc6fc045/tumblr_n6yhjviglj1sepsqdo1_1280.jpg

rgds,
m

Trends

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If you have the skills it's the best way to go.
Congrat's. Got pic's?

Brassguy

full member

Activity: 139

Merit: 100

@Trends The 10k pots work great!

Chips are at .91v
Frequency 300mhz
Hashrate 153gh (<.5% HW)
Wattage 216w at the wall

WinterParker

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Activity: 356

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Dock.io

Quote from: Littleshop on March 22, 2014, 10:29:53 AM

Quote from: klondike_bar on March 22, 2014, 10:06:34 AM

nice job!

however, I dont see any point to unervolting at this point. maybe by late summer when the the difficulty is as high as the temperatures, but right now getting the most hashes per second is my focus

If you have no more space, no more power and the room is getting too hot, this is helpful.

check, check, & check..... undervolting it is! so I can stop blowing breakers over here..

Topic: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] - page 11. (Read 69365 times)