[GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] - page 17.

helipotte

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Pick and place? I need more coffee.

Quote from: hashfun on May 11, 2014, 10:29:20 AM

Quote from: helipotte on May 10, 2014, 10:05:34 PM

All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants!

is this without hardware modification?
what Avg speed u got @ 300Mhz

This is achieved by "pencil modding" one of the feedback resistors and indicated in the beginning of this thread. I modded them from 4.7K to about 3.3K. This produced much

lower power usage with acceptable errors (<2%). They average about 153Gh. Temps are MUCH more manageable now too.

hashfun

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Quote from: helipotte on May 10, 2014, 10:05:34 PM

All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants!

is this without hardware modification?
what Avg speed u got @ 300Mhz

helipotte

hero member

Activity: 650

Merit: 500

Pick and place? I need more coffee.

All of my Ants are operating at 300Mhz and using about 200-220W at the wall. I like only needing one CX750M for two ants!

philipma1957

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'The right to privacy matters'

Quote from: grn on May 10, 2014, 06:49:29 PM

Quote from: mstrongbow on May 10, 2014, 03:52:52 PM

Quote from: grn on May 10, 2014, 03:24:02 PM

Quote from: philipma1957 on May 10, 2014, 02:08:57 PM

Quote from: grn on April 17, 2014, 10:06:07 PM

Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300

did you ever get to this?

I have 7 ants looking to down clock and down volt.

I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now.

I have another seasonic doing the other 2.

I am at 1200gh and 2400 watts. 7 with your numbers

would be 1050gh and 1400 watts

yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it

Nice!!!

@philipma I'm actually at 1700ghs and 2200 watts, one more ant on the way this week cant beat .45 btc for this performance! Even sp cant touch it

That is impressive.

I have everything ready to start, but they are still making money running 1.4th at 2800 watts.

Getting too hot so I will need to change to the undervolt soon.

I can not complain as they still make money overclocked until we get to 20 diff.

grn

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Activity: 357

Merit: 252

Quote from: mstrongbow on May 10, 2014, 03:52:52 PM

Quote from: grn on May 10, 2014, 03:24:02 PM

Quote from: philipma1957 on May 10, 2014, 02:08:57 PM

Quote from: grn on April 17, 2014, 10:06:07 PM

Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300

did you ever get to this?

I have 7 ants looking to down clock and down volt.

I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now.

I have another seasonic doing the other 2.

I am at 1200gh and 2400 watts. 7 with your numbers

would be 1050gh and 1400 watts

yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it

Nice!!!

@philipma I'm actually at 1700ghs and 2200 watts, one more ant on the way this week cant beat .45 btc for this performance! Even sp cant touch it

bjalbert

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Activity: 166

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how do you get to .75v? Just add more graphite I would assume.

mstrongbow

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Activity: 322

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3D Printed!

Quote from: grn on May 10, 2014, 03:24:02 PM

Quote from: philipma1957 on May 10, 2014, 02:08:57 PM

Quote from: grn on April 17, 2014, 10:06:07 PM

Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300

did you ever get to this?

I have 7 ants looking to down clock and down volt.

I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now.

I have another seasonic doing the other 2.

I am at 1200gh and 2400 watts. 7 with your numbers

would be 1050gh and 1400 watts

yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it

Nice!!!

grn

sr. member

Activity: 357

Merit: 252

Quote from: philipma1957 on May 10, 2014, 02:08:57 PM

Quote from: grn on April 17, 2014, 10:06:07 PM

Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300

did you ever get to this?

I have 7 ants looking to down clock and down volt.

I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now.

I have another seasonic doing the other 2.

I am at 1200gh and 2400 watts. 7 with your numbers

would be 1050gh and 1400 watts

yes, even better 3.4 kohm getting 155ghs @ 200 watts. the evga is working great with 5 ants on it

philipma1957

legendary

Activity: 4158

Merit: 8049

'The right to privacy matters'

Quote from: grn on April 17, 2014, 10:06:07 PM

Thank you for this! 3.5kohm 150gh 213 watts at wall . going to try for 5 ants on 1 psu evga 1300

did you ever get to this?

I have 7 ants looking to down clock and down volt.

I have an evga 1300 and a seasonic 1000 they run 3 & 2 overclocked right now.

I have another seasonic doing the other 2.

I am at 1200gh and 2400 watts. 7 with your numbers

would be 1050gh and 1400 watts

ernie-

sr. member

Activity: 252

Merit: 250

Quote from: drukoz on May 07, 2014, 03:16:56 AM

if i had 1 OC ant @ 400 in stock Volt and one UC ant @ 275 with a 2.7-3.0 kOhms would i be able to run it with a 750 watt PSU
the OC ant would be around 360-400 watts and the UC would be like 150-160 watts

The wattage rating of the PSU is not a reliable guide.

You need to know how many 12volt circuits you have and what Amperage each circuit can provide. This has to be balanced across 4 x PCI-e 6pin connectors without overloading any one of the 12v circuits. An ant at 400Mhz is probably going to pull 17Amps per 12volt PCI-e connectors.

drukoz

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if i had 1 OC ant @ 400 in stock Volt and one UC ant @ 275 with a 2.7-3.0 kOhms would i be able to run it with a 750 watt PSU
the OC ant would be around 360-400 watts and the UC would be like 150-160 watts

crazyates

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Quote from: tzortz on May 02, 2014, 03:01:44 PM

Ok.

But 0.85V is designed for 128Ghs, right?

Technically, yes. He's running it slightly over the standard clock for that specific voltage.

Strictly speaking, a S1 is only "rated" for 350MHz @ the stock 1.1V, but we run all of ours at 393MHz.

tzortz

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Ok.

But 0.85V is designed for 128Ghs, right?

ernie-

sr. member

Activity: 252

Merit: 250

Quote from: tzortz on May 02, 2014, 09:38:49 AM

How did you achieve 140Gh/s with 0.85V?

In the list you say at the 0.85V will do 2Gh/s per chip. So 64 chips X 2Gh/s makes 128 Gh/s.

Do I miss something?

The stock clock does 180GH/s at 350MHz therefore at 275MHz you have (275/300)* 180 = 141.4 GH/s

tzortz

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krfighter

newbie

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thanks for the guide. Works perfectly!

mstrongbow

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3D Printed!

Brilliant!

Littleshop

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Quote from: hchc on April 24, 2014, 09:10:59 PM

Do I need to do this to all 8 resistor on the antminer? (because there are eight identical section on each antminer).
Or just the R3 as in OP? My other 7 resistor is not label R3 but R33 R66 etc so I'm not sure. Thanks.

unfortunately all 8.

philipma1957

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Activity: 4158

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'The right to privacy matters'

Quote from: hchc on April 24, 2014, 09:10:59 PM

Do I need to do this to all 8 resistor on the antminer? (because there are eight identical section on each antminer).
Or just the R3 as in OP? My other 7 resistor is not label R3 but R33 R66 etc so I'm not sure. Thanks.

I meant to ask same question

hchc

hero member

Activity: 504

Merit: 500

Do I need to do this to all 8 resistor on the antminer? (because there are eight identical section on each antminer).
Or just the R3 as in OP? My other 7 resistor is not label R3 but R33 R66 etc so I'm not sure. Thanks.

Topic: [GUIDE] Undervolt antminer s1 [1.19W/GH at the wall] - page 17. (Read 69365 times)