Should I buy 3 Antminer S1's for $15?

[VirosaGITS]

Would a DPS1200 work for all three without underclocking and/or undervolting?

Not on 120v. But you *really* should downvolt them. The GH/s loss is minimal vs massive efficiency gain.

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[fharding]

Would a DPS1200 work for all three without underclocking and/or undervolting?

Not on 120v. But you *really* should downvolt them. The GH/s loss is minimal vs massive efficiency gain.

Is it easy? Is the downvolting just via this "pencil mod" I've been hearing about? And I have free power so does it even matter? Also if not 3 could I just power 2 with a DPS1200? Thanks.

[MyRig]

If your electrical outlet is over 208v, without any pencil mod, you can power up 3 S1 or 3 S3. 

If your electrical outlet is at 100-120v, you can power up 2 units.  if electricity is free, let the PSU be as is! 

Would a DPS1200 work for all three without underclocking and/or undervolting?

Not on 120v. But you *really* should downvolt them. The GH/s loss is minimal vs massive efficiency gain.

Is it easy? Is the downvolting just via this "pencil mod" I've been hearing about? And I have free power so does it even matter? Also if not 3 could I just power 2 with a DPS1200? Thanks.

[fharding]

If your electrical outlet is over 208v, without any pencil mod, you can power up 3 S1 or 3 S3. 

If your electrical outlet is at 100-120v, you can power up 2 units.  if electricity is free, let the PSU be as is! 

Would a DPS1200 work for all three without underclocking and/or undervolting?

Not on 120v. But you *really* should downvolt them. The GH/s loss is minimal vs massive efficiency gain.

Is it easy? Is the downvolting just via this "pencil mod" I've been hearing about? And I have free power so does it even matter? Also if not 3 could I just power 2 with a DPS1200? Thanks.

But with my 120v socket wouldn't I be able to run 3 undervolted antminers on that single DPS1200? Compared to just two normal ones?

[sidehack]

Depending on how far you undervolt them, you can run half a dozen on the DPS1200 on 120V. I had at one time 14 undervolted S1 running off a single 2KW PSU.

[fharding]

Depending on how far you undervolt them, you can run half a dozen on the DPS1200 on 120V. I had at one time 14 undervolted S1 running off a single 2KW PSU.

Okay good to know, current plan is to undervolt the S1's so I can run 3 off one DPS1200 at 120v. That's 300W each, do you have any idea what resistance I'd need for that?

[philipma1957]

Depending on how far you undervolt them, you can run half a dozen on the DPS1200 on 120V. I had at one time 14 undervolted S1 running off a single 2KW PSU.

Okay good to know, current plan is to undervolt the S1's so I can run 3 off one DPS1200 at 120v. That's 300W each, do you have any idea what resistance I'd need for that?

it is really easy and I will find a link

just shoot for 140gh per machine at 180 watts per machine

so 420gh total at 540 watts


all info is here :

https://bitcointalk.org/index.php?topic=526060.0

[fharding]

Depending on how far you undervolt them, you can run half a dozen on the DPS1200 on 120V. I had at one time 14 undervolted S1 running off a single 2KW PSU.

Okay good to know, current plan is to undervolt the S1's so I can run 3 off one DPS1200 at 120v. That's 300W each, do you have any idea what resistance I'd need for that?

it is really easy and I will find a link

just shoot for 140gh per machine at 180 watts per machine

so 420gh total at 540 watts


all info is here :

https://bitcointalk.org/index.php?topic=526060.0

This is awesome thank you. Nice to have the chart.

[philipma1957]

Depending on how far you undervolt them, you can run half a dozen on the DPS1200 on 120V. I had at one time 14 undervolted S1 running off a single 2KW PSU.

Okay good to know, current plan is to undervolt the S1's so I can run 3 off one DPS1200 at 120v. That's 300W each, do you have any idea what resistance I'd need for that?

it is really easy and I will find a link

just shoot for 140gh per machine at 180 watts per machine

so 420gh total at 540 watts


all info is here :

https://bitcointalk.org/index.php?topic=526060.0

This is awesome thank you. Nice to have the chart.

my first try I did with out meters two lite pressure stokes of a number 2 pencil  on the proper resisters.

do not press hard.

[sidehack]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

[philipma1957]

His benefit to do a bit of under volt underclock is more about noise and heat control.

Max setting is 600gh at 1200 watts.
Stock setting is 540gh at 1080  watts

If I was running the s-1 with a hps1200 psu using a 120 line

I would shoot for 600 watts.

The psu would not strain.

The under volt and down clock could be for 450 gh 600 watts.

He could run a fourth one if he can find one cheap.

He can set fans lower.

600 watts vs 1200 watts

That second 600 watts op you gains from 450 gh to 600 gh.

He could try solo mining BTC. OR PPC

Btc block is hard to do with 450gh but a PPC block worth 30$ is a lot easier to do.

[sidehack]

(if you care about altcoins)

[fharding]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

[philipma1957]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

yes  but  the mod  tends to make the sweet spot for the miners to be 130 gh to 160 gh

so 390 to 480gh    with  watts dropping from 1080 to    500-600   is more likely what you will get.

but heck since your cost was 10 bucks

400gh will earn 35 bucks before the ½ ing
450gh will earn 38 bucks before the ½ ing
500gh will earn 41 bucks before the ½ ing
550gh will earn 44 bucks before the ½ ing

[fharding]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

yes  but  the mod  tends to make the sweet spot for the miners to be 130 gh to 160 gh

so 390 to 480gh    with  watts dropping from 1080 to    500-600   is more likely what you will get.

but heck since your cost was 10 bucks

400gh will earn 35 bucks before the ½ ing
450gh will earn 38 bucks before the ½ ing
500gh will earn 41 bucks before the ½ ing
550gh will earn 44 bucks before the ½ ing

Is that if I mod all three? Sorry its a little confusing to read. I was planning on only modding one.

[VirosaGITS]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

yes  but  the mod  tends to make the sweet spot for the miners to be 130 gh to 160 gh

so 390 to 480gh    with  watts dropping from 1080 to    500-600   is more likely what you will get.

but heck since your cost was 10 bucks

400gh will earn 35 bucks before the ½ ing
450gh will earn 38 bucks before the ½ ing
500gh will earn 41 bucks before the ½ ing
550gh will earn 44 bucks before the ½ ing

Is that if I mod all three? Sorry its a little confusing to read. I was planning on only modding one.

I see you're still struggling with this. You should undervolt all of them, if only to a point where you only lose 10GH/s each. The efficiency will be much better, you wont overload your PSU and there will be less noise.

[fharding]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

yes  but  the mod  tends to make the sweet spot for the miners to be 130 gh to 160 gh

so 390 to 480gh    with  watts dropping from 1080 to    500-600   is more likely what you will get.

but heck since your cost was 10 bucks

400gh will earn 35 bucks before the ½ ing
450gh will earn 38 bucks before the ½ ing
500gh will earn 41 bucks before the ½ ing
550gh will earn 44 bucks before the ½ ing

Is that if I mod all three? Sorry its a little confusing to read. I was planning on only modding one.

I see you're still struggling with this. You should undervolt all of them, if only to a point where you only lose 10GH/s each. The efficiency will be much better, you wont overload your PSU and there will be less noise.

Yeah it's kind of overwhelming, it's my first time doing anything besides a USB Block Erupter. Thanks for the advice, I will see if I can undervolt just little enough to lose like 10 GH/s each.

Thanks everyone

[VirosaGITS]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

yes  but  the mod  tends to make the sweet spot for the miners to be 130 gh to 160 gh

so 390 to 480gh    with  watts dropping from 1080 to    500-600   is more likely what you will get.

but heck since your cost was 10 bucks

400gh will earn 35 bucks before the ½ ing
450gh will earn 38 bucks before the ½ ing
500gh will earn 41 bucks before the ½ ing
550gh will earn 44 bucks before the ½ ing

Is that if I mod all three? Sorry its a little confusing to read. I was planning on only modding one.

I see you're still struggling with this. You should undervolt all of them, if only to a point where you only lose 10GH/s each. The efficiency will be much better, you wont overload your PSU and there will be less noise.

Yeah it's kind of overwhelming, it's my first time doing anything besides a USB Block Erupter. Thanks for the advice, I will see if I can undervolt just little enough to lose like 10 GH/s.

Thanks everyone

Just a heads up to how i run my S1's now. At some point, when you have better miners. You only turn them on when you have spare power or need heat (I disabled all heating here). If you undervolt them far enough, you can use them as on-demand heater with no fans = 0 noise (depending on the PSU i guess).

[fharding]

If you want to read the results of my work on S1 undervolting, details can be found here: https://bitcointalk.org/index.php?topic=857967.0

Probably not as n00b-friendly a writeup but fairly technically extensive and gives numbers down to below 1W/GH board-level if you want to take it that far. With free power there's no real reason to unless you can't deal with the heat output.

Well my reasoning is 3 Antminer S1's = ~360W*3 = 1080W, and the PSU on 120v could only give me 1000W, so if I just pencil mod one of the three I should be able to power all of them with only one PSU and only ~40GH/s loss. Also heat should not be a problem even if I didn't undervolt, I'm going to have 2 fans on each rig. Also thank you very much for the writeup, I will be reading about this.

yes  but  the mod  tends to make the sweet spot for the miners to be 130 gh to 160 gh

so 390 to 480gh    with  watts dropping from 1080 to    500-600   is more likely what you will get.

but heck since your cost was 10 bucks

400gh will earn 35 bucks before the ½ ing
450gh will earn 38 bucks before the ½ ing
500gh will earn 41 bucks before the ½ ing
550gh will earn 44 bucks before the ½ ing

Is that if I mod all three? Sorry its a little confusing to read. I was planning on only modding one.

I see you're still struggling with this. You should undervolt all of them, if only to a point where you only lose 10GH/s each. The efficiency will be much better, you wont overload your PSU and there will be less noise.

Yeah it's kind of overwhelming, it's my first time doing anything besides a USB Block Erupter. Thanks for the advice, I will see if I can undervolt just little enough to lose like 10 GH/s.

Thanks everyone

Just a heads up to how i run my S1's now. At some point, when you have better miners. You only turn them on when you have spare power or need heat (I disabled all heating here). If you undervolt them far enough, you can use them as on-demand heater with no fans = 0 noise (depending on the PSU i guess).

Good to know, I'll probably turn them into heaters (like you said) or just sell them on eBay when I get a better miner.