3x S3 on a DPS-1200 at 120v?

[Witrebel]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

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[VirosaGITS]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

No problem whatsoever for the PSU. But the circuit can't handle it, or i would but at "overload", over the 80% continuous load rating. Since 120v * 20a = 2400 * 0.8 = 1920 at the wall continuous load limit. Assuming you actually get 120v.

You can do it and its probably not dangerous. But if you want to stay under the 1920watt at the wall limit, you would not have to underclock a whole lot since 6 S3 could pull something like 2130watts, or you could run 5 S3 on it and forget about it.

[Prelude]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available.

[VirosaGITS]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available.

My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck.

[Prelude]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available.

My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck.

I don't know how he's clocking them, but going from memory 250MHz pulled about 400W DC. If that's how he's running them, I wouldn't do more than 2 per PSU on 120V.

[VirosaGITS]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available.

My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck.

I don't know how he's clocking them, but going from memory 250MHz pulled about 400W DC. If that's how he's running them, I wouldn't do more than 2 per PSU on 120V.

I doubt that, my S3 consumed 350 watts at the wall sligthly overclocked on G2 EVGA's, so that would be about 315W DC, i doubt you could even overclock a S3 to 400W DC without overvolting them somehow.

So stock -1 or -2 clock steps should easily be under 300W DC.

[Prelude]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available.

My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck.

I don't know how he's clocking them, but going from memory 250MHz pulled about 400W DC. If that's how he's running them, I wouldn't do more than 2 per PSU on 120V.

I doubt that, my S3 consumed 350 watts at the wall sligthly overclocked on G2 EVGA's, so that would be about 315W DC, i doubt you could even overclock a S3 to 400W DC without overvolting them somehow.

So stock -1 or -2 clock steps should easily be under 300W DC.

You're probably right, it's been a while since I measured them. I still have 2 heating the basement, I'll try to get a measurement sometime today.

[VirosaGITS]

Waiting for an electrician to run 220v subpanel in my mining location.  Currently all I have available and unpopulated is a 20a 120v circuit.  I'd like to run 2xDPS-1200 on it, each powering 3xS3, but I know that may be pushing the PSU a bit hard given 120v input.  Have any of you ran something similar?

The PSU is only rated for 900w @ 120V. You need 240V to pull 1200w from it. Stick to 2x S3 per PSU until you have 240V available.

My bad, i did not properly do my homework on the DPS-1200FB. But if they can do 900w DC, then he would probably be okay still, since 340W at the wall means pretty much 300W DC. Maybe a one or two step underclock would be in order to not push your luck.

I don't know how he's clocking them, but going from memory 250MHz pulled about 400W DC. If that's how he's running them, I wouldn't do more than 2 per PSU on 120V.

I doubt that, my S3 consumed 350 watts at the wall sligthly overclocked on G2 EVGA's, so that would be about 315W DC, i doubt you could even overclock a S3 to 400W DC without overvolting them somehow.

So stock -1 or -2 clock steps should easily be under 300W DC.

You're probably right, it's been a while since I measured them. I still have 2 heating the basement, I'll try to get a measurement sometime today.

Its not too mission critical  anyways. We both agree that 2 S3(per PSU) is safe both for the PSU and the circuit and that 3 S3 per PSU is pushing the PSU at least to its limit and the circuit as well.

So the rest is just extra information for OP to properly clock his 4 or 6 S3 if he want to make conservative use of his electronics or not.

[Witrebel]

Given that this is remotely managed and that I've seen the power sag significantly, sounds like im better off leaving them full clock and doing 2 per PSU untill I get my wiring squared away.  Thanks for the feedback!