Actual Sizing for BitMainTech Antminer S3:
Above we did a conservative calculation for S3. We are looking into it again.
The below is the tech specifications of Antminer S3. This 340 is at wall in a highly efficient psu.
So for in our calculation we may not need to give the 25% margin of safety.
We can assume the efficiency the company says is 90-95% and so the actual at PSU power consumption can be calculated as 340W*95% = 323W.
Then we go to the steps in the above post,
323W + 323W*25% = =403.75. So, 404W is our safe calculation for S3 at Stock clock of 218.75Mhz.
404W/12V = Roughly 32 to 35A can be considered depending on availability.
We here calculated the max power requirement. Now we will go to the sizing of PSU.
Specifications of Antminer S3:
https://drive.google.com/file/d/0B2k0Gc4r98pzRzZSZUV6WllkeHM/edit?usp=sharing
We are taking Corsair Power Supply CX 500
Specifications of Corsair Power Supply CX 500:
http://www.corsair.com/en-in/cx500-80-plus-bronze-certified-power-supply
Price is $30 after rebate card. http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027
Above 82%@110V and 85%@220V efficiency at full load.
Fan Noice ~35bB at full load.
Two PCI-E(6+2 Pin) Power Cables.
This power supply have a +12V Rail capable of handling upto 38A and so we can load upto 456W.
Which is more than enough for an S3 running at stock clock of 218.75Mhz.
If S3 is overclocked to 250Mhz to get 504Ghs speed, as it will roughly consume 390W as per manufacturer.
Then on our calculations like above,
390*95% = 351W at Psu level
Adding safety margin = 351 + 351*25% = Roughly 439Watts.
So even if the S3 is overclocked to 250Mhz this CX500 Power supply can easily handle the load..
Fo more than oneS3s or other DC Devices do your own calculations.
https://drive.google.com/file/d/0B2k0Gc4r98pzUXJFRHFmaGlvdUk/edit?usp=sharing
Above we did a conservative calculation for S3. We are looking into it again.
The below is the tech specifications of Antminer S3. This 340 is at wall in a highly efficient psu.
So for in our calculation we may not need to give the 25% margin of safety.
We can assume the efficiency the company says is 90-95% and so the actual at PSU power consumption can be calculated as 340W*95% = 323W.
Then we go to the steps in the above post,
323W + 323W*25% = =403.75. So, 404W is our safe calculation for S3 at Stock clock of 218.75Mhz.
404W/12V = Roughly 32 to 35A can be considered depending on availability.
We here calculated the max power requirement. Now we will go to the sizing of PSU.
Specifications of Antminer S3:
https://drive.google.com/file/d/0B2k0Gc4r98pzRzZSZUV6WllkeHM/edit?usp=sharing
We are taking Corsair Power Supply CX 500
Specifications of Corsair Power Supply CX 500:
http://www.corsair.com/en-in/cx500-80-plus-bronze-certified-power-supply
Price is $30 after rebate card. http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027
Above 82%@110V and 85%@220V efficiency at full load.
Fan Noice ~35bB at full load.
Two PCI-E(6+2 Pin) Power Cables.
This power supply have a +12V Rail capable of handling upto 38A and so we can load upto 456W.
Which is more than enough for an S3 running at stock clock of 218.75Mhz.
If S3 is overclocked to 250Mhz to get 504Ghs speed, as it will roughly consume 390W as per manufacturer.
Then on our calculations like above,
390*95% = 351W at Psu level
Adding safety margin = 351 + 351*25% = Roughly 439Watts.
So even if the S3 is overclocked to 250Mhz this CX500 Power supply can easily handle the load..
Fo more than oneS3s or other DC Devices do your own calculations.
https://drive.google.com/file/d/0B2k0Gc4r98pzUXJFRHFmaGlvdUk/edit?usp=sharing