Mining 120 vs 240 Volts on a 7 GPU RX 470 Rig

[Miner_Maker]

Hey there! I know a big question out there some folks had is what is the best voltage to mine at?

120 or 240?
I addressed some of these questions in a video here.

https://www.youtube.com/watch?v=AzMPDXBK8Ks&t

Hope this was helpful! If you're interested in this miner check out minermaker.com

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[64dimensions]

1) Google your power supply. It has been stated by others that for almost all major power supplies, 240 is more efficient that 120.

2) Ohm's law on your power cord: The resistance of your power cord is R which is the same for both 120 and 240. Power loss in your power cord is I x I x R, (I is the current). At 240V the current is about half what it is at 120V, so your power cord loss while small is 1/4 what it is @ 120 volts.

One other practical note, if you already have 120 and must spend money to use 240, then most likely the energy savings won't pay for the electrical work. Most people move to 240 to increase capacity.

[QuintLeo]

As a general rule of thumb, most Gold rated power supplies are about 2% more efficient when running on 220VAC input vs 110 VAC input.

 ALL of them are more efficient, the amount of the gain varies a bit (bigger tend to gain a little more).


 The loss in the power cord it minimal either way if it is sized properly for the amperage.
 Loss in the wiring TO the outlet will also be minimal, but probably more than the cord loss as it's usually a much longer run.

[fr4nkthetank]

PSU's mostly can run on 220v. its not a big difference to be honest, a few % better.  the main thing would be how much you can run !  If you have 100amps in your home, and you run 110v, then with lets say 15a you can have 1440watts running safely.  On 220v, you can have 15a running 2800watts.  of course this takes more space in your breaker box.  these calculations are off the top of my head, so do them yourself, but dont put more than 80% load on continuous power, and keep everything within building codes.

[nerdralph]

Newbie posting old, widely-known information as a ploy to drive traffic to his website and youtube channel.  This borders on spam.

[Wargika]

If you have choice, use the 240V. It is about 2% more efficient.

[fr4nkthetank]

If you have choice, use the 240V. It is about 2% more efficient.

give the guy a break, its a new channel.  has like 126 views.

[IOTUSA]

The main gain for most miners that run more than just a few rigs isn't even the PSU efficiency but rather the power factor. If you have 200 AMP and pull 120v single phase out of it you end up with approx 24000W of useable power (using a 0.8 power factor to not trip breakers and endanger anything).

If you run 200 amp, 3 phase 240v you get over 65000W of useable power with same power factor.

It's a huge difference for any installation when it comes to how many AMPS you need to pull to your spot. On average you get almost 1.8x the useable wattage running 3-phase 240 and dropping it to 208 using PDU's over running straight 120v single phase.

On top of that you get 2-4% efficiency out of PSU etc.

Edit: Expanding on frankthetank's argument with some real world numbers.

[toptek]

I used to run miners on a 110 line till i had a new main box put in about two years ago for 800 bucks with 34 slots which has about 7 slots left open if i ever decide to go all out in a year which is the plan with a 220 line that cost another 45 bucks on top of the 800 on a 200 amp service that was the best thing i ever did. so in my case, it was so I could use what I have better and safer the box i replaced was old and needed to be replaced so also in my case it was worth it.