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Author Topic: 2x500w vs 1x1000w PSU  (Read 187 times)
beachbummer
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November 11, 2017, 03:39:34 PM
 #1

A single 1000w psu is much more expensive than 2x500w psu.

Will there be any adverse effects on my mining rigs if I choose to use 2x500w psu?
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dagarair
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November 11, 2017, 03:41:39 PM
 #2

when presented with the option always go for the single. Stop being cheap.
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November 11, 2017, 03:49:46 PM
 #3

The problem with PSU's smaller than 750 W is they almost always don't have the PCI-E connectors or rail amperage you need to run multiple cards in a mining rig. BBT did a good presentation overview on PSU's for a mining rig.

https://youtu.be/ZEedQT0oGYw?t=396
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November 12, 2017, 06:24:14 AM
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Wattage is useless information ( just gives you direction). You should check how many amper could it deliver on 12v. P= U* I

Besides of that as it is mentioned in previous comments, usually "bigger" psu has more pci-e. For me its also important the lenght of cables.

The only benefit of dual psu, is cable management. You can put psus to both sides.

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beachbummer
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November 12, 2017, 08:38:58 AM
 #5

The problem with PSU's smaller than 750 W is they almost always don't have the PCI-E connectors or rail amperage you need to run multiple cards in a mining rig. BBT did a good presentation overview on PSU's for a mining rig.

https://youtu.be/ZEedQT0oGYw?t=396

Thanks. This video was quite good and was a useful reference.

The problem I have is that the Vega 56 requires 2x8 pin power connectors, and it seems like the PSUs will quickly run out of connectors.

Any advice on what I can do to avoid a tower of PSUs powering my Vega 56 rig? I currently have 2xVega 56 and they are being powered by the PSU powering the mobo as well, but I will have a problem when it comes to the third Vega...
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November 12, 2017, 08:51:56 AM
 #6

The problem with PSU's smaller than 750 W is they almost always don't have the PCI-E connectors or rail amperage you need to run multiple cards in a mining rig. BBT did a good presentation overview on PSU's for a mining rig.

https://youtu.be/ZEedQT0oGYw?t=396

Thanks. This video was quite good and was a useful reference.

The problem I have is that the Vega 56 requires 2x8 pin power connectors, and it seems like the PSUs will quickly run out of connectors.

Any advice on what I can do to avoid a tower of PSUs powering my Vega 56 rig? I currently have 2xVega 56 and they are being powered by the PSU powering the mobo as well, but I will have a problem when it comes to the third Vega...

A dual PSU setup with an ATX 750 W for the motherboard and risers and a larger server PSU with a PCI-E breakout board is an option. Larger server PSU's are usually 240V only though and are too loud if it's going to be in a living space.

https://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-ethereum-eth-zec-dash

I recently ordered one of these dual 120V 2400W PSU's for my ASRock H110 Pro BTC+ build and have been very happy with it.

http://www.panto-tech.com/products/206-110v-260v-power-supply-2400W-for-miner.html

It has 18 PCI-E 6+2 connectors that I use for the GPU VGA power inputs. It runs quiet and very cool as long as it's not run it at more than 50% of the capacity. When you run it at more than that, the fans get progressively louder the more wattage you pull from it. Shipping via DHL direct from the manufacturer was very quick. Total cost through PayPal was $181 shipped and I got it in less than 4 days.

The same manufacturer also has the same PSU with only the 18 PCI-E connectors and it's about $30 less, so I think that may be a better option for a dual PSU setup since I don't use the ATX 24-pin or sata/molex connectors on it.

http://www.panto-tech.com/products/207-110v-220v-power-supply-2400W-for-miner.html

BBT did a review of the PSU and has run it through various tests in his recent live streams and it's held up well. We'll see how it holds up long term, but for $150 shipped it's a good deal and solves the problem of not having enough PCI-E connectors for larger builds.

https://youtu.be/ZY2ouRWHgT8?t=300
beachbummer
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November 12, 2017, 09:10:55 AM
 #7

The problem with PSU's smaller than 750 W is they almost always don't have the PCI-E connectors or rail amperage you need to run multiple cards in a mining rig. BBT did a good presentation overview on PSU's for a mining rig.

https://youtu.be/ZEedQT0oGYw?t=396

Thanks. This video was quite good and was a useful reference.

The problem I have is that the Vega 56 requires 2x8 pin power connectors, and it seems like the PSUs will quickly run out of connectors.

Any advice on what I can do to avoid a tower of PSUs powering my Vega 56 rig? I currently have 2xVega 56 and they are being powered by the PSU powering the mobo as well, but I will have a problem when it comes to the third Vega...

A dual PSU setup with an ATX 750 W for the motherboard and risers and a larger server PSU with a PCI-E breakout board is an option. Larger server PSU's are usually 240V only though and are too loud if it's going to be in a living space.

https://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-ethereum-eth-zec-dash

I recently ordered one of these dual 120V 2400W PSU's for my ASRock H110 Pro BTC+ build and have been very happy with it.

http://www.panto-tech.com/products/206-110v-260v-power-supply-2400W-for-miner.html

It has 18 PCI-E 6+2 connectors that I use for the GPU VGA power inputs. It runs quiet and very cool as long as it's not run it at more than 50% of the capacity. When you run it at more than that, the fans get progressively louder the more wattage you pull from it. Shipping via DHL direct from the manufacturer was very quick. Total cost through PayPal was $181 shipped and I got it in less than 4 days.

The same manufacturer also has the same PSU with only the 18 PCI-E connectors and it's about $30 less, so I think that may be a better option for a dual PSU setup since I don't use the ATX 24-pin or sata/molex connectors on it.

http://www.panto-tech.com/products/207-110v-220v-power-supply-2400W-for-miner.html

BBT did a review of the PSU and has run it through various tests in his recent live streams and it's held up well. We'll see how it holds up long term, but for $150 shipped it's a good deal and solves the problem of not having enough PCI-E connectors for larger builds.

https://youtu.be/ZY2ouRWHgT8?t=300


This was very helpful. Thanks a lot!
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