How can i calculate what PSU i need?

[Oper92]

How can i calculate what PSU i need in order to run my entire rig? What should i consider in order to find the right one? and how to be sure that the result will be scalable?

I've a very low bugdet, so i would like to start with just 1 GPU and then add the others as soon as i make some profit.


What PSU should i consider for 1x rx 580? or 1x gtx 1080?
If i buy a PSU with more watt than i need, does it consume more or just take "what it needs"?
This are very noob question, hope you can help me.. Thanks

[CryptoWatcher420]

How can i calculate what PSU i need in order to run my entire rig? What should i consider in order to find the right one? and how to be sure that the result will be scalable?

I've a very low bugdet, so i would like to start with just 1 GPU and then add the others as soon as i make some profit.


What PSU should i consider for 1x rx 580? or 1x gtx 1080?
If i buy a PSU with more watt than i need, does it consume more or just take "what it needs"?
This are very noob question, hope you can help me.. Thanks

research, nuff said

[Oper92]

How can i calculate what PSU i need in order to run my entire rig? What should i consider in order to find the right one? and how to be sure that the result will be scalable?

I've a very low bugdet, so i would like to start with just 1 GPU and then add the others as soon as i make some profit.


What PSU should i consider for 1x rx 580? or 1x gtx 1080?
If i buy a PSU with more watt than i need, does it consume more or just take "what it needs"?
This are very noob question, hope you can help me.. Thanks

research, nuff said

Yes, i did.
If i search i find the result "as is", i would like to know the reasoning or a formula that would help me to be autonomous.

[Undefined31415]

You definitely want to overbudget when you're looking at PSU ratings, especially for 24/7 mining. Running a PSU 24/7 close to its maximum is asking for trouble.

In general, you don't want to exceed about 70-80% of the PSU's rated capabilities. Buying a PSU capable of delivering more power does not cause you to use more power, but do note that most PSUs reach optimal efficiency if they're loaded somewhere around 50% of the rating. (For a better 80+ PSUs, this becomes less noticeable.)

Add up the TDP of the CPU and all of your graphics cards, under the assumption that you don't have an unusually high number of drives or fans. Then multiply the sum by 1.25-1.4 (subjective), and you have a rough estimate of what you're looking for (generally round up to the nearest typical PSU rating, but you could round down if the difference is small enough). You can usually get by with less, especially if you mess with clock & power settings, but that's for you to play around with.


Also check for the number of connectors, particularly PCIe 6-pin or 8-pin connectors. These are necessary for powerful cards in a multi-GPU system.

Look for PSUs with the guts manufactured by Seasonic, SuperFlower, FSP, Delta, or another reputable manufacturer. Most upper-end units from brands such as EVGA are made by one of these.

Those made by HEC, CWT, Sirfa/Sirtec are lower on the totem pole, but *usually* do okay. CWT especially has gotten better since they partnered with Corsair a few years back. However, for heavy 24/7 loads, I usually look for the OEMs in the above tier.

Those made by unknown OEMs should generally be avoided. Perhaps they'll be okay, or they'll fail. Worst case involves a crappy PSU damaging your other components.

[flip4flop]

You can use this website to enter everything you need to run your rig and what PSU you should get to be handle it.  Remember to try and keep it up the 80% load rule if you are running it 24/7

https://outervision.com/power-supply-calculator

[vuli]

you can check what TDP each major component have, cpu, gpu. 1x gpu 200W, 1x cpu 100W, + ~100W for hdd and that stuff, = 400W. You buy 500W quality psu, so you have some reserve and so on....

[Oper92]

You definitely want to overbudget when you're looking at PSU ratings, especially for 24/7 mining. Running a PSU 24/7 close to its maximum is asking for trouble.

In general, you don't want to exceed about 70-80% of the PSU's rated capabilities. Buying a PSU capable of delivering more power does not cause you to use more power, but do note that most PSUs reach optimal efficiency if they're loaded somewhere around 50% of the rating. (For a better 80+ PSUs, this becomes less noticeable.)

Add up the TDP of the CPU and all of your graphics cards, under the assumption that you don't have an unusually high number of drives or fans. Then multiply the sum by 1.25-1.4 (subjective), and you have a rough estimate of what you're looking for (generally round up to the nearest typical PSU rating, but you could round down if the difference is small enough). You can usually get by with less, especially if you mess with clock & power settings, but that's for you to play around with.


Also check for the number of connectors, particularly PCIe 6-pin or 8-pin connectors. These are necessary for powerful cards in a multi-GPU system.

Look for PSUs with the guts manufactured by Seasonic, SuperFlower, FSP, Delta, or another reputable manufacturer. Most upper-end units from brands such as EVGA are made by one of these.

Those made by HEC, CWT, Sirfa/Sirtec are lower on the totem pole, but *usually* do okay. CWT especially has gotten better since they partnered with Corsair a few years back. However, for heavy 24/7 loads, I usually look for the OEMs in the above tier.

Those made by unknown OEMs should generally be avoided. Perhaps they'll be okay, or they'll fail. Worst case involves a crappy PSU damaging your other components.

Thanks man ! This seems pretty clear.
So, Assuming i've this configuration:

Mobo: H81 Pro BTC v2.0
CPU: Intel G1840
RAM: 1x4gb
GPU: 1x Sapphire Radeon RX 580 8GB GDDR5 PULSE

Intel G1840 has a TDP of 53W.
Sapphire Radeon RX 580 8GB GDDR5 PULSE has a TDP of 185.

I sum up: 238, then multiply per 1.4 = 333.2

1) If i decide to buy a 500W PSU than 70% (500*70/100) this will result in 350W so 20W of margin from estimations
2) If i decide to buy a 450W PSU than 70% (450*70/100) this will result in 315W so -16.2W from estimations.

While 2) should be good too, 1) for sure good. So the PSU should be greater than 500W.
According to amazon the best option is Corsair 550W at 44€ shipped

This comes with the cable needed for Radeon RX 580 8GB GDDR5 PULSE that is 1x8pin and my psu has 2 of it, So OK
This is it.. right? Thanks again for your patience

[Undefined31415]

You definitely want to overbudget when you're looking at PSU ratings, especially for 24/7 mining. Running a PSU 24/7 close to its maximum is asking for trouble.

In general, you don't want to exceed about 70-80% of the PSU's rated capabilities. Buying a PSU capable of delivering more power does not cause you to use more power, but do note that most PSUs reach optimal efficiency if they're loaded somewhere around 50% of the rating. (For a better 80+ PSUs, this becomes less noticeable.)

Add up the TDP of the CPU and all of your graphics cards, under the assumption that you don't have an unusually high number of drives or fans. Then multiply the sum by 1.25-1.4 (subjective), and you have a rough estimate of what you're looking for (generally round up to the nearest typical PSU rating, but you could round down if the difference is small enough). You can usually get by with less, especially if you mess with clock & power settings, but that's for you to play around with.


Also check for the number of connectors, particularly PCIe 6-pin or 8-pin connectors. These are necessary for powerful cards in a multi-GPU system.

Look for PSUs with the guts manufactured by Seasonic, SuperFlower, FSP, Delta, or another reputable manufacturer. Most upper-end units from brands such as EVGA are made by one of these.

Those made by HEC, CWT, Sirfa/Sirtec are lower on the totem pole, but *usually* do okay. CWT especially has gotten better since they partnered with Corsair a few years back. However, for heavy 24/7 loads, I usually look for the OEMs in the above tier.

Those made by unknown OEMs should generally be avoided. Perhaps they'll be okay, or they'll fail. Worst case involves a crappy PSU damaging your other components.

Thanks man ! This seems pretty clear.
So, Assuming i've this configuration:

Mobo: H81 Pro BTC v2.0
CPU: Intel G1840
RAM: 1x4gb
GPU: 1x Sapphire Radeon RX 580 8GB GDDR5 PULSE

Intel G1840 has a TDP of 53W.
Sapphire Radeon RX 580 8GB GDDR5 PULSE has a TDP of 185.

I sum up: 238, then multiply per 1.4 = 333.2

1) If i decide to buy a 500W PSU than 70% (500*70/100) this will result in 350W so 20W of margin from estimations
2) If i decide to buy a 450W PSU than 70% (450*70/100) this will result in 315W so -16.2W from estimations.

While 2) should be good too, 1) for sure good. So the PSU should be greater than 500W.
According to amazon the best option is Corsair 550W at 44€ shipped

This comes with the cable needed for Radeon RX 580 8GB GDDR5 PULSE that is 1x8pin and my psu has 2 of it, So OK
This is it.. right? Thanks again for your patience

If you're certain that you're going to expand, then it may be worth considering higher-end PSUs, at least beyond 500W. For example, it's usually the case that up until around 850W, bigger PSUs give you more watts per dollar. (Over 850-1000W ish, the prices start increasing more rapidly than capacity, which makes 2x PSUs worth considering)

[Oper92]

You definitely want to overbudget when you're looking at PSU ratings, especially for 24/7 mining. Running a PSU 24/7 close to its maximum is asking for trouble.

In general, you don't want to exceed about 70-80% of the PSU's rated capabilities. Buying a PSU capable of delivering more power does not cause you to use more power, but do note that most PSUs reach optimal efficiency if they're loaded somewhere around 50% of the rating. (For a better 80+ PSUs, this becomes less noticeable.)

Add up the TDP of the CPU and all of your graphics cards, under the assumption that you don't have an unusually high number of drives or fans. Then multiply the sum by 1.25-1.4 (subjective), and you have a rough estimate of what you're looking for (generally round up to the nearest typical PSU rating, but you could round down if the difference is small enough). You can usually get by with less, especially if you mess with clock & power settings, but that's for you to play around with.


Also check for the number of connectors, particularly PCIe 6-pin or 8-pin connectors. These are necessary for powerful cards in a multi-GPU system.

Look for PSUs with the guts manufactured by Seasonic, SuperFlower, FSP, Delta, or another reputable manufacturer. Most upper-end units from brands such as EVGA are made by one of these.

Those made by HEC, CWT, Sirfa/Sirtec are lower on the totem pole, but *usually* do okay. CWT especially has gotten better since they partnered with Corsair a few years back. However, for heavy 24/7 loads, I usually look for the OEMs in the above tier.

Those made by unknown OEMs should generally be avoided. Perhaps they'll be okay, or they'll fail. Worst case involves a crappy PSU damaging your other components.

Thanks man ! This seems pretty clear.
So, Assuming i've this configuration:

Mobo: H81 Pro BTC v2.0
CPU: Intel G1840
RAM: 1x4gb
GPU: 1x Sapphire Radeon RX 580 8GB GDDR5 PULSE

Intel G1840 has a TDP of 53W.
Sapphire Radeon RX 580 8GB GDDR5 PULSE has a TDP of 185.

I sum up: 238, then multiply per 1.4 = 333.2

1) If i decide to buy a 500W PSU than 70% (500*70/100) this will result in 350W so 20W of margin from estimations
2) If i decide to buy a 450W PSU than 70% (450*70/100) this will result in 315W so -16.2W from estimations.

While 2) should be good too, 1) for sure good. So the PSU should be greater than 500W.
According to amazon the best option is Corsair 550W at 44€ shipped

This comes with the cable needed for Radeon RX 580 8GB GDDR5 PULSE that is 1x8pin and my psu has 2 of it, So OK
This is it.. right? Thanks again for your patience

If you're certain that you're going to expand, then it may be worth considering higher-end PSUs, at least beyond 500W. For example, it's usually the case that up until around 850W, bigger PSUs give you more watts per dollar. (Over 850-1000W ish, the prices start increasing more rapidly than capacity, which makes 2x PSUs worth considering)

Clear! Thank you!

[Rasanders22]

You definitely want to overbudget when you're looking at PSU ratings, especially for 24/7 mining. Running a PSU 24/7 close to its maximum is asking for trouble.

In general, you don't want to exceed about 70-80% of the PSU's rated capabilities. Buying a PSU capable of delivering more power does not cause you to use more power, but do note that most PSUs reach optimal efficiency if they're loaded somewhere around 50% of the rating. (For a better 80+ PSUs, this becomes less noticeable.)

Add up the TDP of the CPU and all of your graphics cards, under the assumption that you don't have an unusually high number of drives or fans. Then multiply the sum by 1.25-1.4 (subjective), and you have a rough estimate of what you're looking for (generally round up to the nearest typical PSU rating, but you could round down if the difference is small enough). You can usually get by with less, especially if you mess with clock & power settings, but that's for you to play around with.


Also check for the number of connectors, particularly PCIe 6-pin or 8-pin connectors. These are necessary for powerful cards in a multi-GPU system.

Look for PSUs with the guts manufactured by Seasonic, SuperFlower, FSP, Delta, or another reputable manufacturer. Most upper-end units from brands such as EVGA are made by one of these.

Those made by HEC, CWT, Sirfa/Sirtec are lower on the totem pole, but *usually* do okay. CWT especially has gotten better since they partnered with Corsair a few years back. However, for heavy 24/7 loads, I usually look for the OEMs in the above tier.

Those made by unknown OEMs should generally be avoided. Perhaps they'll be okay, or they'll fail. Worst case involves a crappy PSU damaging your other components.

Thanks man ! This seems pretty clear.
So, Assuming i've this configuration:

Mobo: H81 Pro BTC v2.0
CPU: Intel G1840
RAM: 1x4gb
GPU: 1x Sapphire Radeon RX 580 8GB GDDR5 PULSE

Intel G1840 has a TDP of 53W.
Sapphire Radeon RX 580 8GB GDDR5 PULSE has a TDP of 185.

I sum up: 238, then multiply per 1.4 = 333.2

1) If i decide to buy a 500W PSU than 70% (500*70/100) this will result in 350W so 20W of margin from estimations
2) If i decide to buy a 450W PSU than 70% (450*70/100) this will result in 315W so -16.2W from estimations.

While 2) should be good too, 1) for sure good. So the PSU should be greater than 500W.
According to amazon the best option is Corsair 550W at 44€ shipped

This comes with the cable needed for Radeon RX 580 8GB GDDR5 PULSE that is 1x8pin and my psu has 2 of it, So OK
This is it.. right? Thanks again for your patience

If you're certain that you're going to expand, then it may be worth considering higher-end PSUs, at least beyond 500W. For example, it's usually the case that up until around 850W, bigger PSUs give you more watts per dollar. (Over 850-1000W ish, the prices start increasing more rapidly than capacity, which makes 2x PSUs worth considering)

Make sure to ground the PSU cases to eachother..

[Oper92]

You definitely want to overbudget when you're looking at PSU ratings, especially for 24/7 mining. Running a PSU 24/7 close to its maximum is asking for trouble.

In general, you don't want to exceed about 70-80% of the PSU's rated capabilities. Buying a PSU capable of delivering more power does not cause you to use more power, but do note that most PSUs reach optimal efficiency if they're loaded somewhere around 50% of the rating. (For a better 80+ PSUs, this becomes less noticeable.)

Add up the TDP of the CPU and all of your graphics cards, under the assumption that you don't have an unusually high number of drives or fans. Then multiply the sum by 1.25-1.4 (subjective), and you have a rough estimate of what you're looking for (generally round up to the nearest typical PSU rating, but you could round down if the difference is small enough). You can usually get by with less, especially if you mess with clock & power settings, but that's for you to play around with.


Also check for the number of connectors, particularly PCIe 6-pin or 8-pin connectors. These are necessary for powerful cards in a multi-GPU system.

Look for PSUs with the guts manufactured by Seasonic, SuperFlower, FSP, Delta, or another reputable manufacturer. Most upper-end units from brands such as EVGA are made by one of these.

Those made by HEC, CWT, Sirfa/Sirtec are lower on the totem pole, but *usually* do okay. CWT especially has gotten better since they partnered with Corsair a few years back. However, for heavy 24/7 loads, I usually look for the OEMs in the above tier.

Those made by unknown OEMs should generally be avoided. Perhaps they'll be okay, or they'll fail. Worst case involves a crappy PSU damaging your other components.

Thanks man ! This seems pretty clear.
So, Assuming i've this configuration:

Mobo: H81 Pro BTC v2.0
CPU: Intel G1840
RAM: 1x4gb
GPU: 1x Sapphire Radeon RX 580 8GB GDDR5 PULSE

Intel G1840 has a TDP of 53W.
Sapphire Radeon RX 580 8GB GDDR5 PULSE has a TDP of 185.

I sum up: 238, then multiply per 1.4 = 333.2

1) If i decide to buy a 500W PSU than 70% (500*70/100) this will result in 350W so 20W of margin from estimations
2) If i decide to buy a 450W PSU than 70% (450*70/100) this will result in 315W so -16.2W from estimations.

While 2) should be good too, 1) for sure good. So the PSU should be greater than 500W.
According to amazon the best option is Corsair 550W at 44€ shipped

This comes with the cable needed for Radeon RX 580 8GB GDDR5 PULSE that is 1x8pin and my psu has 2 of it, So OK
This is it.. right? Thanks again for your patience

If you're certain that you're going to expand, then it may be worth considering higher-end PSUs, at least beyond 500W. For example, it's usually the case that up until around 850W, bigger PSUs give you more watts per dollar. (Over 850-1000W ish, the prices start increasing more rapidly than capacity, which makes 2x PSUs worth considering)

Make sure to ground the PSU cases to eachother..

How this should be done?

[Wotan Wipeout]

Buy a good 1200 Watt PSU!
You will need it!

I didnt read all but as a CPU with lots GPUs a 6100T might be good. With passive cooling.
Mainboard H110 with lots 1060 3 GB could be perfect for you.