PSU Wattage for RTX 3070 + RTX 2070 Super

[milesuy]

I am planning to add a RTX 3070 GPU and run folding@home or coin mining on both GPUs.

 

My current system specs are the following:

CPU: Ryzen 7 2700X
Motherboard: Gigabyte X470 Aorus Gaming Wifi
RAM: Crucial Ballistix Sport AT 32GB 2666MHz
HDD: 2x Seagate BarraCuda 2TB
SSD: Samsung 860 Evo 500GB (SATA) & Team T-FORCE Delta Max 1TB (SATA) & Adata SX8200 (NVME)
GPU: Colorful iGame GeForce RTX 2070 Advanced OC-V
PSU: SeaSonic FOCUS Plus Gold 750W 80+ Gold
Fans: 3x RGB 120mm Fans & 3x Phanteks 140mm Fans

 

I still haven't decide yet, but I am planning to set it up in these ways:

- 1 GPU Folding@Home, 1 GPU mining, CPU mining

- 2 GPU Folding@Home, CPU mining

- 1 GPU Folding@Home, 1 GPU mining, CPU idle

- 2 GPU Folding@Home, CPU idle

 

Questions:

• Is the PSU (750W 80+ Gold) enough to for the 2 GPUs (RTX 2070 Super and RTX 3070) or do I need to upgrade? If I need to upgrade, at least how much wattage would you recommend?
• I used PC Part Picker to measure the wattage, but it does not let me add 2 different GPUs, only identical GPUs with SLI support. What websites can I use to measure the wattage / required PSU?
• In PC Part Picker, I tried to only add 1 of the GPUs and the estimated wattage of the GPUs are 215W and 220W for the RTX 2070 Super and RTX 3070, respectively. Then, according to PC Part Picker the estimated wattage of my system without the GPUs is 278W, so adding the wattages (278W + 215W + 220W) is 713W. Does this mean my PSU is good since the estimated wattage is 713W, which is less than 750W?
• I also checked FSP's calculator and they recommend at least 707W, if I entered 2x RTX 3070, does this mean my PSU is good enough? (Link to FSP's calculator: Click me)

[Carbonado]

7 minutes ago, milesuy said:

What websites can I use to measure the wattage / required PSU?

bequiet wattage calculator or seasonic wattage calculator

[Carbonado]

7 minutes ago, milesuy said:

Does this mean my PSU is good since the estimated wattage is 713W, which is less than 750W?

I will not recommend it, as the gpu's can spike you should always have at least 100w-150w of headroom on your psu

 

[Carbonado]

10 minutes ago, milesuy said:

713W

Did you take on all the other components into account?

This is what i get with ALL your componenets added

[milesuy]

1 minute ago, Carbonado said:

Did you take on all the other components into account?

This is what i get with ALL your componenets added

I listed all the components installed on my PC:

CPU: Ryzen 7 2700X
Motherboard: Gigabyte X470 Aorus Gaming Wifi
RAM: Crucial Ballistix Sport AT 32GB 2666MHz
HDD: 2x Seagate BarraCuda 2TB
SSD: Samsung 860 Evo 500GB (SATA) & Team T-FORCE Delta Max 1TB (SATA) & Adata SX8200 (NVME)
GPU: Colorful iGame GeForce RTX 2070 Advanced OC-V
PSU: SeaSonic FOCUS Plus Gold 750W 80+ Gold
Fans: 3x RGB 120mm Fans & 3x Phanteks 140mm Fans

 

5 minutes ago, Carbonado said:

I will not recommend it, as the gpu's can spike you should always have at least 100w-150w of headroom on your psu

 

As mentioned by dark power, the PSU has to be at least 826W so do I need to at least a 1000W PSU?

 

Is it possible to use a 2nd PSU instead (i.e. 500W), then use a jumper to turn on the 2nd PSU? So it would be a 750W PSU + another PSU for the GPU

[Elisis]

20 minutes ago, milesuy said:

Is the PSU (750W 80+ Gold) enough to for the 2 GPUs (RTX 2070 Super and RTX 3070) or do I need to upgrade? If I need to upgrade, at least how much wattage would you recommend?

It might be enough. 2070S uses like 250W under load and 3070 similar, though Ampere and Seasonic is.... not great. Can't hurt to try running those specs on the PSU, though.

 

20 minutes ago, milesuy said:

I also checked FSP's calculator and they recommend at least 707W, if I entered 2x RTX 3070, does this mean my PSU is good enough? (Link to FSP's calculator: Click me)

PSU calculators are garbage. Don't use them.

[milesuy]

4 minutes ago, Elisis said:

It might be enough. 2070S uses like 250W under load and 3070 similar, though Ampere and Seasonic is.... not great. Can't hurt to try running those specs on the PSU, though.

Will it damage any of my components or PSU if I try testing them and I went over my PSU's wattage?

[Elisis]

2 minutes ago, milesuy said:

Will it damage any of my components or PSU if I try testing them and I went over my PSU's wattage?

no. There are protections for a reason.

[milesuy]

 

1 hour ago, Carbonado said:

 

1 hour ago, milesuy said:

As mentioned by dark power, the PSU has to be at least 826W so do I need to at least a 1000W PSU?

 I always have Seasonic PSUs for my PCs, but I would like to try other brands.

 

I found a Gigabyte 1000W GP-P1000GM on sale, is it a good buy or a bad idea, since GamersNexus said that some Gigabyte 750W and 850W PSUs blows up and damages components. Although they did not mention 1000W models.

Source: 

 

I also found FSP Hydro G Pro 1000W, is FSP good?

 

 

1 hour ago, Elisis said:

though Ampere and Seasonic is.... not great

What is the problem with Seasonic?

[Carbonado]

29 minutes ago, milesuy said:

bad idea

BAD bad idea

[Carbonado]

32 minutes ago, milesuy said:

I also found FSP Hydro G Pro 1000W, is FSP good?

You can check if it is recommended in the PSU tier list 

 

Seems like it is recommended, so you can go for it, but check YT reviews for it too before buying it!