Question Dual System Power Supply asking for help

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Knowix

Mar 27, 2021
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Hi guys!

I'm in the process of planning to build a Dual system pc for streaming and for playing. I have a kinda big problem with choosing the right psu solution. I'd be so happy if someone could help me.

So the following is a must in my pc.
1. 1 case with 2 motherboards
2. Single power supply
3. Able to run just one of the systems at a time
4. Should be smart instead of buying expensive stuff

So for the first one I already decided that I'll go with Phanteks enthoo pro 2 case it seems the cheapest case that have support for 2 motherboards. Since I will use two motherboards in that case I'm limited to one power supply. I found that Phantkes revolt X psu is made for dual systems. Just I don't want to use it since it's 400$ and also I saw a lot of people complaining about it(melting cables, fires) So i want to avoid that psu. I found the Phanteks power splitter and that would be the perfect option for me to use. Just I couldn't find anywhere to buy used or new. The last stock was in 2019. So that option is out as far as i can see If you know where can i get one let me know.
So how can I power two systems with one power supply while I'm able to switch one off and just run one system?

It came to my mind that might be the best option to have two power supplys at the back of the case. I didn't know if it fits or not. But I think for the streamer pc since it not using too much power 400W maybe the psu can be a passively cooled psu than it's easyer to put next to the other one. But this should be the last option.

Thanks for the help!

ui: sorry for my English I'm not a native speaker
 
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So basically you want two pc fit on one case and only run one of them at a time.
Although I do not know what’s wrong with having one pc but you can install more than one operating system in one pc, I think switch system would be more easier than what you are imaging.
 
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ying0410 said:
So basically you want two pc fit on one case and only run one of them at a time.
Although I do not know what’s wrong with having one pc but you can install more than one operating system in one pc, I think switch system would be more easier than what you are imaging.
Click to expand...
Playing on the gamer pc and streaming it from the dedicated pc
VM’s probably wont work
The problem with one pc is that streaming need lot of resources that cause laggs and not ideal for 144Hz gaming. So with a dedicated streaming Pc my gaming pc is less under load. But the question is how can i power two pc with a single psu?
 
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sonofjesse said:
What is the use case? I have no idea what your goals are?


Can't just use VM's?

I mean build one box with 128GB ram, 1000-1600 watt power supply and run your VM's?
Click to expand...
Goal is that have a dedicated gaming pc and a dedicated streaming pc. So when i stream i can fully enjoy the games and not worrying about that my gaming pc performance loss. And you can stream games on VM I believe.
 
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NightHawkRMX said:
This seems unnecessary as with a powerful enough pc a dedicated streaming is not needed.

Seems like a lot of money could be saved by doing a singular system.
Click to expand...
My gaming pc kinda powerful and not enough for 1080p 60fps stream. I mean for LOL is more than enough but for fps games is not. Also if i add webcam it’s even worse for all the games.
So if i want to play and stream in good quality it has to be done.

ui:my setup 3900x with 1080Ti
 
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ying0410 said:
So basically you want two pc fit on one case and only run one of them at a time.
Although I do not know what’s wrong with having one pc but you can install more than one operating system in one pc, I think switch system would be more easier than what you are imaging.
Click to expand...
Multiple PC's in one case are a thing. They are a very popular niche product. If you don't know about these, then perhaps it would be best to not reply to threads regarding them with comments like that. It just shows you don't have an understanding of the question, because if you did you might respond a bit differently knowing WHY they are common and that they ARE common, not just some "thing" that the OP made up themselves.

In most cases this would be a good example of first learning about what you are commenting on, before commenting, so that you will be better informed and won't post things that clearly show a lack of knowledge in that area of expertise. Just saying.
 
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Knowix said:
My gaming pc kinda powerful and not enough for 1080p 60fps stream. I mean for LOL is more than enough but for fps games is not. Also if i add webcam it’s even worse for all the games.
So if i want to play and stream in good quality it has to be done.

ui:my setup 3900x with 1080Ti
Click to expand...
Your system is FAR MORE than capable enough to do 1080p 60fps streaming. If you can't, then something ELSE is wrong. We were streaming 1080p 60fps back in 2015 with MUCH less capable hardware. In fact, you should be able to EASILY stream 60fps at 1080p with practically any moderately capable hardware configuration from the last two or three generations on both the CPU and GPU sides of things.
 
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For dual-system build, 1st you need to pick out is PC case. Once you have that, then we can go on with other components, including PSU.

Here are 10 best dual-system PC cases,
link: https://www.setupgamers.com/dual-system-pc-case/

Take your pick.

Knowix said:
Able to run just one of the systems at a time
Click to expand...

This is your biggest hurdle and here you have 3 choices:
  1. Use two PSUs.
  2. Use Phanteks Power splitter, specs: https://www.phanteks.com/PH-PWSPR.html
  3. Use Phanteks Revolt X PSU (it's the only PSU of it's kind currently in entire world). Though, you already stated that it costs too much for you. Then again, convenience costs money.
 
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I have one of these, feel free to ask...
dc4204c45a18f66bd0b00b0ee00c1071.jpg
 
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jtk2515 said:
Are you wanting to use nvenc or x264 ? Slow?
Just to make sure we are talking about 1080p@60fps 6000kb?
Click to expand...
yeah 1080p@60fps 6000kb.
It will be medium or slow depends on the game but slow is worts than medium so i guess i'll stick to medium most of the time. And yeah x264 encodeing
 
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Aeacus said:
For dual-system build, 1st you need to pick out is PC case. Once you have that, then we can go on with other components, including PSU.

Here are 10 best dual-system PC cases,
link: https://www.setupgamers.com/dual-system-pc-case/

Take your pick.



This is your biggest hurdle and here you have 3 choices:
  1. Use two PSUs.
  2. Use Phanteks Power splitter, specs: https://www.phanteks.com/PH-PWSPR.html
  3. Use Phanteks Revolt X PSU (it's the only PSU of it's kind currently in entire world). Though, you already stated that it costs too much for you. Then again, convenience costs money.
Click to expand...
I did hell of a lot research and my sulution will be to use a small factor second psu next to the big one in the back of the case same room as the other one. The space will be tight but It should fit 😀 And also will add gridds to the side panel and to the inside slope part of the case and will change the psu fan direction to push out hot air.

I will build it in the following months maybe wait a bit to go with full custume water cooling. I found the smaller revolt x psu the 850w one but it's out of stock everywhere. If it will be available might consider it since the 850w one is only 180$.
 
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Knowix said:
1. 1 case with 2 motherboards
2. Single power supply
3. Able to run just one of the systems at a time
Click to expand...

Yeah that's not gonna work unless you're in for some hardmodding...... the analog route would imply a couple of wires, transistors, switches... whereas the digital would involve an Arduino, a status screen with control buttons or a touch panel, that's what's coming to my mind rn

Why don't you get a capture card? I'm no expert in streaming but the El Gato HD60 PRO looks more than capable for streaming a game or movies.
 
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Knowix said:
yeah 1080p@60fps 6000kb.
It will be medium or slow depends on the game but slow is worts than medium so i guess I'll stick to medium most of the time. And yeah x264 encodeing
Click to expand...

I would just get a 5950x and put a 420mm Radiator on it. It will handle that load just fine. This is assuming your going to cap your FPS at 120fps. Also are you going to play at 1080p? or 1440p and downscaling?

Only problem is getting a 5950x. If you cannot find one around Msrp then going with the 2 PC build will be a better option. A 5900x would also be a Good option, you can look at some benchmarks of the 5900x using x264 slow and decide if the tradeoffs are worth it. As with the 5900x will run almost all games in 264 slow just fine, but you will have to tweak some settings for others. But I would recommend just streaming at 720p@60fps or 1080p@30fps @6000kb depending on the game or try turning off CBR. Another option is just upgrading your video card to a 3080 or 3090 and using nvenc.

But if you want the straight best settings x264 slow 1080p@60fps 6000-10,000kb cbr and your going to make the encoder rescale. Then I would get a 2nd PC.

Edit: Just read you have a 3900x. If using x264 medium the 3900x is fine just adjust some settings. If your using OBS you could go their and ask what settings to use. They are very knowledgeable and you can share a obs Diagnostic report https://obsproject.com/forum/list/windows-support.32/.
Few things that might help in x264 medium.

  1. Cap your in game FPS to 120 then stream at 60fps
  2. Run OBS in Admin
  3. Run the game in in 1080p and stream in 1080p
  4. Set your downscale filter to bilinear since your not downscaling.
  5. try out all those 1st if that does not help then Dont run CBR
 
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Jesus. I can run and stream at 60fps, with relatively high settings, on most titles, using a 6700k and RTX 2060 Super XC Ultra gaming graphics card, so I find it extremely hard to believe that you can't do it with a 3900x and a 1080 ti.

You have OTHER problems you need to sort out. There is absolutely no reason you should need a dedicated streaming PC to do this with that hardware at 1080p. Maybe if it was 1440p or 4k, but not at 1080p. Not even at max ultra settings.

My guess is, you have a poorly configured streaming application or some other setting or combination of settings in some other app or utility (Or Windows) is causing your issues.
 
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Darkbreeze said:
Jesus. I can run and stream at 60fps, with relatively high settings, on most titles, using a 6700k and RTX 2060 Super XC Ultra gaming graphics card, so I find it extremely hard to believe that you can't do it with a 3900x and a 1080 ti.

You have OTHER problems you need to sort out. There is absolutely no reason you should need a dedicated streaming PC to do this with that hardware at 1080p. Maybe if it was 1440p or 4k, but not at 1080p. Not even at max ultra settings.

My guess is, you have a poorly configured streaming application or some other setting or combination of settings in some other app or utility (Or Windows) is causing your issues.
Click to expand...

You are encoding using nvenc thou correct?
 
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Knowix said:
I found the smaller revolt x psu the 850w one
Click to expand...

That isn't Revolt X, instead it's Revolt Pro,
specs: https://www.phanteks.com/Revolt-Pro.html

Revolt X comes only in 2 confs, 1kW and 1.2kW,
specs: https://www.phanteks.com/Revolt-X.html

And Revolt Pro has completely different purpose than Revolt X.
Revolt X - able to power 2 builds at once
Revolt Pro - able to connect 2nd PSU to it, to increase max output, for 1 build

Essentially, Revolt Pro is like Phanteks Power Combo,
specs: https://www.phanteks.com/PH-PWCOB.html
Which allows using two PSUs to increase total output for 1 build.

Knowix said:
to use a small factor second psu next to the big one
Click to expand...

Sure, you can use ATX and SFX PSUs. Just get proper, good quality, PSUs.

Seasonic and Corsair offer top notch SFX PSUs and you can get ATX PSU from Seasonic as well (Focus or PRIME series). Though with Corsair ATX PSUs, you need to be careful since the cheaper end of those PSUs aren't that good. From Corsair, look towards HX, HXi, AX or AXi series. RMx and RMi are also good.

Seasonic, pcpp: https://pcpartpicker.com/products/compare/dCs8TW,cNsmP6,mPdxFT,rRFKHx/
Corsair, pcpp: https://pcpartpicker.com/products/compare/BJFPxr,CQ648d,79tQzy,BtsmP6/

Oh, all three of my PCs: Skylake, Haswell and AMD are also powered by Seasonic. Full specs with pics in my sig.
 
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Aeacus said:
That isn't Revolt X, instead it's Revolt Pro,
specs: https://www.phanteks.com/Revolt-Pro.html

Revolt X comes only in 2 confs, 1kW and 1.2kW,
specs: https://www.phanteks.com/Revolt-X.html

And Revolt Pro has completely different purpose than Revolt X.
Revolt X - able to power 2 builds at once
Revolt Pro - able to connect 2nd PSU to it, to increase max output, for 1 build

Essentially, Revolt Pro is like Phanteks Power Combo,
specs: https://www.phanteks.com/PH-PWCOB.html
Which allows using two PSUs to increase total output for 1 build.



Sure, you can use ATX and SFX PSUs. Just get proper, good quality, PSUs.

Seasonic and Corsair offer top notch SFX PSUs and you can get ATX PSU from Seasonic as well (Focus or PRIME series). Though with Corsair ATX PSUs, you need to be careful since the cheaper end of those PSUs aren't that good. From Corsair, look towards HX, HXi, AX or AXi series. RMx and RMi are also good.

Seasonic, pcpp: https://pcpartpicker.com/products/compare/dCs8TW,cNsmP6,mPdxFT,rRFKHx/
Corsair, pcpp: https://pcpartpicker.com/products/compare/BJFPxr,CQ648d,79tQzy,BtsmP6/

Oh, all three of my PCs: Skylake, Haswell and AMD are also powered by Seasonic. Full specs with pics in my sig.
Click to expand...
Thank you so much for correcting me! I totally misunderstand the revolt pro. What a mistake I made.

I found a be quiet! SFX psu for under 100$ (BE QUIET! SFX Power 2 300W)

Would you recommend it?
 
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jtk2515 said:
I would just get a 5950x and put a 420mm Radiator on it. It will handle that load just fine. This is assuming your going to cap your FPS at 120fps. Also are you going to play at 1080p? or 1440p and downscaling?

Only problem is getting a 5950x. If you cannot find one around Msrp then going with the 2 PC build will be a better option. A 5900x would also be a Good option, you can look at some benchmarks of the 5900x using x264 slow and decide if the tradeoffs are worth it. As with the 5900x will run almost all games in 264 slow just fine, but you will have to tweak some settings for others. But I would recommend just streaming at 720p@60fps or 1080p@30fps @6000kb depending on the game or try turning off CBR. Another option is just upgrading your video card to a 3080 or 3090 and using nvenc.

But if you want the straight best settings x264 slow 1080p@60fps 6000-10,000kb cbr and your going to make the encoder rescale. Then I would get a 2nd PC.

Edit: Just read you have a 3900x. If using x264 medium the 3900x is fine just adjust some settings. If your using OBS you could go their and ask what settings to use. They are very knowledgeable and you can share a obs Diagnostic report https://obsproject.com/forum/list/windows-support.32/.
Few things that might help in x264 medium.

  1. Cap your in game FPS to 120 then stream at 60fps
  2. Run OBS in Admin
  3. Run the game in in 1080p and stream in 1080p
  4. Set your downscale filter to bilinear since your not downscaling.
  5. try out all those 1st if that does not help then Dont run CBR
Click to expand...

For us the 5950x and the 5900x is around 1.5k$ which is a lot also the 3080 and 3090 cost the same and even more on the 3090. So these options are out.
So instead I will kinda change up the things. So my current gaming pc with the 3900x will be the streaming processor and I will buy an old used gpu to it. A good looking one since the power of the gpu doesn't matter for the streaming pc.
Than I will add the 1080 TI to the gaming pc and the ITX build will be my gaming pc. As I understand the article published here: https://www.tomshardware.com/reviews/best-cpus,3986.html
The second best CPU-s after the Ryzen 5000series is the 10 Series intel processors. So I'm will thinking to buy a 10700k maybe a i9 only gaming on it. I can get these processors for around 300-400$.
What processor would you recommend for the gaming pc just for playing games?

  1. I can't cap my FPS since I'm playing 144Hz and the 240Hz monitor will arrive soon. So I need every FPS I can get.
  2. My SLOBS settings is perfect just my cpu can't keep up the game and the stream and the webcam and also animated effects on the stream.
  3. why cbr matter? does it slow the stream or what? If you wrote it bcs of my internet speed I'm having 1000/500 Mbps all the time. So 6Mb of uploading is nothing basically.
 
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