Is using a 24 pin and an 8 pin splitter to run 2 systems safe?

[Owsleygarcia95]

Just picked up a Phantek case that allows for an extra ITX board. I was looking into there dual system power supply, but its discontinued and I'm not paying 250 on ebay with no warranty. The itx build should almost never consume more than 100 watts, and I've seen some people saying its safe to use. It sounds kind of sketchy, just figured someone might have a better idea of how safe it is. I read one thread saying that you need to disconnect a wire from one of the systems that is essentially what tells it to turn on, which makes sense. Would really like to get an idea before I try this. Dual system power supplies don't really seem to exist.

[Dedayog]

49 minutes ago, Owsleygarcia95 said:

Just picked up a Phantek case that allows for an extra ITX board. I was looking into there dual system power supply, but its discontinued and I'm not paying 250 on ebay with no warranty. The itx build should almost never consume more than 100 watts, and I've seen some people saying its safe to use. It sounds kind of sketchy, just figured someone might have a better idea of how safe it is. I read one thread saying that you need to disconnect a wire from one of the systems that is essentially what tells it to turn on, which makes sense. Would really like to get an idea before I try this. Dual system power supplies don't really seem to exist.

 

[8tg]

I thought the enthoo X can take an sfx power supply in the bottom for two power supplies?

Regardless if that’s not an option, 24 pin splitters aren’t anything crazy for systems like this. I probably wouldn’t use an 8 pin splitter, just run another cable from the psu to the other board for that. Unless your secondary system is very low power.

 

The 24 pin can provide a lot but believe it or not, it’s not very much of the systems total load. Most of the load on the system will be the cpu and GPU, and both are fed 12v. Most of what’s on the 24 pin is pcie slot power, ram, integrated drives, chipset components and port power. Which is not a lot in comparison to the core components.

[8tg]

I don’t know what the modern equivalent is, but man I feel old realizing there’s GTX 670’s in this image

the bottom can take an sfx psu 

at least for this older model, but as far as I can tell the modern equivalent has the same spot?

[Owsleygarcia95]

3 minutes ago, 8tg said:

I thought the enthoo X can take an sfx power supply in the bottom for two power supplies?

Regardless if that’s not an option, 24 pin splitters aren’t anything crazy for systems like this. I probably wouldn’t use an 8 pin splitter, just run another cable from the psu to the other board for that. Unless your secondary system is very low power.

 

The 24 pin can provide a lot but believe it or not, it’s not very much of the systems total load. Most of the load on the system will be the cpu and GPU, and both are fed 12v. Most of what’s on the 24 pin is pcie slot power, ram, integrated drives, chipset components and port power. Which is not a lot in comparison to the core components.

Thanks. As I was looking at 8 pin splitters I remembered I had another cable. I remember messing with it and wondering why I only got 2 6x2s when I got my 7900xtx. Then I found the 16 pin that likes to melt onto 4090s with 2 6x2s on the other end so I used that. I got an enthoo pro 2. I think it takes an extra power supply but it essentially goes right where the itx board goes so they make you buy there 250-400 power supply that's discontinued. 250 on ebay. No thanks. Good to know all of that though, thanks. I just built my pc about 6 months ago, hadn't done it for about 20 years so basically everything is different now lol.

[Owsleygarcia95]

10 minutes ago, 8tg said:

I don’t know what the modern equivalent is, but man I feel old realizing there’s GTX 670’s in this image

the bottom can take an sfx psu 

at least for this older model, but as far as I can tell the modern equivalent has the same spot?

Lol. Yeah the lay out of this one is a lot different. I bought it for the drive bays( that are out of stock till February you only get 4). Up to 8 3.5s with itx build. 12 without... I started thinking about raids for a few days and when I found this for such a good deal I couldn't pass it up. 15 120mm case fans lol.

 

 

[8tg]

10 minutes ago, Owsleygarcia95 said:

Lol. Yeah the lay out of this one is a lot different. I bought it for the drive bays( that are out of stock till February you only get 4). Up to 8 3.5s with itx build. 12 without... I started thinking about raids for a few days and when I found this for such a good deal I couldn't pass it up. 15 120mm case fans lol.

 

Ah I see, so your spot for the second psu is also the spot for the itx system. Thanks phanteks, that’s totally an improvement over the previous generations /s

yeah just roll the splitter cables, it’ll be easier than either tracking down a dual system psu or getting the proper phanteks power splitter which also seems to be nonexistent 

[Owsleygarcia95]

Just now, 8tg said:

Ah I see, so your spot for the second psu is also the spot for the itx system. Thanks phanteks, that’s totally an improvement over the previous generations /s

yeah just roll the splitter cables, it’ll be easier than either tracking down a dual system psu or getting the proper phanteks power splitter which also seems to be nonexistent 

Yeah. I thought I was basically doomed without paying 250 for a lightly used one on ebay since they don't sell it. It is titanium but I would never do that without the 12 year warranty. And the one I have now is probably good enough for a 5090 if I just unplug the itx board lol. I hope I can afford to try it. 

[Owsleygarcia95]

19 hours ago, 8tg said:

Ah I see, so your spot for the second psu is also the spot for the itx system. Thanks phanteks, that’s totally an improvement over the previous generations /s

yeah just roll the splitter cables, it’ll be easier than either tracking down a dual system psu or getting the proper phanteks power splitter which also seems to be nonexistent 

Hey. I feel like google will be useless for this question. I think I finally picked a motherboard ( just going to get a good board with dual m.2's and 2.5gig and not deal with ali express bifurcation risers trying to get 10 gig and more sata), and I just had a thought that kind of relates to this thread. I'm kind of going to need 2 power buttons as I wouldn't think they make a splitter for that. Maybe the case has 2 sets of them? Looked like you have a phanteks case so I figured you might know. Couldn't find any diagrams of that for my case. 

[Owsleygarcia95]

19 hours ago, 8tg said:

Ah I see, so your spot for the second psu is also the spot for the itx system. Thanks phanteks, that’s totally an improvement over the previous generations /s

yeah just roll the splitter cables, it’ll be easier than either tracking down a dual system psu or getting the proper phanteks power splitter which also seems to be nonexistent 

Never mind its 11.90 on amazon with 2 usb ports lol

[8tg]

2 hours ago, Owsleygarcia95 said:

Hey. I feel like google will be useless for this question. I think I finally picked a motherboard ( just going to get a good board with dual m.2's and 2.5gig and not deal with ali express bifurcation risers trying to get 10 gig and more sata), and I just had a thought that kind of relates to this thread. I'm kind of going to need 2 power buttons as I wouldn't think they make a splitter for that. Maybe the case has 2 sets of them? Looked like you have a phanteks case so I figured you might know. Couldn't find any diagrams of that for my case. 

The purpose of the psu splitter with that weird 24 pin is to habe both systems turn on and off together. That’s also why psu tester plugs are just a 24 pin with a single cable bridged to ground. It’s the signal cable for power toggle.

You can just get another power button if you’d like though, it’s just a 2 pin pc power button, you can get ones that are just external if you want it independently toggled.

But you will need to remove the power on pin from the 24 pin if you do that, because otherwise it’ll just turn on and off with the main system.

[Owsleygarcia95]

8 minutes ago, 8tg said:

The purpose of the psu splitter with that weird 24 pin is to habe both systems turn on and off together. That’s also why psu tester plugs are just a 24 pin with a single cable bridged to ground. It’s the signal cable for power toggle.

You can just get another power button if you’d like though, it’s just a 2 pin pc power button, you can get ones that are just external if you want it independently toggled.

But you will need to remove the power on pin from the 24 pin if you do that, because otherwise it’ll just turn on and off with the main system.

Ok thank you so much. You sound like you actually know what your talking about lol. Someone told me that I need to remove the power on pin, but they didn't explain it that well. So if I just use the 24 pin splitter, I don't need an extra button. I can just plug in both motherboards with that, have no power button header running to the itx board, and it will still power on just fine when I hit the power button? That signal cable you mentioned just tells the ITX board to boot and it works? I'd rather not have a button with a 6 foot cable and adhesive that won't last ( appears to be all that's available) if I don't need it.

 

I'm spending too much money as it is lol. I did simplify it quite a bit though. Just went with a high end ITX board and I can live with 2.5gig lan. PCIE bifurcation and multiple risers is expensive and it might not even work or be stable. And after thinking about it more I really couldn't care less if its a little slower. Went with a used 5600g for 19 more than a new 5300g. 35 bucks for 16gb of ddr4 3200mhz cl16. Going to just use a 1tb out of my current system for the OS because I got it for 30 with a rebate and it would be at least double that now. 

 

Thanks again for answering my questions. Some of this stuff is just really hard to google. AC is pretty easy to understand but I'm lost looking at a complex DC diagram lol.

[8tg]

12 minutes ago, Owsleygarcia95 said:

So if I just use the 24 pin splitter, I don't need an extra button. I can just plug in both motherboards with that, have no power button header running to the itx board, and it will still power on just fine when I hit the power button?

Yes, it will turn on when the psu turns on, it’s the green pin in this diagram

so with both systems on one psu with a splitter, it’ll turn them both on and off together

if you want them independently toggled on or off, you’d have to remove that pin from the second systems 24 pin and give it its own power button