PSU power distribution

[OddsCrazyStuff]

Just to make things clear, a PSU dont care which cable you pull power from, toward its maximum watt?

 

Long story short, I need a 2nd PSU for my dual motherboard build, but since I already have a power full enough PSU, so dont I want to get more then just needed.

Which in this case means to cover a 144-200W CPU and an mATX motherboard (dual 8-pin and a 6-pin). Everything else will be done by the other PSU.

 

Also, does anyone know if I can use PCI cables as CPU cable, with an adapter?

It would makes it easier to lower the overall watt of the PSU.

[PineappleHolidays]

if you're going to get a second psu make sure it's a good one ( 500w ) and I recommend powering your gpu ( 1 or 2 )  off it ( so that both systems power up at the same time )

you can use whatever cables you want though, just be careful that psu's need to be "enabled" to turn them on, which is something your motherboard does.

 

would you mind clarifying the entire setup ?

[OddsCrazyStuff]

3 minutes ago, Mihemine said:

if you're going to get a second psu make sure it's a good one ( 500w ) and I recommend powering your gpu ( 1 or 2 )  off it ( so that both systems power up at the same time )

you can use whatever cables you want though, just be careful that psu's need to be "enabled" to turn them on, which is something your motherboard does.

 

would you mind clarifying the entire setup ?

Right now, so it this the PSU that seems like the best contender, in price and watt: https://seasonic.com/product/platinum-660/

 

As for turning them on, its as simple as turn on the system with the biggest PSU first, then the smaller one (a few sec apart).

That way, so dont I have to use any fancy tricks to power them.

 

---

 

Gaming pc motherboard: https://www.asus.com/Motherboards/X99-M-WSSE/

Streaming/video pc motherboard: https://www.asus.com/us/Motherboards/X99E_WSUSB_31/

2 GPU, 1 M.2, 8 sata for gaming. 1 GPU, 1 M.2, 8/10 sata, 5-6 PCI SSDs (I think the motherboard fills from the bottom).

A few usb deviced and dual network for both.

 

Or something along those lines, when I'm done building some time next year.

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6 hours ago, OddsCrazyStuff said:

Right now, so it this the PSU that seems like the best contender, in price and watt: https://seasonic.com/product/platinum-660/

 

As for turning them on, its as simple as turn on the system with the biggest PSU first, then the smaller one (a few sec apart).

That way, so dont I have to use any fancy tricks to power them.

 

---

 

Gaming pc motherboard: https://www.asus.com/Motherboards/X99-M-WSSE/

Streaming/video pc motherboard: https://www.asus.com/us/Motherboards/X99E_WSUSB_31/

2 GPU, 1 M.2, 8 sata for gaming. 1 GPU, 1 M.2, 8/10 sata, 5-6 PCI SSDs (I think the motherboard fills from the bottom).

A few usb deviced and dual network for both.

 

Or something along those lines, when I'm done building some time next year.

if you're going to do something, do it right, without the bodge of switching them on at different times.

if you feel confident, just split the "on" wire on the first PSU and solder it to the second ( do this somewhere hidden ) so they power at the same time

but would't it be better to spend the little extra and have 2 full psu's; like two 850w ? so you can switch them on and off independently ?

[OddsCrazyStuff]

1 minute ago, Mihemine said:

if you're going to do something, do it right, without the bodge of switching them on at different times.

if you feel confident, just split the "on" wire on the first PSU and solder it to the second ( do this somewhere hidden ) so they power at the same time

but would't it be better to spend the little extra and have 2 full psu's; like two 850w ? so you can switch them on and off independently ?

I have a 2000W platinum PSU already, as was planning to do 4 way SLI and water cooling with high power fans.

So rather then make it go to waste (no point trying to sell it), so do I just need the extra 24-pin and motherboard cables from a different PSU. A splitter wont work, as I just about everything but the GPUs and water cooling, gets power from the motherboard (some more then others).

 

A better idea would maybe be to mod the case button, so it went to both PCs.

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16 hours ago, OddsCrazyStuff said:

I have a 2000W platinum PSU already, as was planning to do 4 way SLI and water cooling with high power fans.

So rather then make it go to waste (no point trying to sell it), so do I just need the extra 24-pin and motherboard cables from a different PSU. A splitter wont work, as I just about everything but the GPUs and water cooling, gets power from the motherboard (some more then others).

 

A better idea would maybe be to mod the case button, so it went to both PCs.

quad SLI ?

there is really no point, especially if you go for 1080's

 

and if you only got two then you would be able to split the psu ( using the phanteks splitter ) or you could do as you say, but double psu's can be screwy, especially if one is loaded, because that can lead to instabilities or mobo damage

the idea is to avoid having two different "12v" going to the same pc, because under load that 12v might be 11.8 and the other psu might be giving 12.4, and these discrepancies have caused problems for me ( but I was using a pair of pretty average psu's )

 

I would let somebody else give you better recommendations for your idea

[OddsCrazyStuff]

4 hours ago, Mihemine said:

quad SLI ?

there is really no point, especially if you go for 1080's

 

and if you only got two then you would be able to split the psu ( using the phanteks splitter ) or you could do as you say, but double psu's can be screwy, especially if one is loaded, because that can lead to instabilities or mobo damage

the idea is to avoid having two different "12v" going to the same pc, because under load that 12v might be 11.8 and the other psu might be giving 12.4, and these discrepancies have caused problems for me ( but I was using a pair of pretty average psu's )

 

I would let somebody else give you better recommendations for your idea

Quad 980Ti was the plan (375W or so per when OC), with 3x 1440p monitors. But that has changed now.

 

Also I have done it before, when I tested for a faulty PSU. 1 PSU for CPU and motherboard, while the other handles GPUs.

It worked without a problem. With that setup, so should the 12V not be crossed ether, unless the GPUs gets 12V from the motherboard.

 

12V is 336W total, 5V is 70W total and 3,3V is 46W total. That is what the splitter is rated for.

My X99 CPU and Xeon take about 320W when running 100%. Plus with up to 18 storage, up to 5 pci storage and 2 m.2, so do I think the splitter cant handle it. Granted, I wont manage use all at the same time, but I should still be on the edge (if not over) during streaming.