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I'm considering on buying a be quiet straight power 11 modular power supply (1st image), however all of them only have 20 pins for the main motherboard connector.

The motherboard I'm considering is a asus rog strix z-390e (3rd image), which has a 24 pin connector for power. would it be OK to connect a 20 pin cable to that, or could i use an adapter?

 

After looking around a bit more i found some more modular power supplies, like the asus rog strix 750G (2nd image) that have 6 pin sata power connectors, instead of the usual 5 or 4 pins.

What is the difference between these? does it still perform as well?

 

Also on the asus rog strix 750G (2nd image) the bottom left connector is labeled as "CPU/VGA/PCI-E". From what i know you cant connect a PCI-E power cable to the CPU power input on the top left of the motherboard, or else it will fry the motherboard. Is the power supply special in that it can detect what connector it is connected to? 

 

thanks in advance

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The PSU side of the cable is not standard, the component side of the cable is standard. So don't judge the cable based on the connector on the PSU.

For example, the Be Quiet Straight Power 11 550W has a cable set that looks like this:

image.png.d4561e8584749a5ae311e5b5024c6d93.png

 

All standard cables, perhaps with a non-standard other side.. but that does NOT matter.

Also, the PSU may come with a certain cable set, but is made to support another different set or combination. Keep in mind (as said above) the PSU side is not standard across the board so do NOT mix and match PSU cables.

 

So to judge the cable set with the Be Quiet model, from top to bottom:

24 pin (20+4 pin) connector: goes to your motherboard, on the right side.

8 pin EPS (4+4 EPS): goes to your motherboard, top left, CPU power.

8 pin PCIE (6+2 pin PCIE): Goes to your GPU. It's 6+2 pin, so doesn't matter if the PSU is 6 pin or 8/6+2 pin.

Cables with SATA next to it: Go to HDD's, SSD's, optical drives (DVD drives and such) and some other accesoires.

Cables with HDD next to it: often called 'molex'. You shouldn't encounter these connectors anymore.

 

So to put it simply do not bother looking at the amount of pins on the PSU side. It's of no importance, just check the cable set and check if the PSU is a good unit for you use:

 

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

mini_cardboard: a 4% keyboard build log and how keyboards workhttps://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/

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Connectors on the PSU side are not the same as on the Mobo side. 

 

Straight power will work fine. 

 

Would avoid the ROG PSU as its a focus PSU which has its issues.

 

8 minutes ago, lttsrtyuikjhgf said:

The motherboard I'm considering is a asus rog strix z-390e (3rd image),

Are you building a whole new system?

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1 hour ago, GoldenLag said:

Connectors on the PSU side are not the same as on the Mobo side. 

 

Straight power will work fine. 

 

Would avoid the ROG PSU as its a focus PSU which has its issues.

 

Are you building a whole new system?

yes im building a new system, but after looking at the replies ive decided not to get the ROG powersupply. i agree that asus isnt specialised on making PSUs

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19 minutes ago, lttsrtyuikjhgf said:

i agree that asus isnt specialised on making PSUs

Asus doesnt make PSUs. They got them from seasonic who does. But the Focus model has ripple issues when overloaded. As such it should be avoided. 

20 minutes ago, lttsrtyuikjhgf said:

yes im building a new system,

Budget?

Usecase?

Country?

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