MSI X570-A Pro - CPU Power 1 & 2 but PSU doesn't have right Pins?

aeropars · 29 Jun 2021 at 14:12

Hi Guys,

Just come to install my new motherboard to power my Ryzen 5900x and my relatively new PSU doesn't seem to have the right connector for CPU power. I have 2 x 4 pin connector on my "be quiet! Straight Power 11 650W 80 Plus Gold Modular Power Supply"

My motherboard has a 4 pin CPU 1 and a 4 pin CPU 2. I'm a little out of touch with modern motherboards but does that mean my PSU is not suitable for this new motherboard?

Thanks for your help.

Danny75 · 29 Jun 2021 at 14:18

Not sure I understand... do you mean your PSU appears to have a single 8-pin instead of 2 x 4-pin for the headers? If so it's simply joined and you can unjoin it. Similar to how you can join a 2-pin PCIe connector to a 6-pin to form the 8-pin if you're familiar with that. Have a play with it.

Earth[Tera].bin · 29 Jun 2021 at 14:18

CPU PWR 1 is 8 pin and CPU PWR 2 is a 4pin connector. CPU PWR 2 is optional, extra juice for overlocking I believe. Plug the 2 x 4 Pins into CPU PWR 1 and you should be good to go.

Is the chip supported out of the box?, you may need to update the bios first. Also remember the CPU doesn't have a built in iGPU.

aeropars · 29 Jun 2021 at 14:31

Danny75 said:
Not sure I understand... do you mean your PSU appears to have a single 8-pin instead of 2 x 4-pin for the headers? If so it's simply joined and you can unjoin it. Similar to how you can join a 2-pin PCIe connector to a 6-pin to form the 8-pin if you're familiar with that. Have a play with it.

The motherboard end of the CPU power cable basically has two 4 pin connectors. Out of the PSU its actually 10 pin but the cable has 2 blanks in the middle.

Earth[Tera].bin said:
CPU PWR 1 is 8 pin and CPU PWR 2 is a 4pin connector. CPU PWR 2 is optional, extra juice for overlocking I believe. Plug the 2 x 4 Pins into CPU PWR 1 and you should be good to go.

Is the chip supported out of the box?, you may need to update the bios first. Also remember the CPU doesn't have a built in iGPU.

Thanks for that. I thought it was based on my research but i've also got the latest bios for it. I have a dedicated GPU (RTX 2060 Super)

Earth[Tera].bin · 29 Jun 2021 at 14:48

This is the cable you're referring to?

https://cdn.mos.cms.futurecdn.net/ayT8aPQ5fWm4LbhWp39yHG.jpg

Combined socket goes into PSU, the split end goes into CPU PWR 1 and CPU PWR 2.

Looks like the split end is 2(4pin) and an 8 pin, is that correct?

EsaT · 29 Jun 2021 at 15:10

Earth[Tera].bin said:
This is the cable you're referring to?

https://cdn.mos.cms.futurecdn.net/ayT8aPQ5fWm4LbhWp39yHG.jpg

Combined socket goes into PSU, the split end goes into CPU PWR 1 and CPU PWR 2.

Looks like the split end is 2(4pin) and an 8 pin, is that correct?

Well, that's just bad design, because it doesn't give separate contacts for every power wire, but doubles current per contact in PSU's end.
Unless PSU's end has beefier higher current rated connector.
Which I doubt.

aeropars · 29 Jun 2021 at 15:23

Earth[Tera].bin said:
This is the cable you're referring to?

https://cdn.mos.cms.futurecdn.net/ayT8aPQ5fWm4LbhWp39yHG.jpg

Combined socket goes into PSU, the split end goes into CPU PWR 1 and CPU PWR 2.

Looks like the split end is 2(4pin) and an 8 pin, is that correct?

Not quite but similar. I dont have the combined 8 pin. Just have the two 4 pin connectors. On the PSU its says p8/p4 if that helps?

aeropars · 29 Jun 2021 at 15:31

Not sure if you can see this but i've got it plugged in like this: https://www.icloud.com/photos/#0fxPb7qkaEfPgoI5AnToGJKxw

Earth[Tera].bin · 29 Jun 2021 at 15:41

aeropars said:
Not sure if you can see this but i've got it plugged in like this: https://www.icloud.com/photos/#0fxPb7qkaEfPgoI5AnToGJKxw

Yeah, can make it out - plugged into CPU PWR 1. Should be fine .

https://cdn.mos.cms.futurecdn.net/MywGUzgqmN2F2kSHPTK4cF.jpg

aeropars · 29 Jun 2021 at 15:49

Yeah. Only difference is that the PSU end is 10 pin with 2 blanked out

lee32uk · 30 Jun 2021 at 14:39

Not relevant to your question, but that board is far from ideal for a 5900X. You might get some cpu throttling/VRM overheating depending on what you are doing i.e anything cpu intensive.

777GE90 · 3 Jul 2021 at 15:26

Looking on Be Quiet's website it seems your PSU comes with a 4 + 4 CPU connector which can either be used as as single P4 connector or a single P8 connector. I guess what you need is a single P8 connector + a single P4 connector? Just ask Be Quiet if they can ship you another P8 cable connector (if you have enough plugs in your PSU - if you don't then I think you need a new one).

Bilious · 28 Nov 2022 at 11:27

I have that motherboard. The two 4 pins clip together to form an 8-pin. You do not need a third 4 pin unless you plan crazy overclocking which that mobo is not suited for.

Orcvader · 30 Nov 2022 at 15:39

Bilious said:
I have that motherboard. The two 4 pins clip together to form an 8-pin. You do not need a third 4 pin unless you plan crazy overclocking which that mobo is not suited for.

You're a little late... the thread is more than a year old.