[SOLVED] Two ATX 12 V 4+4 Pin power connectors on Gigabyte Z390 Aorus Master

Mar 17, 2019
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Hello guys ! I have two 2x4 ATX 12 V power connectors on my Gigabyte Aorus Master, and from the manual I don’t understand very clearly how to connect it. Manual says :
1/2) ATX_12V_2X4_1/ATX_12V_2X4_2/ATX (2x4 12V Power Connector and 2x12 Main
Power Connector)
With the use of the power connector, the power supply can supply enough stable power to all the components on the motherboard. Before connecting the power connector, first make sure the power supply is turned off and all devices are properly installed. The power connector possesses a foolproof design. Connect the power supply cable to the power connector in the correct orientation.
The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected, the computer will not start.
To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption be used (500W or greater). If a power supply is used that does not provide the required power, the result can lead to an unstable or unbootable system.
1214
ATX_12V_2X4_1/ ATX_12V_2X4_2
Why are two 2x4 12 V power connectors ? The second,what is it for ? Shoud I power them both ? Thank you.
 

taeioum

Upstanding
Jan 27, 2019
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I'm not really understanding. I've looked up pictures of that motherboard and all I see is a regular 24-pin power headers and two 8-pin headers, both are for the CPU. Assuming that your power supply has two 8-pin connectors, I'd just connect them both.

Which power supply do you have? Maybe then I could give you a direct answer.
 
Mar 17, 2019
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I have an I9 9900k CPU, a Seasonic Prime Ultra Titanium 1000W PSU and an MSI Ventus RTX 2080 ti GPU. Somebody asked the same thing on another forum and the answer was that the second power conector is added just in case, without a specific functionality, but I don’t trust in this answer, thats why I asked here, were are many specialists.
L.E. I found this mention on my Seasonic user manual :
Mainboard connection:
a. DO NOT force the connectors into place; the connectors are “keyed” so they can only fit one way. Make sure the connectors lock in their place securely.
b. Connect the power supply end of the 24/20-Pin convertible connector to the appropriate receptor on the power supply unit.
c. Connect the mainboard end of the 24/20-Pin convertible connector to the mainboard. Depending on the mainboard, you may need to either attach or detach the 4-Pin module of the 24/20-Pin connector.
d. Connect the + 12 V 4-Pin connector and the EPS + 12 V connector, if applicable.
e. If your system requires dual EPS + 12 V connectors, please connect the 8-Pin end of the second CPU 8-Pin connector into the appropriate 8-Pin receptor on the power supply unit. Then connect the mainboard end of this 8-Pin connector to the mainboard
Assuming that the two ATX 2x4 12V power connectors are EPS connectors, seems that the second connector is necessary to be plugged only if the system requires a second CPU 8-Pin connector.
I investigated more, and I found that the second 8-Pin connector is recomanded to be plugged if the CPU runs stock, at 3,6 Gb, such in my I9 9900k situation, in the same time in this scenario the system will run fine with only one 8-Pin connector plugged, but for severe overclocking with a power consumption above 300W, it is needed to be plugged both the connector for much more stability, so I will plug them both.Another problem with the second 8-Pin connector is that the PSU must support two such a connector.In my situation, my Seasonic Prime Ultra Titanium 1000W seems that it have two 8-Pin connectors and two cables provided for this.
View: https://m.youtube.com/watch?v=6J7qnr0YNH8

Thank you all for answer.
 
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Another important question about the two 8-Pin power connectors is wich are the two connectors of the PSU where it should be plugged these two cables ? Evidently, in the CPU/PCIE compartiment, but I'm not sure which two correct connectors are. I think to use the upper line in the left, the first and the second connectors of the PSU. Is it correct ? Thank you.
https://www.tomshardware.co.uk/seasonic-prime-ultra-titanium-1000w-psu,review-34284.html
 
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Another important question about the two 8-Pin power connectors is wich are the two connectors of the PSU where it should be plugged these two cables ? Evidently, in the CPU/PCIE compartiment, but I'm not sure which two correct connectors are. I think to use the upper line in the left, the first and the second connectors of the PSU. Is it correct ? Thank you.
https://www.tomshardware.co.uk/seasonic-prime-ultra-titanium-1000w-psu,review-34284.html

Plug into any of them, they are the same, it says CPU/PCIe.
 
Reactions: Violett
Mar 17, 2019
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Plug into any of them, they are the same, it says CPU/PCIe.
Excuse me, wich one did you used on your Seasonic Prime Ultra 750W ? I observed from your signature that we have the same motherboard and nearly the same PSU. Of course, the connectors wall on 750W is slightely different. Did you used two CPU 8-Pin cables ? Thank you very much.
 
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Excuse me, wich one did you used on your Seasonic Prime Ultra 750W ? I observed from your signature that we have the same motherboard and nearly the same PSU. Of course, the connectors wall on 750W is slightely different. Did you used two CPU 8-Pin cables ? Thank you very much.

Yes I am using both, supposed to use both. ;)

Do not listen to those types that say you don't have to, that is complete BS stated by some reviewers etc. that do that. It's all BS to cottle the budget buyers who don't have the proper PSU's to power the boards. But then people who would be buying a 9900K and a higher end MB to run it should be getting the proper PSU in the 1st place.

There is a ton of very bad information on this all over the internet that is continuously being parroted.

It is really very simple.

You can plug them into any of the ones in the CPU/PCIe section.

It doesn't matter which ones you plug them into.
 
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Reactions: Violett
Mar 17, 2019
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Yes I am using both, supposed to use both. ;)

Do not listen to those types that say you don't have to, that is complete BS stated by some reviewers etc. that do that. It's all BS to cottle the budget buyers who don't have the proper PSU's to power the boards.

It is really very simple.

You can plug them into any of the ones in the CPU/PCIe section.

It doesn't matter which ones you plug them into.
I will use both. Thank you a lot.😉
 
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These are my cables and the extensions for the EPS connectors:
  • 2 CPU 4+4 Pin cables provided with the PSU
  • 1 extension EPS 8 Pin (Cablemod)
  • 1 extension EPS 4+4 Pin (Cablemod)
Considering that the ATX 12V coneectors on the motherboard are 4+4 Pin, is it necessary to use two 4+4 Pin extensions( one for each cable), or is possible to combine the extensions wich I already have ? With another words, the 8 Pin extension is good too toghether with the 4+4 Pin extension ? Thank you.
 
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is it necessary to use two 4+4 Pin extensions( one for each cable), or is possible to combine the extensions wich I already have ? With another words, the 8 Pin extension is good too toghether with the 4+4 Pin extension ? Thank you.
If PSU cables can reach necessary connectors, then there is no need to use extensions (unless for aesthetic reasons). You can not use extensions alone (without PSU cables).
 
Reactions: Violett
Mar 17, 2019
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If PSU cables can reach necessary connectors, then there is no need to use extensions (unless for aesthetic reasons). You can not use extensions alone (without PSU cables).
Thank you for your post, but you did not answer my question. Sorry if I was not very precise.
Again,I want to use PSU cables ( the longer ones in the picture above) toghether with extensions ( the packed ones in the picture ), for aesthetic reasons, because the extensions are sleeved.
The Cablemod extensions set included two CPU extensions( both are in the picture):
-1 piece with 8 Pin
-1 piece with 4+4 Pin
My motherboard have two EPS power connectors, so, I have to use two cables and two extensions.
The question is about my two Cablemod extensions wich I already have, considering that one have 4+4 pin and the other have 8 pin.
Is it possible to use both these extensions in the same time, considering one is 4+4 pin and the other is different- 8 pin ?
4+4 pin connector is splited and 8 pin is not splited.
4+4 pin is the same 8 pin connector, just splited ?
I don’t know if I can use both my slightely different extensions, or shoud I buy two 4+4 extension, for to have only 4+4 connectors , since the cables and the motherboard connectors are 4+4 Pin ?
Thank you.
 
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Is it possible to use both these extensions in the same time, considering one is 4+4 pin and the other is different- 8 pin ?
Yes.
4+4 pin is the same 8 pin connector, just splited ?
4+4=8 It's the same connector. Only difference is, 4+4 you can divide and use , where only 4pin is required.

I don’t know if I can use both my slightely different extensions, or shoud I buy two 4+4 extension, for to have only 4+4 connectors , since the cables and the motherboard connectors are 4+4 Pin ?
Yes, you can use your existing extension cables.
BTW - motherboard connectors are all 8pin (not 4+4pin).
 
Reactions: Violett
Mar 17, 2019
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Yes.

4+4=8 It's the same connector. Only difference is, 4+4 you can divide and use , where only 4pin is required.


Yes, you can use your existing extension cables.
BTW - motherboard connectors are all 8pin (not 4+4pin).
Thank you.
Generally speaking, a splited connector can be used in the same conditions, like a non splited connector, without power voltage issues ?
I ask this, because the same situation is with my PSU PCIe cables, wich are all 6+2 Pin, but my RTX 2080 Ti GPU have two 8 Pin connectors.
I presumed since my PSU is some kind a high end source (Seasonic Prime Ultra Titanium 1000W),with the provided CPU cables and PSU cables splited, these PCIe cables can be used in splited mode or non splited mode ?
 
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