The 3 8-pin adapter is all that is required. I am using a CableMod custom cable of that configuration and when overclocked my 3090 Ti FTW3 Ultra hits the XOC bios power limit of 500W and the voltage limit at the same time. Technically 2 8-pins is all you need to deliver the necessary power but that's only with the good quality and design of the top name power supplies. So 3 8-pins are used only for redundancy to cover power supplies that may only be designed to the old spec of 150W per connector.
 
Notice that EVGA, Corsair, Seasonic and others have developed cables that have only 2 8-pins to 12 OR 12+4 pins 12VHPWR. That's because they know their power supplies can deliver better than 150W per connector.
 
No harm in 4 8-pins, just unnecessary.
Seasonic Prime PX-1300 is excellent and will work great with the 3 8-pins.
 
The 4090 however is different. To make sure that all users have the best experience Nvidia designed the card to look for all 4 8-pin connectors even though they are redundant but it covers all different make power supplies as long as total wattage requirements are met.
 
Edit: just saw the rest of your question. 4 8-pins won't show up in GPU-Z. It can only see the circuits that are on the card. Each 8-pin supplies 3 12v wires to the final connector and I'm assuming that the 4 groups of three are just stacked on top of each other. Others can please correct me if I'm wrong.

frankd3
The 3 8-pin adapter is all that is required. I am using a CableMod custom cable of that configuration and when overclocked my 3090 Ti FTW3 Ultra hits the XOC bios power limit of 500W and the voltage limit at the same time. Technically 2 8-pins is all you need to deliver the necessary power but that's only with the good quality and design of the top name power supplies. So 3 8-pins are used only for redundancy to cover power supplies that may only be designed to the old spec of 150W per connector.
 
Notice that EVGA, Corsair, Seasonic and others have developed cables that have only 2 8-pins to 12 OR 12+4 pins 12VHPWR. That's because they know their power supplies can deliver better than 150W per connector.
 
No harm in 4 8-pins, just unnecessary.
Seasonic Prime PX-1300 is excellent and will work great with the 3 8-pins.
 
The 4090 however is different. To make sure that all users have the best experience Nvidia designed the card to look for all 4 8-pin connectors even though they are redundant but it covers all different make power supplies as long as total wattage requirements are met.
 
Edit: just saw the rest of your question. 4 8-pins won't show up in GPU-Z. It can only see the circuits that are on the card. Each 8-pin supplies 3 12v wires to the final connector and I'm assuming that the 4 groups of three are just stacked on top of each other. Others can please correct me if I'm wrong.

donta1979

darli328
 
From a technical standpoint (and just curious), why does the PowerLink 41s have 4 - 8 pins if the extra 8 pin is redundant?
For reference the PSU I'm planing to pair this with is a Seasonic Prime PX-1300.
Thanks

Because how PCIe is setup on PSU's there is a twitter or reddit post about it, splitting the load between 2x pcie is fine power is equally distributed, 3x pcie cables due to psu design it puts too much load on one of the pcie cables and well heats them up more than it should, 4x pcie cables because of how psu's are designed kind of equally distributes the loads. Thus the EVGA Powerlink 41s. They didn't have to add the power filtering it's really not needed but what it actually does is evenly distributes the load over the psu and the 4 pcie cables, keeping those cables cool as a result. Those of us on the forums that actually got what I dub the power whip our cables are no longer hot to the touch with it like they were on the 3 pcie pin adapter with 3 pcie cables.

This makes a lot of sense.  Thank you!
That's too bad the 4 - 8 pins wont show up for the 3090 Ti.  That was going to be my excuse to get 4 pin over the 3 pin.

darli328
 
That's too bad the 4 - 8 pins wont show up for the 3090 Ti.  That was going to be my excuse to get 4 pin over the 3 pin.

The people who used the PerfE cable with the 2 8-pins connectors still saw 3 8pin voltage readings in GPU-Z.

darli328
 
At the moment I'm only running the bios that was pre-installed on the card.  Once I have everything setup and running (waiting on the Seasoinc PSU at the moment), I may flash the XOC bios.  Did you get the XOC bios off EVGA's forums somewhere or techpowerup?

Right here in this forum, the first post where Tech_Lee updates all the bios. Near the top.\
 
EDIT: oops forgot the link
https://forums.evga.com/FindPost/3407542
 

BIOS Flashes for EVGA GeForce RTX 3090 Ti cards

The EVGA GeForce RTX 3090 Ti FTW3 cards have an XOC BIOS to flash.
 
 

Wanted to give an update on this for anyone that comes across an issue like this in the future.
I tried a new PSU (seasonic px-1300) with no change in coil whine unfortunately (still loud/noticeable). Maybe a different PSU helps for some people/situations but it unfortunately didn’t for me.
I originally tried RMAing the card but later found out EVGA was not able to get a new card for the RMA due to stock issues. So, I ended up returning the 3090 ti all together due to the coil whine and I must say EVGA’s customer service has been amazing for me. I really appreciate their understanding of my situation, helping me return the card, and making it an easy process for me. I know others on here agree, but I wish EVGA were still making GPUs moving forward.

On another note. The one weird thing that happened after reinstalled my previous 3080, it is now make some very subtle coil whine that I’m sure was not there before. Tried two different power supplies and no noticeable difference in the coil whine from the 3080. It is definitely way more subtle than the 3090 ti was. And, I have no idea why this would coil whine now.
Maybe my motherboard is a partial contributor it GPU coil whine?

frankd3
The 3 8-pin adapter is all that is required. I am using a CableMod custom cable of that configuration and when overclocked my 3090 Ti FTW3 Ultra hits the XOC bios power limit of 500W and the voltage limit at the same time. Technically 2 8-pins is all you need to deliver the necessary power but that's only with the good quality and design of the top name power supplies. So 3 8-pins are used only for redundancy to cover power supplies that may only be designed to the old spec of 150W per connector.
 
Notice that EVGA, Corsair, Seasonic and others have developed cables that have only 2 8-pins to 12 OR 12+4 pins 12VHPWR. That's because they know their power supplies can deliver better than 150W per connector.
 
No harm in 4 8-pins, just unnecessary.
Seasonic Prime PX-1300 is excellent and will work great with the 3 8-pins.
 
The 4090 however is different. To make sure that all users have the best experience Nvidia designed the card to look for all 4 8-pin connectors even though they are redundant but it covers all different make power supplies as long as total wattage requirements are met.
 
Edit: just saw the rest of your question. 4 8-pins won't show up in GPU-Z. It can only see the circuits that are on the card. Each 8-pin supplies 3 12v wires to the final connector and I'm assuming that the 4 groups of three are just stacked on top of each other. Others can please correct me if I'm wrong.

 
First time posting ever so bare with me but I'm in need of this type of advice. I just got the 3090 TI FTW3 Ultra that came with the x3, 8-pin to x1, 12-pin connector. If I understand it correctly x2 of the 8-pin are mandatory while the 3rd is redundancy/overclocking as possibility listed here. I'm not sure if I want to stick with a Evga PSU after seeing some reviews. Currently I'm thinking the Seasonic Prime TX-1300. That also happens to come with the 12VHPWR. The cable is a x1, 12-pin to x2, 8-slots (only 6-pins in each with a total of 12). Would that still give the maximum power required to run the 3090 TI? As if I had used two or three of the original 8-pins? I have no desire to move to the 40 series at all. Any help or information would be amazing!

evil_isy

frankd3
The 3 8-pin adapter is all that is required. I am using a CableMod custom cable of that configuration and when overclocked my 3090 Ti FTW3 Ultra hits the XOC bios power limit of 500W and the voltage limit at the same time. Technically 2 8-pins is all you need to deliver the necessary power but that's only with the good quality and design of the top name power supplies. So 3 8-pins are used only for redundancy to cover power supplies that may only be designed to the old spec of 150W per connector.
 
Notice that EVGA, Corsair, Seasonic and others have developed cables that have only 2 8-pins to 12 OR 12+4 pins 12VHPWR. That's because they know their power supplies can deliver better than 150W per connector.
 
No harm in 4 8-pins, just unnecessary.
Seasonic Prime PX-1300 is excellent and will work great with the 3 8-pins.
 
The 4090 however is different. To make sure that all users have the best experience Nvidia designed the card to look for all 4 8-pin connectors even though they are redundant but it covers all different make power supplies as long as total wattage requirements are met.
 
Edit: just saw the rest of your question. 4 8-pins won't show up in GPU-Z. It can only see the circuits that are on the card. Each 8-pin supplies 3 12v wires to the final connector and I'm assuming that the 4 groups of three are just stacked on top of each other. Others can please correct me if I'm wrong.

 
First time posting ever so bare with me but I'm in need of this type of advice. I just got the 3090 TI FTW3 Ultra that came with the x3, 8-pin to x1, 12-pin connector. If I understand it correctly x2 of the 8-pin are mandatory while the 3rd is redundancy/overclocking as possibility listed here. I'm not sure if I want to stick with a Evga PSU after seeing some reviews. Currently I'm thinking the Seasonic Prime TX-1300. That also happens to come with the 12VHPWR. The cable is a x1, 12-pin to x2, 8-slots (only 6-pins in each with a total of 12). Would that still give the maximum power required to run the 3090 TI? As if I had used two or three of the original 8-pins? I have no desire to move to the 40 series at all. Any help or information would be amazing!

For some strange reason I never got a notice that you responded to my post with a question.
Fortunately Sajin saw it and answered. Same answer I would have given for the 3090 Ti.