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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/09/24 15:59:39
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the_Scarlet_one
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/09/24 16:17:23
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Husky_
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/09/24 16:46:41
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I just bought a new 1300W PSU from EVGA (the G+) and was using it with the 3090 Ti FTW3 Ultra and was working fine. I assume that the 4090 would use the same amount of power? Will wait and see I guess....
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MrEWhite
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/09/28 12:05:08
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I honestly think, unless the the extra pins are required, the PerFE cable will work fine considering Nvidia said that the 3090 Ti has the same power draw as the 4090, and the PerFE works fine on the 3090 Ti.
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Nitemare3219
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/08 09:22:06
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I would also be interested in an updated cable/adapter for the 4090.
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ewitte
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/10 07:47:40
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I'm not sure about that. It is only the sense cables that are different. Cablemod said it didn't matter for their product. Possibly if you want to push over 450W I'm not sure. BTW they have updated 3x8pin and 4x8pin cables.
post edited by ewitte - 2022/10/10 07:48:46
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XrayMan
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 00:00:41
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Husky_
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 09:39:34
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I was able to get the MSI RTX 4090 Trio Gaming (non-X) and I believe it comes with the 3x 8-pin to 16-pin adapter in box and not the 4x 8-pin one.
I just wanted to know if the PeRF12 cable would work before I buy a cable from CableMod. Thing is, CableMod only has it on sale on the Global Store and the minimum order is ~80USD...
Also, I am super disappointed to have purchased an EVGA 1300W G+ PSU a couple of months ago for my build and now I dont see them offering a cable for the RTX4090 (I know they dont make GPUs anymore but that shouldnt matter). I should have went with Corsair.
Mistakes were made from my side but how could I have known at the time? Sigh...
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BTomov
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 17:41:30
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Husky_
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 17:55:35
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the_Scarlet_one
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 18:04:40
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If the founders comes with the quad 8 to 16, most of the AIB cards will likely come with the same cable as the founders. It wouldn’t make a ton of sense for the AIB cards to have less options than founders unless NVidia is intentionally limiting the AIB’s from being able to compete. Edit: Found a review online with the unboxing, and sure enough, the gaming trio only has the triple 8 pin. Such a weird choice. Hopefully the retail version has the updated cable. Please update when you get your card.
post edited by the_Scarlet_one - 2022/10/12 18:07:35
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Husky_
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 18:11:56
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gsrcrxsi
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 19:06:15
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EVGA_JacobF
It is not compatible with RTX 4090. (Different pinout)
can you clarify this? what exactly is different? the 3090Ti uses the same 16-pin connector as the 4090. and the power/GND connections (pin1-6 12v, pin7-12 GND) are the same between the 12-pin and the 16-pin, and the connector is physically compatible. so if the 3090ti uses the same 16-pin as the 4090, and the 3090ti will work, why wont the 4090?
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vcbb10
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/12 20:57:53
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Sense pins might be required on the 4090, not optional like the 3090 TI. I think the 4090 FE can tell if you only plug in 3 8-pins to the adapter and power limits itself. This would indicate to me that they would probably be required. I think non 3.0 PSUs probably need to bridge some grounds to sense pins to work properly. Obviously a 12-pin only adapter wouldn't do this. Nvidia doing Nvidia things and changing things later in the game. I bought 3 of the adapters to get ready for 40 series. Decided to bail on Nvidia 40 series after the EVGA debacle. I'd guess that EVGA is probably working on a new adapter with sense pins.
post edited by vcbb10 - 2022/10/12 21:08:45
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gsrcrxsi
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/13 05:58:44
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donta1979
gsrcrxsi
EVGA_JacobF
It is not compatible with RTX 4090. (Different pinout)
can you clarify this? what exactly is different?
the 3090Ti uses the same 16-pin connector as the 4090. and the power/GND connections (pin1-6 12v, pin7-12 GND) are the same between the 12-pin and the 16-pin, and the connector is physically compatible. so if the 3090ti uses the same 16-pin as the 4090, and the 3090ti will work, why wont the 4090?
Believe he’s talking about the founders because Nvidia wants to do it’s own thing.
The founders uses the same 16-pin. It’s not different. They have the same 12v on pin 1-6 and gnd on pin 7-12.
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frankd3
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/13 07:34:58
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gsrcrxsi
donta1979
gsrcrxsi
EVGA_JacobF
It is not compatible with RTX 4090. (Different pinout)
can you clarify this? what exactly is different?
the 3090Ti uses the same 16-pin connector as the 4090. and the power/GND connections (pin1-6 12v, pin7-12 GND) are the same between the 12-pin and the 16-pin, and the connector is physically compatible. so if the 3090ti uses the same 16-pin as the 4090, and the 3090ti will work, why wont the 4090?
Believe he’s talking about the founders because Nvidia wants to do it’s own thing.
The founders uses the same 16-pin. It’s not different. They have the same 12v on pin 1-6 and gnd on pin 7-12.
The adapter that comes with the Founders Edition has an integrated circuit built in so that when there are no sideband signals, from a pre ATX 3 - PCI 5 compatible psu, the ic tells the card how many 8-pins are plugged in. If only 3, then power is limited to 100%. If 4 then power can climb to 133%. The Nvidia card is assuming only 150W per 8-pin. I guess as a worst case type of scenario. Gamer's Nexus got the info from the Nvidia product manager and verified it in their lab.
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gsrcrxsi
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/13 08:18:41
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I think there was a miscommunication. I believe the “IC” is on the GPU PCB, not in the adapter itself. One of the other youtubers (maybe Paul?) took apart the adapter and didn’t find any IC, but found that 2 sideband connections are grounded, and two are not connected to anything.
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frankd3
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/13 08:35:10
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☄ Helpfulby Cool GTX 2024/03/09 14:10:56
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gsrcrxsi
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/13 09:14:33
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now that makes more sense.
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Axon14
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 09:24:14
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Do we have any clarity on this point yet?
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frankd3
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 09:32:22
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Axon14
Do we have any clarity on this point yet?
The PerfE cable will not work with the 4090. Jacob said the pinouts are different. But another reason (or maybe the same one?) is that the adapter cable has an IC in it that the card needs to sense how many 8-pins are connected. There are also ways to trick it with ground wires but the result is the same. I found that Igor's Lab discovered the IC and explains how it works. gsrcrxsi took my link and explained it in another thread https://forums.evga.com/FindPost/3580946
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the_Scarlet_one
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 09:42:41
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I found that same IC a month ago on the 3090ti cables, and posted about it on these forums. It’s the same set up, with the two sense cables running to a different location on the connector. Igor’s lab doesn’t even show this:   The 3090ti used the same type of connection. The only difference is that there are 4 connections, and the sense pins run to the +2 sense connections instead of to one of the grounds.
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frankd3
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 09:49:07
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I followed your destruction of that cable.
It seems that a lot of people somehow thought that Nvidia's cable would be different and denied the existence of the circuit board.
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the_Scarlet_one
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 09:55:48
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Nope, NVidia used the same concept, and updated the 4090ti a little.
In the end, twelve 16AWG cables are still providing power, and two 22awg cables are providing sense ground. That is why Corsair can use two 8 pins (only 7 cables per 8 pin) to a 12+2 pin. It’s still twelve 16AWG cables going to twelve 16AWG cables. PCI-SIG SHOULD address this, and updated the 6 pin and 8 pin rating, because it is still the exact same cables with slightly smaller connectors. There is no magic happening that makes 24 pins into 12. The only magic is how the circuit detects the 24 pins and grounds out the the two sense pins.
NVidia is only making it look like a fancy new connector is making a sudden jump in power possible. But that will never change the rating of a 16AWG cable, no matter how hard they try to push this.
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ryanprogers
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 11:44:03
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Aye, the sense pins are required for 4090 boards. If it doesn't see that the PSU is at least 300w, it won't work. See Corsair's new product and Jayz new video. The 12-pin pinout is indeed the same. So if you had a way to ground the other two pins, it would work. I honestly have no idea why Corsair built it the way they did, but it may have been a UL requirement? There's electrical reason to run a cable back to PSU ground when you have ground at the other end. Must be a UL requirements, because it's wasteful. On the Corsair cable it looks like a tacked on afterthought! Fingers crossed that EVGA comes out with a product with less suck to it, but with no 4090 cards, who knows? But, OTOH, PSU's are now their largest business, so you would think they would want to support their customers. They *will* sell a lot of them...
post edited by ryanprogers - 2022/10/14 13:12:40
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gsrcrxsi
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 13:17:45
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the_Scarlet_one
PCI-SIG SHOULD address this, and updated the 6 pin and 8 pin rating
they wont because there are so many older PSUs already out in the wild that were built to the old spec with smaller gauge wires. they have to assume worst case of the spec for the official rating. especially in the case of the 6-pin which supports a configuration of just 2x 12v lines with the 3rd (middle) being empty.
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ty_ger07
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/14 22:12:25
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I honestly have no idea why Corsair built it the way they did, but it may have been a UL requirement? There's electrical reason to run a cable back to PSU ground when you have ground at the other end. Must be a UL requirements, because it's wasteful. On the Corsair cable it looks like a tacked on afterthought!
This would be better with a picture. What are you talking about? My searches are not leading me to whatever you are describing.
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frankd3
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/15 06:54:17
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He's probably referring to Jay's video that demonstrates the Corsair cable https://www.youtube.com/watch?v=dbT84gxKnMA see it at 5:18 where it is obvious that the sideband pins-to-ground wires are added on rather than part of the flat cable design. Actually it doesn't surprise me that they did it that way. Also, the wires go all the way back to unused ground pins at the psu end. There must be a good reason to do that.
post edited by frankd3 - 2022/10/15 06:58:48
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Re: Will the EVGA PerFE 12 work on 4090 GPUs?
2022/10/15 07:03:26
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jay ick
not that interested
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