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Helpful ReplyHot!3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables?

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ty_ger07
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 07:32:59 (permalink)
donnie123
Would you mind explaining where could I find some information about "BIOS" helping with the issue of plug 3 limitations?


Posted in a different similar thread:
grabibus
The only way is to flash with a 2x8 pin bios as the KFA2. 390W bios.

It bypasses the power limit and you can boost with expected frequencies and voltages.

At your own risk of course...

Since I don't own the card, obviously I can't validate that it works. That's just what has been reported.

If the bios is able to fix this issues, why doesn't EVGA try to fix this with their own bios fix?

It doesn't really fix the issue. It just breaks power monitoring of PCI-E plug #3. It's hacky. BIOS is reviewed and authorized by NVIDIA. If EVGA wanted to release an official BIOS which breaks power monitoring of plug #3, I don't think that NVIDIA would ever approve.
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moadib2k
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 08:36:39 (permalink)
Another "me to" post. 
Power 1: 117
Power2: 130
Power 3: 34
GPU Load 100%. 
Power Consumption: 87%
PerfCap Reason Pwr
 
I am confused by the support response from earlier.  Are they saying this is not an issue?

Video Card: 24G-P5-3987-KR  - RTX 3090 FTW 
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MDG73
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 08:43:13 (permalink)
moadib2k
Another "me to" post. 
Power 1: 117
Power2: 130
Power 3: 34
GPU Load 100%. 
Power Consumption: 87%
PerfCap Reason Pwr
 
I am confused by the support response from earlier.  Are they saying this is not an issue?


That is what support basically told me with my 3070 FTW3. Which I almost do not believe or which is kooky considering I got my daughter a Asus Strix 3060Ti and has proper balancing between the two 8-pin power plugs. I don't understand why both wouldn't be used equally if other board manufacturers can do it, why can't EVGA?

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moadib2k
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 08:45:58 (permalink)
MDG73
moadib2k
Another "me to" post. 
Power 1: 117
Power2: 130
Power 3: 34
GPU Load 100%. 
Power Consumption: 87%
PerfCap Reason Pwr
 
I am confused by the support response from earlier.  Are they saying this is not an issue?


That is what support basically told me with my 3070 FTW3. Which I almost do not believe or which is kooky considering I got my daughter a Asus Strix 3060Ti and has proper balancing between the two 8-pin power plugs. I don't understand why both wouldn't be used equally if other board manufacturers can do it, why can't EVGA?




If I am characterizing this correctly, my GPU is at 100% and so should be drawing full power.  Also curious by GPUz would say there is a performance cap.  I am a bit new to this so it could also be my understanding.
 

Video Card: 24G-P5-3987-KR  - RTX 3090 FTW 
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ty_ger07
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 08:53:35 (permalink)
moadib2k
Another "me to" post. 
Power 1: 117
Power2: 130
Power 3: 34
GPU Load 100%. 
Power Consumption: 87%
PerfCap Reason Pwr
 
I am confused by the support response from earlier.  Are they saying this is not an issue?

Oof! That is absolutely terrible! I would RMA it. 100%

If EVGA won't approve the RMA, fight them. Their warranty covers defects in design and manufacturing.

If EVGA still refuses, you could try returning it to whomever you bought it from for a refund, or sell it to someone who doesn't care, and try buying another one and hoping for better luck.
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donnie123
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 13:34:04 (permalink)
I guess I'll live with my 430w power draw and 100w plug 3 limit :) It works pretty well in games anyway. Maybe EVGA will find a way to fix it in a bios update or something one day.
 
 
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 16:20:10 (permalink)
bmwm3smg
Any ideas on what is going on with the 8-Pin #3 Power draw on my new 3090 FTW3? These were the max numbers on my first Port Royal run on my card. Default settings (no OC), running the OC Bios (same results with the Normal Bios). Power Supply is a 1300 G2. Please let me know if I missed any pertinent info that you guys need.

Thanks!
 
Lester


Man, sorry for crashing in... Maybe this is old news already, but after seeing your post I made some tests here with my 3090... In Furmark the 3rd 8 pin cable stayed at around 70W and total board power around 320... Cables 1 and 2 was getting 120W give or take. Ok... I installed OCCT and used their stability test for vga... well... now things got a lot more interesting... Total card power raised to spikes of 450W (I'm using the stock "OC Bios" switch) and all three 8 pin power were using full 150W. So... Maybe it's by design... The third one is the last one requested, just in case of extreme power usage.


Just my 2 cents... Sorry if this was already mentioned. I hope it helps.
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MDG73
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 16:59:16 (permalink)
ClowReed
bmwm3smg
Any ideas on what is going on with the 8-Pin #3 Power draw on my new 3090 FTW3? These were the max numbers on my first Port Royal run on my card. Default settings (no OC), running the OC Bios (same results with the Normal Bios). Power Supply is a 1300 G2. Please let me know if I missed any pertinent info that you guys need.

Thanks!
 
Lester


Man, sorry for crashing in... Maybe this is old news already, but after seeing your post I made some tests here with my 3090... In Furmark the 3rd 8 pin cable stayed at around 70W and total board power around 320... Cables 1 and 2 was getting 120W give or take. Ok... I installed OCCT and used their stability test for vga... well... now things got a lot more interesting... Total card power raised to spikes of 450W (I'm using the stock "OC Bios" switch) and all three 8 pin power were using full 150W. So... Maybe it's by design... The third one is the last one requested, just in case of extreme power usage.


Just my 2 cents... Sorry if this was already mentioned. I hope it helps.


Just tested your theory and I still get a discrepancy of 30 to 40w difference even in OCCT with Perfcap of PWR. Power draw on pin #1 12.0v on pin #2 11.9v. wonder why the dip on pin 2?
Damn, I was hoping that was the case for me.

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zeejay
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 18:55:05 (permalink)
Add my 3090 FTW to the list. Getting about 140, 150, 75, Where's my other 75 watts evga? Card still runs ok but it could be better if the 3rd 8pin wasn't gimped.
 
I wonder if this is even fixable without some sort of hacked bios or using a 2x8 pin as bios as a work around. Such a shame that they can't get it right.
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ty_ger07
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 21:43:49 (permalink)
Hot take: If the power balancing works properly, it should be able to balance throughout the entire range of loads and applications.  I realize that it doesn't really matter until you reach the max on any individual input, but it is silly if it can't power balance at lower loads either. Observing that it doesn't power balance properly in Furmark but can power balance properly in OCCT is kind of silly.  This is just another indicator of power balancing which isn't effective.  Like I say, I realize that it doesn't really matter until you reach a max where a power limit is being imposed, but, you see this is an indication of an implementation limitation.
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donnie123
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/17 23:20:53 (permalink)
It doesn't power balance correctly in OCCT either. Maybe the guy who mentioned it is just lucky and his works as intended but mine and several others can't push more then 98-100W on plug 3 no matter what's the test. 
 
My OCCT has it Slot 50W, Plug #1 135, Plug #2 157W Plug #3 98.6W resulting in 440w max. I've observed however the avg is above 400w, and during the test my card is fluctuation from 405-440 often.. (throttling most likely). There is a theory this was done in the newer rev. cards to help mitigate the issue of cards dying and crashing.
 
To be honest it would be fair if EVGA at least gave out some statement? I know the card is able to push stock limits but many times we get Pwr capped even at 380+W if the damn rail overshoots the 150w mark.. 
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liweichen6
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/18 17:14:16 (permalink)
3090 KPE here, could this be the reason that I sometimes see power limit when the card is drawing only ~400W?
 

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Bozhemoy
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/19 06:38:42 (permalink)
Hi all,
 
I've used nothing but Radeons in my past 10 builds so this is my first Nvidia card since like 2002 and my first EVGA card ever.  I noticed that I was also experiencing the low power in pin 3 but pin 1 and 2 are also inconsistent.  Figured I'd add my results to this thread (I'm not sure if this difference is detrimental to the card in anyway, it seems to run everything at 1440p just fine at stock).  I've updated the XOC BIOS and had my OC set to +400 mem, +100 clock and 119% power. It seems like I'm capping out at 480W.  Not sure if this is something that's RMA worthy.  Here are my stats/results for Time Spy:

Looks like it won't let me post an image but my PCI-E power maxed out as follows:
 
P1: 149.821
P2: 168.906
P3: 93.283
 
With the above overclock I'm getting a 16065 score in Time Spy with a R5 3600, temps hovering around 68 degrees. GPU score alone is 20679.  Since I'm not too used to Nvidia cards, does this seem par for the course?


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donnie123
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/19 13:35:24 (permalink)
I don't think they'll rma it for that. Yours doesn't look that bad. Has anybody tried with different PSU's and see if there's a difference?
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ty_ger07
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/19 14:17:08 (permalink)
donnie123
Has anybody tried with different PSU's and see if there's a difference?

Yes, this has been tested using different PSUs, different cables, etcetera.  Also, testing different cards, using the same PSU and same cables shows that cards behave differently; each card has its own behavior.  This is page 3 of this thread.  There are 2 pages before this one.
The power balancing is on the card.  If the card can't power balance effectively, there is nothing external to the card which can change that.
post edited by ty_ger07 - 2021/02/19 14:23:03
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professordumbdumb
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/19 15:46:28 (permalink)
This issue exists on the kpe 3090 as well - however we've managed to overcome the limit by increasing the msvdd with classified tool.  This increases the internal clocks of the cache (as far as I know the higher voltage it runs increases the frequency with an internal v/f curve) which is finally able to feed the rendering pipeline with less latency per clock.  With a low msvdd - the card even at 2200mhz will not post scores consistent with other brands of card, but increasing msvdd by a small amount (have to play with to find the right number for certain external gpu clocks) - results in substantial performance increases - and also solves the power balancing issue.  Pre-msvdd tweaking - the card will run to the limit at 430w.  After msvdd - 540w and massive increase in performance.   I suspect that msvdd is power throttling the card far sooner than the global power limit would suggest.
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donnie123
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/19 16:34:00 (permalink)
That would explain why the power throttles sometimes happen at watts below the global power limit. But maybe the higher msvdd is not safe?
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Kylearan
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/02/19 21:12:58 (permalink)
Another issue on the non kingpin bios is the SRC Power limit linked to the 8 pin rail.
While all of the 8 pins have a "global" power limit, which is only one value which is related to TDP (8 pin + PCIE Slot power limit= TDP),
Each 8 pin has a "SRC" rail linked to it, which is usually 150W default, 175W max, and this limits the max 8 pin power draw (the 8 pin power limit doesn't, the SRC power limit for that rail does).
So there are 3 SRC's for three 8 pin cards.
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/03/13 12:29:45 (permalink)
I also have this question but for a 3080, I'm currently using 3 separate pcie cables and undervolted which helped, but will get random black screens from using firefox or just having my computer idle showing the desktop.
 
#1 shows around 65w
#2 shows around 104w
#3 shows around 21w
 
psu is a seasonic priime px-850
 
Thanks
post edited by syu1087 - 2021/03/13 12:34:19

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rjbarker
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Re: 3090 FTW3 Ultra Uneven Power Draw Across 8-pin cables? 2021/04/03 17:54:33 (permalink)
Appreciate all the great info here guys (the ones that actually provided some info vs the "kids n trolls"!
My 3080 FTW3 Ultra exact same thing with gimped power from PCI-E #3 plug.
Power is about 1/2 from Plug #3 vs #1 & #2.
 
With XOC 450w bios only can reaxh 395w!
 
btw psu Corsair AX1600i.

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