jamexr
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Re: 3090 8-pin #3 low power usage?
2021/02/15 15:10:48
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Dabadger84
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Dabadger84
Some cards exhibit this, some don't. Some cards do this with the XOC BIOS, some don't. My 3090 FTW3 Hybrid had a similar spread of power usage, the 3rd 8-pin always lagged behind the others & the slot was almost always over spec under heavy loads...
All of my EVGA 3090 FTW3s did that with both the stock and XOC BIOS. Instead of drawing more power from the 3rd PCIE 8 pin power connector, the power draw through the PCIE slot would increase to 80+ watts along with the power draw from the #1 and #2 PCIE 8 pin connectors increasing to 150+ watts each. The #3 PCIE 8 pin connector didn't increase its power draw nearly as much as the other sources of power. It seemed to be an unusual behavior for power draw.
Worth noting, eVGA clearly "knows" how to do this properly/fix it, because the Kingpin (at least mine) does not have this problem on the 520W "LN2" stock BIOS. While the 3rd PCIe 8-pin does sometimes lag behind the others, they all level out during heavier loads, and the PCIe slot never goes over spec, at least not at a 520W draw, as seen in this screenshot after a Port Royal personal-best run:
Readouts:
Board Power Draw: 524.8W (actual according to the OLED Display peaked at 540W, it's odd the gap is that big)
PCIe Slot: 66.9W
8-Pin Power #1: 152.8W
8-Pin Power #2: 159.4W
8-Pin Power #3: 147.7W
I haven't used the 1000W BIOS cuz that's scary lol
While it's not perfect balancing, it's much better than what I saw from my 3090 FTW3 Hybrid on the XOC BIOS, which loved to load up the PCIE slot unnecessarily:
Board Power: 450W (on the "500W" XOC BIOS, what a load of BS)
PCIe slot: 79.8W
8-Pin #1 Power: 126.1W
8-Pin #2 Power: 129.6W
8-Pin #3 Power: 117.7W
I've seen people with much worse power-load balancing than mine on that card though.
I wouldn't compare the kingpin with the ftw cards. Your kingping has a way nicer "intelligent" power controller. Evga cheaped out on the power controller on FTW3 cards. Its controller is dumb and analog. Watch Buildzoids video review of ftw3 cards, its the worst controller out there for the price of the card. FTW cards should have used a better controller (even cheaper cards from other manufacturers use better ones). Unfortunately these controllers can't be "fixed" with a bios update or so. https://youtu.be/ZuimvlNraLM
post edited by jamexr - 2021/02/15 15:13:13
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Intoxicus
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Re: 3090 8-pin #3 low power usage?
2021/04/29 08:53:11
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Quesadillo
Testing my new 3090 I just got from RMA and I noticed that my power draws in gpu-z are averaging:
70-75w pcie slow
130-135w 8 pin #1
135-140w 8 pin #2
70-75w 8 pin #3
is this how it is supposed to work?
the last card I rma'd was around 80/110/110/110 if I remember right, this new card did have a firmware update when I opened precision x1 not sure if that had something to do with it
the voltage levels seem to be higher though, holding ~12.2 now vs ~11.8 on the old card, not sure if that really means anything
Are you using 3 separate cables or those splitters?
"Humans are not rational animals, humans are rationalizing animals." -Robert A Heinlein
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Dyezak
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Re: 3090 8-pin #3 low power usage?
2021/04/29 08:55:25
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Intoxicus
Quesadillo
Testing my new 3090 I just got from RMA and I noticed that my power draws in gpu-z are averaging:
70-75w pcie slow
130-135w 8 pin #1
135-140w 8 pin #2
70-75w 8 pin #3
is this how it is supposed to work?
the last card I rma'd was around 80/110/110/110 if I remember right, this new card did have a firmware update when I opened precision x1 not sure if that had something to do with it
the voltage levels seem to be higher though, holding ~12.2 now vs ~11.8 on the old card, not sure if that really means anything
Are you using 3 separate cables or those splitters?
This occurrs on 3 different cables, no splitters on everyone who has this problem. I've gone through this on 3x 3090 FTW3's with EVGA support. They have a problem on the power delivery side.
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LordSyrion
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Re: 3090 8-pin #3 low power usage?
2021/04/29 10:09:41
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Jack-Rabbit
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Re: 3090 8-pin #3 low power usage?
2021/07/29 12:31:49
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It appears this problem might be with rev 0.1 cards...
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KingEngineRevUp
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Re: 3090 8-pin #3 low power usage?
2021/07/29 12:43:05
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Jack-Rabbit
It appears this problem might be with rev 0.1 cards...
It seems this is the way EVGA designed the card. The 3080 Ti have the issue too and they came out well after the Rev 1 3090s.
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Mienko
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Re: 3090 8-pin #3 low power usage?
2021/07/29 13:12:05
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Jack-Rabbit
It appears this problem might be with rev 0.1 cards...
I have a rev 1.0 3090 and the first 2 8-pins hit 150ish while the 3rd tops out around 100 using the latest 500W bios (C002). The third 8-pin seems gimped.
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yangning8109
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Re: 3090 8-pin #3 low power usage?
2021/07/30 03:12:54
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3090 FTW3 has 23 power stages, 13 Vcore(NVVDD), 6 Uncore(MSVDD) and 4 Mem. Each Uncore phase consumes less power than Vcore. Less Vcore power stages are connected to #3 8pin of FTW3. Kingpin and some cards from other vendors evenly distributed power stages to three 8pin connectors, so they don't have balance issue.  Besides different VRM controller, another main difference between board rev 1.0 and rev 0.1 (PCIE out-of-spec power issue) of FTW3 also relies on different power stages connecting to PCIE power input. While 3080Ti FTW3 still uses rev 0.1 board, it doesn't have PCIE out-of-spec power issue because 3080Ti has 1 less memory power stage connecting to PCIE power input. You can 1 vacant inductor & DrMOS soldering pad on the left. However, all 3080, 80Ti and 90 FTW3 cards could have #3 8-pin low power usage issue due to circuit design of the connection between power stages and different 8-pin sockets. 
post edited by yangning8109 - 2021/08/01 14:49:42
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MDN79
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Re: 3090 8-pin #3 low power usage?
2021/09/16 08:19:15
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Ahhh, may I ask if it can be fixed by BIOS update or it's physically impossible?
My previous 3080 FTW3U drew out 100 Watts from #3 and totally used 460 Watts.
3080 ti now is able on 75 from #3 and 430 totally. Kinda strange and disappointing...
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homestyle
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Re: 3090 8-pin #3 low power usage?
2021/09/16 10:30:25
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Kokin
Quesadilloif I remember right, this new card did have a firmware update when I opened precision x1 not sure if that had something to do with it
Just a heads up: Precision X1 only installs firmware for LEDs and fan control, nothing relating to vBIOS or power control.
Not really. We were able to update our gpu bios for resizable rebar through precision.
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rjbarker
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Re: 3090 8-pin #3 low power usage?
2021/09/16 10:32:48
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Your stuck with it....I had just the opposite...3080 FTW3 w 450w XOC BIOS would only draw max 400w...PCI-E #3 always 1/2 of what #1 or #2 were...
Now the 3080Ti FTW3 draws 430w out of the box,,,,#3 PCI-E power is about 3/4 of either #1 or #2.....
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MDN79
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Re: 3090 8-pin #3 low power usage?
2021/09/16 10:40:35
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But for 10240 units 430 is too low.
500 is more wize...
It's hard to achieve more than 1995 in heavy loads.
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nosomo
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Re: 3090 8-pin #3 low power usage?
2021/09/16 16:09:33
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MDN79
But for 10240 units 430 is too low.
500 is more wize...
It's hard to achieve more than 1995 in heavy loads.
If you core isn't at 50c or cooler, it's not too much.
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rjbarker
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Re: 3090 8-pin #3 low power usage?
2021/09/16 19:37:58
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nosomo
MDN79
But for 10240 units 430 is too low.
500 is more wize...
It's hard to achieve more than 1995 in heavy loads.
If you core isn't at 50c or cooler, it's not too much.
My 3080Ti is still on air....thats 430w on air...I'll be swapping out the 3080 for it and installing the Water Block in a few days......even on air the Ti will hold steady at 1995 Mhz to 2020 Mhz at 72c.... Even though the 3080FTW3 will not draw more than 400w ...the Card is a champ....for most folks you will be hitting thermal limits long before pushing up past 430w +......
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MDN79
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Re: 3090 8-pin #3 low power usage?
2021/09/18 12:20:59
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nosomo
If you core isn't at 50c or cooler, it's not too much.
Really? Why not 35? It's a bad idea to invent your own fantasy "limits". 83 degrees is the officall NVida limit to reduce performance. As was mentioed above, 3080 ti pretty well works while consuming around 400 Wts. Then, I'm waiting for fullcover. After getting it, what should I do with the power limit and with just BAD distribution of the power between 8-pins? By the way, I'm able to achieve 2145 on air, can you imagine consumption I can get?
post edited by MDN79 - 2021/09/18 12:22:03
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MDN79
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Re: 3090 8-pin #3 low power usage?
2021/09/18 12:26:03
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rjbarker
Even though the 3080FTW3 will not draw more than 400w ...the Card is a champ....for most folks you will be hitting thermal limits long before pushing up past 430w +......
My 3080FTW3U easily eated 460 Watts. Have to say, it was cooler, then ti. I suggest better thermalpads for memory, as Ti has cooler memory, around 10 C degrees, but hotter chip at the same consunption, by 3-4 C.
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nosomo
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Re: 3090 8-pin #3 low power usage?
2021/09/18 16:09:33
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MDN79
nosomo
If you core isn't at 50c or cooler, it's not too much.
Really?
Why not 35? It's a bad idea to invent your own fantasy "limits".
83 degrees is the officall NVida limit to reduce performance.
There's a thermal boost profile as part of the cards programming. They don't run strict settings. They do however boost higher the cooler they are, to a point. It's obvious with the hybrid cards which clock faster despite being the exact same card as their air variants. Trying to brute force speeds by adding power is a poor way to go about it.
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MDN79
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Re: 3090 8-pin #3 low power usage?
2021/09/19 12:51:54
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nosomo
There's a thermal boost profile as part of the cards programming.
That's obvious. But why the situation is not as: EVGA said, EVGA did?! If you claim 450 Wts, please, be kind to programm that.
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