3090 can't do more than 87% TDP (capped at 300w).

[Rkss]

My system spec
CPU: 13600k default , alright updated last MB bios
MB: Aorus z690
RAM: Trident 32x2 3600Mhz
PSU:NZXT C1200 gold
All air cooled

The GPU in question is Galax/KFA2 3090 SG. No matter what I do, the TDP can only hit 300w though this GPU is supposed to have 350w .
So far, I've tried Furmark, 3dmark demo, superpostion, plus regular gaming. GPU Core clock + voltage throttle as soon as the card hit 300w. The card is not overheated, even if I manually adjust fans to 90% which reduce temperature 4*C furthere, the maximum power consumption still not change one bit.
Otherwise, there is no obvious errors like crashing/shutting down/power down etc...


I uploaded tests I've done so far:
1st test. 5-10minutes Furmark, Gpuz sensors graph included. TDP 87% (300w). Percap reason = pwr ?
2nd test Several loop of 3marks time spy . GPU score is about 19400-ish, max power is still maxed@303w (hwinfo+ average3dmax graph included). As you can see the performance dropped as soon as it hits 300w
3rd test is just regular game with FPS uncapped. Percap reason = pwr, Vpop, Vrel. Power consumption also can't reach 350w.

At first I'd thought GPU has TDP capped by vbios but It doesn't seem to be the case. I have AB installed, the power limit is at 100%
Please help me identify the problem. Previous owner claimed this is a refurbished card, so I don't really know what's going on here.


Edit: I decided to plugged my old card to my system and found something interesting. This probably the cause (check the last picture in attachment).
I noticed the pcie slot power only draw 5w with 3090, while with my old 2070, it draws 50w and thus reach TDP limit of this card. This is why I can't reach tdp with 3090. Anyone knows what is the issue here?

 

[stahlhart]

Temperature limit in Afterburner?

Just a wild guess on my part, but it seems that Afterburner defaults to 84C whenever I install it here. and you're exceeding that in your hot spot. I can't recall now what it defaults to for priority.

Might also want to give PTM7950 a shot next time you re-paste the card.

 

[Rkss]

Temperature limit in Afterburner?

View attachment 387322

Just a wild guess on my part, but it seems that Afterburner defaults to 84C whenever I install it here. and you're exceeding that in your hot spot. I can't recall now what it defaults to for priority.

Might also want to give PTM7950 a shot next time you re-paste the card.

default is 83 in AB. It's for GPU core , not hotspot I'm sure.

I updated my first post. Found the problem but dunno what caused it

 

[droopyRO]

Previous owner claimed this is a refurbished card, so I don't really know what's going on here.

Did you try your 3090 on another system ? If not, try it, because you will then know for sure that the card is ok and you can work from there to find your issue.

 

[Assimilator]

I wonder if this is a driver bug - what happens if you roll back to a 560-branch driver?

 

[tugrul_LordOfDrinks]

8pin connectors are at around 150W. But pcie is at 5W. You want extra from pcie. So motherboard must be having a power saving mode. Try windows settings for that.

 

[LabRat 891]

Seems to be a known issue (also, the opposite. PEG slot over current).
A lot of Zotac units and some eVGA with the same issue, seem to come up in search.

vBIOS updates seemed to have the most change for users.

 

[Chrispy_]

8pin connectors are at around 150W. But pcie is at 5W. You want extra from pcie. So motherboard must be having a power saving mode. Try windows settings for that.

It could be this, but newer cards tend to draw less power from the motherboard these days. I haven't seen any 40-series cards draw more than about 35W of the 66W available, no matter how hungry the card is.

5W definitely sounds too low though, I typically see 15-35W with 3060/90, and 4060/60Ti/70/70S cards.

 

[Rkss]

Did you try your 3090 on another system ? If not, try it, because you will then know for sure that the card is ok and you can work from there to find your issue.

Yes , i did. Exact same issue on other system.
I'd wanted to give different vbios a try but ended up returning the card. So we'll never figure it out.

Out of curiosity, I looked for same card on internet and their PCIE slot draws more than 5W. I don't know which vbios owner are using thou.

 

[eidairaman1]

Yes , i did. Exact same issue on other system.
I'd wanted to give different vbios a try but ended up returning the card. So we'll never figure it out.

Out of curiosity, I looked for same card on internet and their PCIE slot draws more than 5W. I don't know which vbios owner are using thou.

That was the right thing to do, dont waste your time on stuff like that