Hello everyone,
So I've been quite lucky to get RTX 3080 FTW3 Ultra few days ago. However I'm not able to run any game on it more than few minutes unless I manually set fans in X1 for 100%.
 
Setup:

• MOBO - Asus ROG Strix x570 - F
• PSU -  Fractal Design ION+ 860P
• CPU - AMD Ryzen 5600x
• Memory - F4-3600C16D-32GTZNC
• Storage - WD Black SN750 NVMe SSD 1 TB
• Display - 144hz
• Case -  Fractal Design Meshify C White
  • See fan position on pic (sorry for bad quality)
  • 
• GPU - RTX 3080 FTW3 ULTRA
  • BIOS  94.02.26.80.70 (The Latest install automatically by X1)
  • Drivers  27.21.14.5730
  • No overclocking done
  • Switch set to normal
  • Power - 3 separate 8 - pins

Issues:

• NMS - Cards start spins like crazy and then whole pc shuts down
• METRO Exodus - Same

Recovery and (unwanted) fix:

• Recover done by turning off PSU and wait a bit then turn on PSU again
• Pimp up GPU Fans in X1 to 100%

 
I don't know what to do now I've already ordered new PSU Corsair HX850 to exclude it from the equation.
 

I would download the driver directly from nvidia, honestly, but you could also re-TIM the card if you're at all
familiar with the procedure. Certainly don't take the heat sink off if you're not confident or don't have the materials
necessary to do the job
 
 
edit: Also, do you have it set for "always max performance" in the nvidia control panel? That keeps the clock speeds high
and makes it stay warm...Mine is set to "Optimal power" and at stock settings it sits at 30C in a 21C room.
 
 

This is normal for this card and case. Evga cards run the hottest of the 3080s. I have the exact same card and case so can verify. Options are to either get a new case, undervolt your card, or trade your card for another brand. Have been multiple posts about this already.

For both danbenbb and ShadyMilkman...you guys need WAY more airflow through your case.
 
The GPUs pull 300 to 350W...and you have very little fresh airflow into the case...as well as only 1 exhaust fan to get the air out.  You need more airflow:

• Replace your intake fans with higher CFM fans...and run them faster.  The Fractal cases are know for having restrictive intake, so you might need fans that have higher static pressure as well.  A larger fan (140 mm) would help you here.
• For ShadyMilkman, your intake is through your CPU AIO.  Your best bet is to go push/pull for the fans on the radiator.  In push/pull, the CFM of the fans do not add, but the static pressure does add...allowing you to move more air through the radiator...and hence more air into your case
• You need more exhaust.  You both have a tiny fan that is expected to exhaust the airflow from 300 to 350 watts for the GPU (the GPU dumps the majority of the heat back into the case).  Get a 140 mm fan here with a high CFM rating (as there is little restriction for an exhaust fan).

The best fans that have a balance of CFM and static pressure are made by Noctua...but they are ugly.  However, Noctua has released some solid black fans that look pretty good, but don't have pretty RGB lighting.
 
From my experimentation, the best LED fans for CFM and static pressure are the Corsair ML PRO LED series.  NOT the ML PRO RGB...for the ML PRO RGB, Corsair has limited the maximum RPM...you get much better airflow from the ML PRO LED fans.
 
ShadyMilkman...you may have options to add exhaust fans to the top of your case.  This will help greatly.
 
danbenbb...exhaust fans on the top of the case may help, but you are air cooling your CPU.  You will have to experiment to see if exhaust fans will remove GPU heat without causing the CPU to get hot (due to the turbulence you will create around the CPU cooler.)
 
The best mid tower cases I have worked with for airflow are:

• Corsair Air 740
• Corsair Crystal 680X
• Lian Li O11 Dynamic XL

 
Good luck!

As others mentioned most likely due to poor airflow/circulation. For OP you could move the front fans to top exhaust and get better CFM fans for front intake. I've noticed a lot of people have higher thermals/issues running the larger style Air CPU coolers. 

If my problem is really air flow related then heat from GPU is prolly spreading to memory sticks (I've recorded 70 C on them) and they are quite low even under stress test.
However I don't think that this is issue of this case particularly if you check the setup of this guy this guy  it's mostly the same without any issues.
 
I'm about to test few things and find out if it's really a component failure or just airflow issue.
Component failure:

• Test PSU
  • Dedicated PSU for GPU only
  • Different brands
• Test GPU on different Motherboard
• Test CPU on different Motherboard with the same GPU

Airflow issues:

• Put it out of the case on test bench and use different types of cooling

 
The final step is to rollback to previous GPU firmware (I need to figure it out how to do this)
 

Easy test to see if you have poor airflow, as per the MANY, many threads on this subject in these very fourums:
 
Remove the side panel of your case. If temperatures drop, you need better case airflow to remove the heat that these 3080 320W (XC3) or 420W (FTW3) cards create. Be it with tweaking intake/exhaust fans, case fan speed, case fan number, or maybe even getting a better airflow case (or just leave the side panel off).
 
As to any card not having the fans turn on until 60C - that is normal, and part of the 0dB fan function. Set a custom fan curve with AB or PX1 if you don't like it, or in the case of the FTW3 you can also set the OC/Normal VBIOS switch to OC and the fans will spin at a minimum of 33% and have a more aggressive fan curve.

@arestavo That was actually the first thing that I tried and forgot to mentioned it. But thank you. And I played with OC/Normal setting too. 
 

@gabolton nothing only PSU and cables. I want to try this out too. 

ksgnow2010
For both danbenbb and ShadyMilkman...you guys need WAY more airflow through your case.
 
The GPUs pull 300 to 350W...and you have very little fresh airflow into the case...as well as only 1 exhaust fan to get the air out.  You need more airflow:

• Replace your intake fans with higher CFM fans...and run them faster.  The Fractal cases are know for having restrictive intake, so you might need fans that have higher static pressure as well.  A larger fan (140 mm) would help you here.
• For ShadyMilkman, your intake is through your CPU AIO.  Your best bet is to go push/pull for the fans on the radiator.  In push/pull, the CFM of the fans do not add, but the static pressure does add...allowing you to move more air through the radiator...and hence more air into your case
• You need more exhaust.  You both have a tiny fan that is expected to exhaust the airflow from 300 to 350 watts for the GPU (the GPU dumps the majority of the heat back into the case).  Get a 140 mm fan here with a high CFM rating (as there is little restriction for an exhaust fan).

The best fans that have a balance of CFM and static pressure are made by Noctua...but they are ugly.  However, Noctua has released some solid black fans that look pretty good, but don't have pretty RGB lighting.
 
From my experimentation, the best LED fans for CFM and static pressure are the Corsair ML PRO LED series.  NOT the ML PRO RGB...for the ML PRO RGB, Corsair has limited the maximum RPM...you get much better airflow from the ML PRO LED fans.
 
ShadyMilkman...you may have options to add exhaust fans to the top of your case.  This will help greatly.
 
danbenbb...exhaust fans on the top of the case may help, but you are air cooling your CPU.  You will have to experiment to see if exhaust fans will remove GPU heat without causing the CPU to get hot (due to the turbulence you will create around the CPU cooler.)
 
The best mid tower cases I have worked with for airflow are:

• Corsair Air 740
• Corsair Crystal 680X
• Lian Li O11 Dynamic XL

 
Good luck!

I have a Lian Li pc011d, should it run cooler in that?


Sorry forgot to mention, thank you everyone for your time put in for helping

Justikins
I ran into the same issue with my 3090 FTW3. Was running a corsair 175R with 3 intake and 3 exhaust fans. But the 3090 was producing so much heat, the case couldn't dump the heat out fast enough. Took the side panel off and it dropped 10c right away.
I switched to a Lian Li 011D and my temps went down quite a bit. It helps if you install two intake fans at the bottom blowing air straight up to the GPU. Now i'm getting 30-40c idle and 69-73c under heavy load. 

This is what I'm counting on to keep my GPU temps reasonable. I have 3x Noctua's running at ~75% as intakes on the bottom blowing straight into the side of my card, 3x on the side as exhaust, 1x in the rear as exhaust and the fans on Arctic are also configured as exhausts. I was undecided about whether to use the side fans as intakes or exhausts but stuck with my usual "if it doesn't have a filter" it isn't an intake.
 
If the queue gods ever smile on me I'll post back and let you know if my theory worked out. 

ShadyMilkman
I'm going to swap everything over tonight If the wife doesn't have me doing stuff. I have a Ryzen setup in the case so it's double work. On my Lancool 2 I opened the the side window and it doesn't get above 66c

That pretty well confirms it's an airflow issue.
 
Before you rip everything apart, if the AIO will fit up top and if you have some extra fans I'd try that first. You may be surprised.
 
Run the AIO as exhaust and the fans up front as intakes.

Ugh .. that's typical.
 
Still though .. if you have an extra fan or two I'd try putting them up top as exhausts and see what sort of temp difference you get with just that before I tore down 2 separate systems.

@ksgnow2010, @gabolton So I tried to play with airflow as you suggested.
I have bought two 14mm high CFW noctua fans (see pic below) one plugged as CHF and 2nd directly to AUX Fan connector on GPU. I also added one extra exhaust to top rear.
  
 
Temps:
With side panel 79 ~ 80 C.
Without 62 ~ 67 C. 

Good news, I swapped everything over lastnight and my idle temps are 26C