29 minutes ago, bobcat999 said:

 

Does anyone have suggestions for the best way to do that on a 1080Ti?  Software etc?

My card is Gigabyte.  The software can over-volt, but not under-volt it seems.

You can undervolt in MSI Afterburner (even if it is not an MSI card) but it is far from intuitive and a bit time consuming.

You basically create a custom volt curve and then flatten it.

 

here is a tutorial

 

 

Edited October 11, 20205 yr by Glenn Fitzpatrick

Find the right frame restriction method for your hardware because when done optimally, you lose virtually nothing but, for lack of a more technically apt word, relax the entire system.  I'm fortunate that my screen does 30Hz refresh so for me it's vsync to 30Hz w/ the frame limiter in MSFS to 60, not 30.  This nets a very solid 30fps free from stuttering, with a GPU that runs around 68C, and a hyperthreaded CPU w/ 8 cores/16LPs that runs around 48-51C on air cooling. 

If I set the in-sim limiter to 60 and my monitor's refresh to 60Hz, and since I am running all settings at ULTRA and can't hit/maintain 60fps, you can see GPU utilization is maxed, the bottom two CPU LP15 and LP16 is at 65% combined and the current frame rate was 37, and it was hovering around that when I printed the screen:

Now set the monitor to my default 30Hz.  Notice LP15/16 are now at 46%, CPU temp down a few to 46C, and of course the current frame rate is 30 and stays that way until the RTX2070 Super's 8GB VRAM is hit or GPU utilization in this relaxed state approaches 100%.  And that will happen mainly in certain kinds of weather and other, so will turn down shadow densities and reduce volumetric clouds to HIGH, and have in spots had to reduce LOD to 180.  I do want to upgrade the GPU to 16-20Gb VRAM, and want it to be in a 30.x series GPU.  Definitely need more GPU power, VRAM sort of but I think the bigger need is in GPU processing power which I understand might be a greater need post DX12.

So yes, take advantage of this approach so your bits aren't having to work overtime with very little to show for it.  I believe in a double-blinded test where one looked at the 30Hz screen w/ frames locked at 30 by vsync, versus 60Hz screen w/ frame rate at 37 (in this example only of course) you would not notice the difference in MSFS.  I know you can limit frames using RTSS scanline 60(Hz)/2 and set frame limit to 30, but I haven't checked what that does to GPU and CPU utilization.  You can certainly have smooth flight with this approach.

8 hours ago, Glenn Fitzpatrick said:

You can undervolt in MSI Afterburner (even if it is not an MSI card) but it is far from intuitive and a bit time consuming.

You basically create a custom volt curve and then flatten it.

here is a tutorial...

Thanks!  👍

I have done this with good success.  I just moved the power curve down to about 90% in the end.  Doesn't go above 75C now with 2k (1440) @ 30 fps and 130% scaling. 

I won't mess any more as I am happy with that.  No CTD's in 4 hours flying.