Windows 10: 2 video cards, NOT SLI, trying to solve downclock issue

My son has a new PC with an EVGA 2080 Super FTW3+ Ultra video card. He runs 3 monitors. 2 of them are 60Hz, and 1 of them is 144Hhz. When all 3 monitors are plugged in, at idle, the Nvidia 2080Super is running at 1,650Mhz and not downclocking. If I disconnect either of his 60Hz monitors, leaving him with a 144Hz and a single 60hz, the video card WILL downclock to 300Mhz at idle. If I take his 144Hz monitor and set it to 60hz and he runs all 3 monitors, the video card WILL downlock to 300Mhz at idle.

I don't like the 2080Super always running at full clocks for following reasons

1. Power usage. When the 2080super is at 300Mhz, idle power usage is 20w. When the 2080 super is at 1,650, at idle power usage is 48w.
2. Heat. When the 2080 super is at 300Mhz, idle temps are about 35C. When the 2080 super is at 1,650, at idle, temps are about 50C.

Solving the problem has a few options

1. Have him run on 2 monitors only, 1 at 144Hz and 1 at 60Hz. But who wants to go back to 2 monitors when you have had 3 for years?
2. See if adding an additional 144Hz monitor and removing a 60Hz monitor works right. I'm thinking that with 2 at 144Hz and 1 at 60hz, it's going to be the same issue I am seeing with 2 at 60Hz and 1 at 144Hz.
3. I am considering buying something like the MSI GeForceGT710 PCIe video card for $50, and installing this into his PC as well. We can move 1 of the 60Hz monitors over to the secondary video card, leaving a single 60hz and single 144hz on the 2080 super. This should in theory allow the 2080 super to downclock at idle again just like it does now when I unplug one of the 60Hz monitors.

Any major concerns with adding a single cheapo video card by Nvidia, simply to run 1 of the monitors?

:)

 

Need help with SLI Graphics Card Issue.


So the problem is identical in both Win8 and Win10.

My suggestions (in no particular order:

1. Try a different bridge (a 3-way should also work for example if one came with your motherboard)
2. If possible, try both graphics cards, configured for sli, in another system. Hopefully you have a friend with a compatible system.
3. Test your PSU with a multi-meter.

Edit: And to confirm. You are saying sli configuration was previously functioning correctly within your Win10 installation before failing 'out of the blue'?

 

What are the requirements for using SLI?

The facts here are as follows:

• SLI is successfully marked as enabled in the Nvidia Control Panel,
  
• Video performance is bad.
  

If we couple these facts with the Nvidia article of
Introduction to SLI Technology
which says:

And then add the evidence that shows that SLI is very effective for your
video card, in the TechPowerup article
NVIDIA GeForce GTX 960 SLI Review
that says this:

If we take all these facts in consideration, the natural conclusion is that for
some reason your SLI bridge is not functioning.
The two video cards have probably established SLI across the PCIe bus,
with resulting poor performance, as described in the documentation.

It is impossible to analyze a physical problem causing the non-functioning of the SLI
bridge without physical access to the computer.

A software problem can only be in the driver.
Try in the page of
NVIDIA Driver Downloads
to use the option of "Automatically find drivers for my NVIDIA products", so as
to let NVIDIA analyze your hardware and suggest the right driver.
Verify that it's exactly the one that you are already using.

 

SLI with different cards

Gtx690 and 660

So, after trying the guide again after uninstalling the latest drivers and then going through the guide step by step i got this: Apply a sli cable between the 2 sli ready gfx cards in order to get maximal 3d performance

She picture below (In Danish though)

Anyone got any ideas as to solve this problem?