Heh, you are right, I'm running at 63C.
Here is what I found about temperature.

At what temperature should I worry about overheating? Consider 85°C the limit for standard GPU operating temps. Your GPU may exceed this limit while under severe stress, but it shouldn't do so on a regular basis.

I did some more research and turning the graphics up or down won't help.

What is going on is that the game does not anything that will throttle how many frames it generates, the only setting that will help that is V-Sync. Turn it on so it will keep the frame rate equal to the monitor refresh rate.

It's on, that's the problem. Still shooting it up to 65C. My major problem is that, if this card cooks off for whatever reason, I can't replace it. So yeah, I'm probably overly paranoid about it, and that temp is fine. But it's just the thought of it even possibly going pop that worries me.

Maybe try to add the game using the "Half adaptative VSync" in your graphic driver?
It will slow the refresh by half, which should not be important for a turn-by-turn game,
but still you may not like seeing this...

It doesn't even come up on Geforce Experience. I point it straight at the folder where the game is located, it doesn't find it.

The previous person is talking about the nvidia control panel. It has options that can slow frame rate. open it up, click on program setting, go find the battletech.exe, go find the vertical sync, one of them is fast which is what I'm using and the other is adaptive half refresh rate, which means it will only refresh 30 times a second, effectively capping the refresh rate.

It's still not showing up on the pulldown list. I have to be doing something wrong...

Yeah, the list of programs can be very finicky, you might actually have to go and find the exe for battletech and add it to the list.

the default list is not complete: you have to click on "add"
and find the Battletech gog folder

Hello,

it keeps me wonderiing, why noone suggets the MSI Afterburner (pic below shows my temperature graph).
Fine tool and i use it for years and it keeps my graphicboards always in check :)
Actualy running a ASUS gtx1060 6GB @ ~55°C max.

https://www.msi.com/Landing/afterburner/graphics-cards