Using a 240hz Monitor; While game is open, whole monitor is locked to 120hz when when game's minimized

[leia]

I'm using an Nvidia RTX 3080 10GB and a 240hz 2560x1440 monitor. I have two more such screens to the left and right of my main monitor, adn they are the exact same model. My right screen is locked to 120hz due to being forced to use an HDMI cable instead of a DisplayPort cable, which my center and left monitors use.

No matter how I start the game, before the "Sony Presents" screen shows, a 'do circles with my mouse' test reveals it's still 240hz. When I load into the game select screen, though, I'm locked to 120hz (or lower - a mouse test is a crappy way to tell fps, but it at least gives a general idea.) I can tell, because my right monitor is locked to 120hz because I'm stuck with HDMI on that monitor. (Not an issue my main monitor has, being the one I use to run Spider-Man.)

When I use Fullscreen and lower the resolution, I can achieve higher FPS - when I use 800x600, for example, my monitor will once again show 240hz.

Keep in mind, this is for the entire monitor, not just the game. If I minimize the game, the monitor will still be stuck at 120hz, even if I use the Windows Display menu to switch it to 120hz, 60hz, or anything else, then back to 240hz. It seems to me like the game is taking exclusive control of my monitor settings - not okay.

Note: A mouse test isn't a good way to tell FPS - it seems like while the game is open, my main screen may be even lower than my right screen (again, which is locked to 120hz).

[leia]

I've found a fix! On Windows 11, I opened Nvidia Control Panel, then gone to 'Manage 3D settings', then 'Program Settings'. I clicked 'Add', then added Marvel's Spider-Man Remastered.

Next, I found the 'Monitor Technology' setting, which was set to G-Sync. I set this to 'Fixed Refresh'.

It turns out the game uses G-Sync to force it's refresh rate on the whole monitor, something I didn't realize could happen. In case anybody finds this and has the same issue, I hope I was able to help.