Applying chosen refresh rate in display settings doesn't actually change anything

[placid flume]

Here's an inxi dump:

inxi -Fxrz
System:
  Kernel: 5.4.0-171-generic x86_64 bits: 64 compiler: gcc v: 9.4.0 
  Desktop: Cinnamon 5.2.7 Distro: Linux Mint 20.3 Una 
  base: Ubuntu 20.04 focal 
Machine:
  Type: Laptop System: ASUSTeK product: ROG Strix G732LWS_G732LWS v: 1.0 
  serial: <filter> 
  Mobo: ASUSTeK model: G732LWS v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: G732LWS.310 date: 07/14/2020 
Battery:
  ID-1: BAT0 charge: 52.1 Wh condition: 52.1/66.0 Wh (79%) 
  model: ASUSTeK ASUS Battery status: Not charging 
  Device-1: hidpp_battery_0 model: Logitech Wireless Mouse B330/M330/M331 
  charge: 55% (should be ignored) status: Discharging 
CPU:
  Topology: 8-Core model: Intel Core i7-10875H bits: 64 type: MT MCP 
  arch: N/A L2 cache: 16.0 MiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 73598 
  Speed: 4200 MHz min/max: 800/5100 MHz Core speeds (MHz): 1: 4200 2: 4201 
  3: 4201 4: 4201 5: 4201 6: 4201 7: 4200 8: 4201 9: 4201 10: 4201 11: 4201 
  12: 4201 13: 4200 14: 4200 15: 4200 16: 4201 
Graphics:
  Device-1: Intel UHD Graphics vendor: ASUSTeK driver: i915 v: kernel 
  bus ID: 00:02.0 
  Device-2: NVIDIA vendor: ASUSTeK driver: nvidia v: 535.154.05 
  bus ID: 01:00.0 
  Display: x11 server: X.Org 1.20.13 driver: modesetting FAILED: nvidia 
  unloaded: fbdev,nouveau,vesa tty: N/A 
  OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa 21.2.6 
  direct render: Yes 
Audio:
  Device-1: Intel Comet Lake PCH cAVS vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus ID: 00:1f.3 
  Device-2: NVIDIA TU104 HD Audio vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus ID: 01:00.1 
  Sound Server: ALSA v: k5.4.0-171-generic 
Network:
  Device-1: Intel Wi-Fi 6 AX201 driver: iwlwifi v: kernel port: 5000 
  bus ID: 00:14.3 
  IF: wlo1 state: up mac: <filter> 
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASUSTeK driver: r8169 v: kernel port: 3000 bus ID: 03:00.0 
  IF: eno2 state: down mac: <filter> 
Drives:
  Local Storage: total: 953.87 GiB used: 354.82 GiB (37.2%) 
  ID-1: /dev/nvme0n1 vendor: Intel model: SSDPEKNW010T8 size: 953.87 GiB 
Partition:
  ID-1: / size: 937.33 GiB used: 354.82 GiB (37.9%) fs: ext4 
  dev: /dev/nvme0n1p2 
Sensors:
  System Temperatures: cpu: 52.0 C mobo: N/A 
  Fan Speeds (RPM): cpu: 2800 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
  1: deb [arch=amd64] https://dl.google.com/linux/chrome/deb/ stable main
  Active apt repos in: /etc/apt/sources.list.d/lutris-team-lutris-focal.list 
  1: deb http://ppa.launchpad.net/lutris-team/lutris/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com una main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  No active apt repos in: /etc/apt/sources.list.d/steam-beta.list 
  Active apt repos in: /etc/apt/sources.list.d/steam-stable.list 
  1: deb [arch=amd64,i386 signed-by=/usr/share/keyrings/steam.gpg] https://repo.steampowered.com/steam/ stable steam
  2: deb-src [arch=amd64,i386 signed-by=/usr/share/keyrings/steam.gpg] https://repo.steampowered.com/steam/ stable steam
  Active apt repos in: /etc/apt/sources.list.d/vscode.list 
  1: deb [arch=amd64,arm64,armhf] http://packages.microsoft.com/repos/code stable main
Info:
  Processes: 380 Uptime: 2m Memory: 62.59 GiB used: 1014.4 MiB (1.6%) 
  Init: systemd runlevel: 5 Compilers: gcc: 9.4.0 Shell: bash v: 5.0.17 
  inxi: 3.0.38 

More info below

When I go to the display settings in mint, I am able to see my laptop's screen's advertised refresh rate of 300hz, but after I select it and apply settings, I can still tell the monitor is running at 60hz. I initially suspected it to be a driver issue, as the monitor wouldn't show up in nvidia-settings, but after deleting and purging my nvidia drivers and reinstalling, my nvidia-settings is blank and I'm still experiencing the same issue. Anyone have any insight?

[sacred vessel]

1. There is something wrong with your Nvidia driver:

Display: x11 server: Xorg 1.20.3 driver: modesetting FAILED: nvidia

2. Do you have another monitor at 60Hz? Xorg cannot set individual refresh rates for individual monitors, you'll need some of the workarounds from here: https://www.reddit.com/r/linuxhardware/comments/mht7kn/workaround_for_multiple_monitors_with_different/

[placid flume]

I posted to the mint subreddit and found a solution for my issue; I'll repost it here