Trying to troubleshoot lower than expected FPS

Getting around 130fps avg frames, sometime dipping down into the 80's, when playing CS2. Did a recent system upgrade and presumed performance would be better than this for the build?

Gear:

• Ryzen 7 5700x 3.4ghz
• 6750XT 12gb ddr6
• 16gb 3600mhz ddr4
• m.2 SSD
• 144hz , 1440 screen with freesync
• Running Mint latest version

Have tried in-game settings at lowest, still not managing to get a stable FPS above 144. Mucking with settings doesn't seem to change performance much. Have set game to run with '-vulkan' which helped reduce some stuttering issues, but not much performance gain.

I also only get <100fps with other games like BG3. Figured this kit would be able to handle modern games a bit better. Any ideas what's going on?

EDIT: For future reference, the following changes were made and am now getting ~200fps

• Enabled asus EZ Tune in BIOS (rather than manually muck with each setting)
• Updated gpu drivers via 'amdgpu -install'
• Enable gamemode