Nvidia mode significantly slower than other modes

[gl00ten]

Describe the bug
When switching to nvidia the framerate drops a lot when compared to hybrid or integrated.

I tested using this: glmark2

System info
Please include :OS: Manjaro Linux x86_64
Host: ASUS TUF Gaming A15 FA506II_FA506II 1.0
Kernel: 6.7.0-0-MANJARO
Uptime: 13 mins
Packages: 1319 (pacman)
Shell: bash 5.2.21
Resolution: 1920x1080
DE: Plasma 5.27.10
WM: KWin
Theme: [Plasma], Breeze [GTK2/3]
Icons: [Plasma], breeze [GTK2/3]
Terminal: konsole
CPU: AMD Ryzen 7 4800H with Radeon Graphics (16) @ 2.900GHz
GPU: NVIDIA GeForce GTX 1650 Ti Mobile
GPU: AMD ATI Radeon RX Vega 6
Memory: 3655MiB / 31513MiB

optimus-manager --status  ✔
Optimus Manager (Client) version 1.5

Current GPU mode : hybrid
GPU mode requested for next login : no change
GPU at startup : hybrid
Temporary config path: no

/etc/optimus-manager/optimus-manager.conf
#i tried a bunch of stuff. initially i was focused on decreasing power consumption but then i wanted to benchmark
[optimus]
startup_mode=hybrid

#startup_mode=integrated
#switching=nouveau
#pci_power_control=yes
#pci_remove=no
#pci_reset=no

#[nvidia]
#dynamic_power_management=fine

benchmarking results
hybrid
[build] use-vbo=false: FPS: 9311 FrameTime: 0.107 ms
[build] use-vbo=true: FPS: 10802 FrameTime: 0.093 ms
[texture] texture-filter=nearest: FPS: 8747 FrameTime: 0.114 ms

integrated
[build] use-vbo=false: FPS: 9463 FrameTime: 0.106 ms
[build] use-vbo=true: FPS: 10475 FrameTime: 0.095 ms
[texture] texture-filter=nearest: FPS: 8965 FrameTime: 0.112 ms

nvidia
[build] use-vbo=false: FPS: 2164 FrameTime: 0.462 ms
[build] use-vbo=true: FPS: 2667 FrameTime: 0.375 ms
[texture] texture-filter=nearest: FPS: 6234 FrameTime: 0.160 ms

i can hear the fan spin way faster and see the wattage rising in powertop but in the end i get less frames. any idea why?

note:
i did change the /etc/sddm.conf file
[X11]
#DisplayCommand=/usr/share/sddm/scripts/Xsetup
#DisplayStopCommand=/usr/share/sddm/scripts/Xstop

[nwildner]

Closing as a duplicate of #498
It also might not be entirely related to optimus-manager but, please follow that other issue and post any findings there
Have a nice week.