Question PC experiencing lag and stutters everytime I install Nvidia drivers while using PCIE gen 4 config in bios

[Vergj]

Hi so Ive been experiencing very immense lag and stutters everytime I install nvidia drivers while using pcie gen 4 config in bios(set in auto but auto uses gen 4)
however everytime I turn the pcie slot config to gen 3 or use the second pcie slot which is gen 3 at default, the lag and stutters go away, does anyone know what exactly is happening to my pc?
Ive tried using 3 different older nvidia drivers but no fix(used DDU in safeboot to uninstall the drivers)

pc specs
Mobo: GIGABYTE B550M DS3H Rev 1.4
CPU: Ryzen 5 5600
GPU: MSI VENTUS RTX 3060 12GB OC
PSU: GIGABYTE P750GM GOLD

also infos that might help: -RTX 3060 is newly bought this week cause I've had some no display/posting issues with my recent gpu GIGABYTE RX 5700XT, and during my time with my old gpu, it would sometimes post after a very long time 5-20 minutes however once it posted, it didn't have the lag and stutters i'm experiencing with my rtx 3060 today and could even play and run stress test with it.
-Ive experienced"Video Internal scheduler error" with my rtx 3060
-(Might be unrelated but)somehow pc wont boot to windows if I dont have all my drives in the boot priority list even though I only have windows in 1 drive.

some people from discord said it might be my Motherboard as it is a bad entry level board, however my board is only 8 months old.
Do you guys think its the Motherboard? or a faulty gpu?

 

[Ralston18]

Reference:

"however everytime I turn the pcie slot config to gen 3 or use the second pcie slot which is gen 3 at default, the lag and stutters go away, does anyone know what exactly is happening to my pc?"

Use Task Manager, Resource Monitor, and Process Explorer (Microsoft, free) to observe system performance.

https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer

Use all three tools but only one tool at a time.

Begin by observing system performance when the system is lagging and stuttering.

Then make the change that cause the lag and stutters to stop. If possible make only one change at a time.

Look for what changes.

You may need to switch back and forth between lag and no lag, etc.. To disccover potential culprits.

Take your time, be methodical, keep notes., Do not jump to any immediate conclusions.

Capture and print screen shots for reference and comparison purposes.

 

[logainofhades]

Get rid of that PSU for a quality unit. That model is a fire hazard, and quite possibly the cause of your instability.

View: https://www.youtube.com/watch?v=aACtT_rzToI