Incorrect FPS showcase and stuttering while gaming

[Futari Lollies]

I've had my PC since 2017 or 2018 around August. The issue started occuring when recently I bought a Gigabyte 8GB OC RTX 3070 from novatech.co.uk and installed it, my previous GPU was a Gigabyte 4GB GTX 1050ti. At first I found it weird when steam would show my in-game fps being 40-50 while the game feels smoother to 80-120 fps, however it would occur randomly that a stuttering would happen where the fps would show as 20-30 but it'll feel like 5-10.
The specs are:
 Windows 10 (think home edition) 64bit - build 19041.746
 PSU - Enigma 750W
 ASUSTeK ROG STRIX X370-F Gaming 
 AMD Ryzen 7 1700x (untouched)
 WDBlue 1TB 7200rpm HDD (3) 
 Toshiba 1TB 7200rpm HDD 
 Kingston RBU 250gb m.2 SSD (windows installed here)
 Nvidia RTX 3070 
 G Skill Ripjaws V 16GB (4x4) F4-2400C15-4GVR @ 2400MHz (used to run on 2133 speed, changed it to 2400 speed today, prior to the change the stuttering and different fps were present)
 Uefi Bios - American Megatrends Inc. 0402, 6/19/2017 (will try updating, but i'm not sure if there's newer versions, whenever I find something along those lines it kind-of feels sketchy for me)
The games on which I notice such fps issues are: 7 Days to Die (stuttering occasionally and showcases lower fps than what it feels like), Valheim (showcases lower fps than what it feels like), League of Legends (stuttering rarely)
Previously with the old GPU 7 Days to die used to run with max 4 gigs of ram, now the game runs with all available memory on my pc.
I think that I might need a PSU change to higher wattage, but before that I'd need to definitely change my ram to 32 gig @ 3200 mhz and grab a m.2 ssd for steam library games only

[2FA]

I recommend uninstalling your Nvidia drivers using Dispay Driver Uninstaller and installing fresh. Your PSU is way overkill already.

[Moonzy]

did you update your driver, at least?

461.40 seems to be the newest driver

[Futari Lollies]

44 minutes ago, 2FA said:

I recommend uninstalling your Nvidia drivers using Dispay Driver Uninstaller and installing fresh. Your PSU is way overkill already.

Understood, will use that application to do that and do I re-install it from nvidia?

 

39 minutes ago, Moonzy said:

did you update your driver, at least?

461.40 seems to be the newest driver

Yes, after installing the new GPU that was one of the first things I did.

[2FA]

10 minutes ago, Futari Lollies said:

Understood, will use that application to do that and do I re-install it from nvidia?

Yeah just download from Nvidia after using that application. Sometimes there are issues when you upgrade a GPU and don't do a complete reinstall of the drivers.

[Futari Lollies]

1 minute ago, 2FA said:

Yeah just download from Nvidia after using that application. Sometimes there are issues when you upgrade a GPU and don't do a complete reinstall of the drivers.

By that which options should I use, default (let it automatically do its own thing?) or advanced/manual?

[2FA]

1 minute ago, Futari Lollies said:

By that which options should I use, default (let it automatically do its own thing?) or advanced/manual?

For what, the driver installer?

[Futari Lollies]

Just now, 2FA said:

For what, the driver installer?

Yeah the nvidia one, as I have the driver installer on my pc still.

[2FA]

4 minutes ago, Futari Lollies said:

Yeah the nvidia one, as I have the driver installer on my pc still.

Once you use the clean and restart option of DisplayDriverUninstaller (https://www.wagnardsoft.com/), you can just do the default for the nvidia driver installer.

[Futari Lollies]

52 minutes ago, 2FA said:

Once you use the clean and restart option of DisplayDriverUninstaller (https://www.wagnardsoft.com/), you can just do the default for the nvidia driver installer.

Okay, definitely the issue was resolved after I performed a clean removal of my drives with DDU and reinstalled them, I wasn't expecting this and definitely was the first time I had such issue, thank you!