Question RTX 4080 performing badly. Possible power draw issues?

[idontlikejava]

Hello all, I somewhat recently upgraded to a RTX 4080 and I noticed worse performance than the GPU I upgraded from, which was a RX 580. Playing games like LoL I would notice in the game when minions hadn't spawned and not much is going on I can get 200-300 FPS (I play all games at 1440p, 165hz), but when minions spawn and the game gets going it drops to 100-160. I notice lacking performance in various other games too, and some times GPU utilization isn't very high. I took HWiNFO64 logs and attached them, I was playing a LoL game during the log.

I would appreciate any help or input from the community. Thanks guys.

Spec List:
EVGA 750G+ 80+ Gold 750W
PNY RTX 4080
i9-10900X
32GB DDR4 3200
ASUS Prime x299-deluxe ii Motherboard


Log:
https://file.io/ciB1EOjfdrsu

 

[Lutfij]

Welcome to the forums, newcomer!

EVGA 750G+ 80+ Gold 750W
How old is the PSU in your build?

 

[idontlikejava]

Welcome to the forums, newcomer!

EVGA 750G+ 80+ Gold 750W
How old is the PSU in your build?

Thank you. I would say its roughly 2 years old at this point.

 

[idontlikejava]

I'll continue exploring options on my own and posting updates here for anyone who may have this issue in the future.

I ran 3DMark and got decent results:

So this leads me to believe that there must be some software issue causing low performance and utilization in games like LoL.

EDIT:
My next test involved running League of Legends practice tool in full-screen exclusive, medium graphics settings, frame rate uncapped.

When launching the match initially these are my stats:

After standing still and using the practice tool forward time by 10 minute function, these are the results:

 

[idontlikejava]

Recently upgraded to a RM1000e PSU, hoping it would solve this issue, but no luck.

 

[rcald2000]

Have you run DDU (Display Drivers Uninstaller) to completely remove the old AMD GPU drivers, and reinstalled the latest Nvidia graphics drivers? Also while you're at it, it wouldn't be a bad idea to update the BIOS, and Intel management engine (which includes the chipset drivers).