Fps drops, frametime spikes, stutter/ hitching with capable pc

[VenomLolo]

Same...But on all devices (PS5, IPHONE 12, PC, MACBOOK)
I tried everything.... In my case its electricity/EMI...Probably

Wow! thats quite harsh! I actually do not know if this situation is EMI related in my house, I really hope not because this only happens when gaming.

Look at my post (Electrical Issues Affecting Latency -- Interference, EMI, EMF) i live near power pole. All of my desktops stutters - what about other desktops in your home? (if u have any)

Well in my country there are lots of light poles but I'm also close a powerpole like not that close but close. And we'll this is the only desktop in my house so I have no other references

[Thatweirdinputlag]

I wish I could give you a magical bullet that would help with this, there's none sadly =/ !!
However, I saw that you have MSI Afterburner, have you tried to disable GPU power monitoring? or just try to run the game without MSI afterburner in the background and see how it goes.
Other than that, I remember I had similar stutters before, and it was when I was trying out Nvidia "Adaptive mode" power option from Nvidia's control panel, just to see how it relates to my GPU's frequency and what not! What i realized there that it was actually causing alot of the times the PEG speed or PCIe mode to fluctuate between x1, x2 and x3 and that caused alot of hard stutters and hitches that were not even visible on the FPS graph. Try to just set them to a specific value, and if you're using a riser cable, try without that too.
And for the record, its normal for 1 core or multiple cores to hit that high usage when loading a game. I thought your CPU usage was hitting 90% during gaming.
P.S what I do now with nvidia's power option is to set it to power saving mode, and in afterburner I force it to run at 1770freq all the time with fans at 50% "for my case i play Valorant and it really is not gpu intensive at all". The reason for this is i suspect my riser cable has a problem with switching frequencies and modes, and thats why I was having the weird stutters that I never had before, or it was actually because of some bad windows 11 thing going on. I'm not sure really, but for now this is working for me!

Let me know how it goes, and for reference, I am by far not a professional when it comes to troubleshooting, but ive had my experiences and thats why i decided to share! Best of luck

Thank you for your words I really appreciate them! I use Afterburner and also have PX1, I have uninstalled PX1 and AB but stutters are still there the same, one of the latest things Im trying to fix this is using RTSS SCANLINE SYNC with NVCP Fast Sync set, Sorry I did not understand what you are trying to explain in regards to this little section "What i realized there that it was actually causing alot of the times the PEG speed or PCIe mode to fluctuate between x1, x2 and x3 and that caused alot of hard stutters and hitches that were not even visible on the FPS graph. Try to just set them to a specific value" What I normally do is set vsync on nvcp and 141 on RTSS but well now im trying to use the other option of RTSS that is scanline sync to see if this helps me a little. Thank goodness no my cpu is not reaching 90% but only when loading a game like into the menu or from lobby to game. I have also tried without the gpu power monitoring I could try again now that Im trying out the scanline sync.

Sorry for the late reply! depending on your board, you might be able to switch the PRG Port speeds, i read on a forum that if you let it stay at auto then it will default to x1 instead of x3. For my asus board i set it on x3 manually and also set the pcie on x3.
This might be a long shot too, but it really helped out with my stutters. Voltages that are always overlooked in the motherboard are vccio vcssa and the PCH core. now for me if i set everything to auto, it will set io and sa extremely hight, at around 1.45 each, now I do own a pair of 4000cl15 but those numbers are really high, so i set them manually to 1.25 both. and i actually reduce the PCH core voltage to the minimum allowed 0.9 instead of 1.05 "1.07 on hwinfo". That alone with interrupt moderation rate "Ethernet settings" makes or breaks my game. If i set the interrupt moderation rate at OFF, I can feel the stutters hit whenever there's alot going on. So i either set it to medium or high. I never leave it to adaptive either..
See how those options help.
I have intel 9900KS 5.0 all core HT enabled, 2080TI, and fiber internet. Thought the info might help! let me know if you have more questions..
Test those things out, see what works best for you