Ryzen 7 5800X + RTX 4060 Ti — 1 year of persistent stutter/DPC latency, all fixes exhausted, need help

[autopilottt]

Hi everyone,

I've been dealing with persistent stutter and frame time spikes for over a year now and I've exhausted almost every fix I can find. I'm hoping someone here can spot something I've missed — I'm at the point where I don't know what else to try.

--- System Specs ---
CPU: AMD Ryzen 7 5800X
GPU: MSI RTX 4060 Ti
RAM: 32GB Kingston Fury Renegade DDR4 3600MHz CL18 (2x16GB)
Motherboard: MSI MAG B550 Tomahawk
PSU: Be Quiet Pure Power 12M
OS: Windows 11
Monitor: Samsung Odyssey G4 240Hz

--- The problem ---
Stutter and frame time spikes occur in CS2 and other games. What's strange is that I can sometimes feel the system isn't fully smooth even on the desktop — not just in games. LatencyMon consistently identifies nvlddmkm.sys as the highest DPC latency source (~856µs peak). CapFrameX confirms all frame time spikes are 100% CPU-sourced.

Key pattern: Stutters are minimal at the start of a session. They get progressively worse after 1-2 matches/hours of play. The same location in a map can run perfectly smooth on one run, then stutter badly on another. This rules out pure shader compilation as the cause.

--- Diagnostics ---
- LatencyMon: nvlddmkm.sys highest DPC (~856µs)
- CapFrameX: all spikes CPU-sourced (not GPU)
- MemTest86: passed (no RAM errors)
- Tested single stick (16GB single channel): same issue

--- Everything I have already tried ---

GPU / NVIDIA:
- Clean driver install with DDU (multiple driver versions tested)
- HAGS: tested both on and off (currently on)
- MSI Mode Utility: GPU set to MSI mode + High priority
- Realtek NIC interrupt moderation reduced via MSI Mode Utility
- NVCP Low Latency Mode: currently Ultra (tested Off/On/Ultra)
- GPU undervolt via MSI Afterburner (~975mV @ 2700MHz)
- MPO disabled via registry

RAM:
- Running XMP/A-XMP (3600 CL18)
- Tested with XMP off (JEDEC 2133)
- tRFC1 manually reduced (991 → 560)
- tRCDRD/tRP corrected to 17
- Single stick test: same result
- MemTest86: passed

BIOS:
- Updated to latest stable version
- C-States disabled
- PBO disabled (tested)
- fTPM: AMD CPU fTPM (no discrete TPM slot on this board), TPM cleared via tpm.msc
- FeatureSettingsOverride = 3 / FeatureSettingsOverrideMask = 3 applied
- AMD Chipset drivers: updated and reinstalled

Windows / Software:
- 30+ clean Windows reinstalls (both Win10 and Win11) — problem persists on both
- Tested on completely fresh Windows with only CS2 installed — same result
- Process Lasso: CS2 set to High priority, tested core affinity options
- ISLC: running with 6GB threshold and 0.5ms timer resolution
- bcdedit: useplatformtick yes, disabledynamictick yes
- Xbox Game Bar disabled via registry
- Task Scheduler cleaned up

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue
- The Ryzen 7 5800X is the only component that has never been swapped

--- My concern ---
I suspect the CPU or motherboard may be faulty at a hardware level, but I'm honestly scared to upgrade. I've already replaced almost every other component and the problem didn't go away — so there's a real fear that even if I buy a new CPU or switch platforms, the stutter might still be there and I'll have spent money for nothing. Before I make that jump, I really want to make sure I haven't missed something fixable.

Has anyone with a similar system found a workaround that actually helped? Or does this symptom pattern point clearly to the CPU being the culprit? Any advice on how to confirm this before spending money would be really appreciated.

Happy to run any diagnostics and post results.

[crack]

Hi everyone,

I've been dealing with persistent stutter and frame time spikes for over a year now and I've exhausted almost every fix I can find. I'm hoping someone here can spot something I've missed — I'm at the point where I don't know what else to try.

--- System Specs ---
CPU: AMD Ryzen 7 5800X
GPU: MSI RTX 4060 Ti
RAM: 32GB Kingston Fury Renegade DDR4 3600MHz CL18 (2x16GB)
Motherboard: MSI MAG B550 Tomahawk
PSU: Be Quiet Pure Power 12M
OS: Windows 11
Monitor: Samsung Odyssey G4 240Hz

--- The problem ---
Stutter and frame time spikes occur in CS2 and other games. What's strange is that I can sometimes feel the system isn't fully smooth even on the desktop — not just in games. LatencyMon consistently identifies nvlddmkm.sys as the highest DPC latency source (~856µs peak). CapFrameX confirms all frame time spikes are 100% CPU-sourced.

Key pattern: Stutters are minimal at the start of a session. They get progressively worse after 1-2 matches/hours of play. The same location in a map can run perfectly smooth on one run, then stutter badly on another. This rules out pure shader compilation as the cause.

--- Diagnostics ---
- LatencyMon: nvlddmkm.sys highest DPC (~856µs)
- CapFrameX: all spikes CPU-sourced (not GPU)
- MemTest86: passed (no RAM errors)
- Tested single stick (16GB single channel): same issue

--- Everything I have already tried ---

GPU / NVIDIA:
- Clean driver install with DDU (multiple driver versions tested)
- HAGS: tested both on and off (currently on)
- MSI Mode Utility: GPU set to MSI mode + High priority
- Realtek NIC interrupt moderation reduced via MSI Mode Utility
- NVCP Low Latency Mode: currently Ultra (tested Off/On/Ultra)
- GPU undervolt via MSI Afterburner (~975mV @ 2700MHz)
- MPO disabled via registry

RAM:
- Running XMP/A-XMP (3600 CL18)
- Tested with XMP off (JEDEC 2133)
- tRFC1 manually reduced (991 → 560)
- tRCDRD/tRP corrected to 17
- Single stick test: same result
- MemTest86: passed

BIOS:
- Updated to latest stable version
- C-States disabled
- PBO disabled (tested)
- fTPM: AMD CPU fTPM (no discrete TPM slot on this board), TPM cleared via tpm.msc
- FeatureSettingsOverride = 3 / FeatureSettingsOverrideMask = 3 applied
- AMD Chipset drivers: updated and reinstalled

Windows / Software:
- 30+ clean Windows reinstalls (both Win10 and Win11) — problem persists on both
- Tested on completely fresh Windows with only CS2 installed — same result
- Process Lasso: CS2 set to High priority, tested core affinity options
- ISLC: running with 6GB threshold and 0.5ms timer resolution
- bcdedit: useplatformtick yes, disabledynamictick yes
- Xbox Game Bar disabled via registry
- Task Scheduler cleaned up

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue
- The Ryzen 7 5800X is the only component that has never been swapped

--- My concern ---
I suspect the CPU or motherboard may be faulty at a hardware level, but I'm honestly scared to upgrade. I've already replaced almost every other component and the problem didn't go away — so there's a real fear that even if I buy a new CPU or switch platforms, the stutter might still be there and I'll have spent money for nothing. Before I make that jump, I really want to make sure I haven't missed something fixable.

Has anyone with a similar system found a workaround that actually helped? Or does this symptom pattern point clearly to the CPU being the culprit? Any advice on how to confirm this before spending money would be really appreciated.

Happy to run any diagnostics and post results.

Run some deathmatch in CS2 with High Definition Audio Controller disabled in BIOS, if problem persists

"bcdedit /set useplatformtick no" and reboot, test again, if problem persists

Disable High precision event timer in device manager, reboot, test again.

If nothing works so far, it's probably a Windows update, you haven't tried Linux so it's still a possibility, I know I had stutters because of a forced Windows update.

Or, wild card, Probalance being the problem with some background processes not playing nice with the feature, I would exclude dwm.exe and csrss.exe (do not mess with csrss.exe priority, highly volatile to stuttering).

[soul4kills]

From you description, sounds like you're being thermally throttled. What's your cooling situation and how are the temps when gaming. Also is your graphics card settings set to maximum performance and your windows power plan set on high performance?

From your description those are your likely culprits.

Some suggestions.

Don't run games on a high process priority. It takes priority away from your inputs and causes stability issues. Process lasso, don't need that. MPO it's okay to keep that on. I have it on and have good latency, and i run my games in borderless windowed fine. Don't touch affinity options, you'll make things worst if you don't know what you're doing. I've tried it out and initially saw latency improvements but then it starts to get bad and unstable. Just leave it to windows, it knows how to manage affinities better than you. bcdedit stuff only works on windows 10. It actually has a negative affect on windows 11 so you should leave it at defaults. HPET disabled in device manager doesn't do anything, doesn't even disable it. It shows up in device manager so your system knows it has it. Leave it how it is.

[kyube]

--- System Specs ---
CPU: AMD Ryzen 7 5800X
GPU: MSI RTX 4060 Ti
RAM: 32GB Kingston Fury Renegade DDR4 3600MHz CL18 (2x16GB)
Motherboard: MSI MAG B550 Tomahawk
PSU: Be Quiet Pure Power 12M


--- The problem ---
Stutter and frame time spikes occur in CS2 and other games. What's strange is that I can sometimes feel the system isn't fully smooth even on the desktop — not just in games. LatencyMon consistently identifies nvlddmkm.sys as the highest DPC latency source (~856µs peak). CapFrameX confirms all frame time spikes are 100% CPU-sourced.

Key pattern: Stutters are minimal at the start of a session. They get progressively worse after 1-2 matches/hours of play. The same location in a map can run perfectly smooth on one run, then stutter badly on another. This rules out pure shader compilation as the cause.

--- Diagnostics ---
- LatencyMon: nvlddmkm.sys highest DPC (~856µs)
- CapFrameX: all spikes CPU-sourced (not GPU)
- MemTest86: passed (no RAM errors)
- Tested single stick (16GB single channel): same issue

- GPU undervolt via MSI Afterburner (~975mV @ 2700MHz)
- MPO disabled via registry

- Process Lasso: CS2 set to High priority, tested core affinity options
- ISLC: running with 6GB threshold and 0.5ms timer resolution

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue
- The Ryzen 7 5800X is the only component that has never been swapped

--- My concern ---
I suspect the CPU or motherboard may be faulty at a hardware level, but I'm honestly scared to upgrade. I've already replaced almost every other component and the problem didn't go away — so there's a real fear that even if I buy a new CPU or switch platforms, the stutter might still be there and I'll have spent money for nothing. Before I make that jump, I really want to make sure I haven't missed something fixable.

Has anyone with a similar system found a workaround that actually helped? Or does this symptom pattern point clearly to the CPU being the culprit? Any advice on how to confirm this before spending money would be really appreciated.

Happy to run any diagnostics and post results.

There's no mention of thermals & SSD used in this system. Your PSU model name doesn't seem to be correct, how many watts does it have?
What specific W11 version did you use? (23h2, 24h2, 25h2, 26h1) Did you try 22H2?
GPU undervolting should be avoided.
What peripherals were being used in this system?
What exact DRAM, mobo, PSU, GPU did you swap to and/or from?
LatencyMon is completely irrelevant for evaluting DPC/ISR performance (see my signature)
ISLC / ProcessLasso are irrelevant as well
Provide the CapFrameX data which you've mentioned here.

A hardware issue can be very likely the case, but more data is necessary.
Do you have a system or recall a time where you didn't have such issues in CS2?

[autopilottt]

Hi everyone,

I've been dealing with persistent stutter and frame time spikes for over a year now and I've exhausted almost every fix I can find. I'm hoping someone here can spot something I've missed — I'm at the point where I don't know what else to try.

--- System Specs ---
CPU: AMD Ryzen 7 5800X
GPU: MSI RTX 4060 Ti
RAM: 32GB Kingston Fury Renegade DDR4 3600MHz CL18 (2x16GB)
Motherboard: MSI MAG B550 Tomahawk
PSU: Be Quiet Pure Power 12M
OS: Windows 11
Monitor: Samsung Odyssey G4 240Hz

--- The problem ---
Stutter and frame time spikes occur in CS2 and other games. What's strange is that I can sometimes feel the system isn't fully smooth even on the desktop — not just in games. LatencyMon consistently identifies nvlddmkm.sys as the highest DPC latency source (~856µs peak). CapFrameX confirms all frame time spikes are 100% CPU-sourced.

Key pattern: Stutters are minimal at the start of a session. They get progressively worse after 1-2 matches/hours of play. The same location in a map can run perfectly smooth on one run, then stutter badly on another. This rules out pure shader compilation as the cause.

--- Diagnostics ---
- LatencyMon: nvlddmkm.sys highest DPC (~856µs)
- CapFrameX: all spikes CPU-sourced (not GPU)
- MemTest86: passed (no RAM errors)
- Tested single stick (16GB single channel): same issue

--- Everything I have already tried ---

GPU / NVIDIA:
- Clean driver install with DDU (multiple driver versions tested)
- HAGS: tested both on and off (currently on)
- MSI Mode Utility: GPU set to MSI mode + High priority
- Realtek NIC interrupt moderation reduced via MSI Mode Utility
- NVCP Low Latency Mode: currently Ultra (tested Off/On/Ultra)
- GPU undervolt via MSI Afterburner (~975mV @ 2700MHz)
- MPO disabled via registry

RAM:
- Running XMP/A-XMP (3600 CL18)
- Tested with XMP off (JEDEC 2133)
- tRFC1 manually reduced (991 → 560)
- tRCDRD/tRP corrected to 17
- Single stick test: same result
- MemTest86: passed

BIOS:
- Updated to latest stable version
- C-States disabled
- PBO disabled (tested)
- fTPM: AMD CPU fTPM (no discrete TPM slot on this board), TPM cleared via tpm.msc
- FeatureSettingsOverride = 3 / FeatureSettingsOverrideMask = 3 applied
- AMD Chipset drivers: updated and reinstalled

Windows / Software:
- 30+ clean Windows reinstalls (both Win10 and Win11) — problem persists on both
- Tested on completely fresh Windows with only CS2 installed — same result
- Process Lasso: CS2 set to High priority, tested core affinity options
- ISLC: running with 6GB threshold and 0.5ms timer resolution
- bcdedit: useplatformtick yes, disabledynamictick yes
- Xbox Game Bar disabled via registry
- Task Scheduler cleaned up

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue
- The Ryzen 7 5800X is the only component that has never been swapped

--- My concern ---
I suspect the CPU or motherboard may be faulty at a hardware level, but I'm honestly scared to upgrade. I've already replaced almost every other component and the problem didn't go away — so there's a real fear that even if I buy a new CPU or switch platforms, the stutter might still be there and I'll have spent money for nothing. Before I make that jump, I really want to make sure I haven't missed something fixable.

Has anyone with a similar system found a workaround that actually helped? Or does this symptom pattern point clearly to the CPU being the culprit? Any advice on how to confirm this before spending money would be really appreciated.

Happy to run any diagnostics and post results.

Run some deathmatch in CS2 with High Definition Audio Controller disabled in BIOS, if problem persists

"bcdedit /set useplatformtick no" and reboot, test again, if problem persists

Disable High precision event timer in device manager, reboot, test again.

If nothing works so far, it's probably a Windows update, you haven't tried Linux so it's still a possibility, I know I had stutters because of a forced Windows update.

Or, wild card, Probalance being the problem with some background processes not playing nice with the feature, I would exclude dwm.exe and csrss.exe (do not mess with csrss.exe priority, highly volatile to stuttering).

Thanks for the suggestions, I tested all of them:

HD Audio disabled in BIOS — stutter persists
bcdedit /set useplatformtick no — no change
HPET disabled in Device Manager — no change
dwm.exe and csrss.exe were already excluded from ProBalance

None of these made any difference unfortunately. Linux is something I haven't tried yet — I'm planning a clean Windows 26H1 install first, if that doesn't help either, Linux might be worth testing.

[autopilottt]

From you description, sounds like you're being thermally throttled. What's your cooling situation and how are the temps when gaming. Also is your graphics card settings set to maximum performance and your windows power plan set on high performance?

From your description those are your likely culprits.

Some suggestions.

Don't run games on a high process priority. It takes priority away from your inputs and causes stability issues. Process lasso, don't need that. MPO it's okay to keep that on. I have it on and have good latency, and i run my games in borderless windowed fine. Don't touch affinity options, you'll make things worst if you don't know what you're doing. I've tried it out and initially saw latency improvements but then it starts to get bad and unstable. Just leave it to windows, it knows how to manage affinities better than you. bcdedit stuff only works on windows 10. It actually has a negative affect on windows 11 so you should leave it at defaults. HPET disabled in device manager doesn't do anything, doesn't even disable it. It shows up in device manager so your system knows it has it. Leave it how it is.

Thanks for the suggestions. To answer your questions:
Temps are fine — CPU maxes out at around 83°C under full load (Cinebench), lower during gaming. No thermal throttling. GPU temps are also normal.
Regarding your suggestions — you're right about several things. I've already reverted the bcdedit settings back to defaults since I'm on Windows 11. I'll also remove the high process priority from CS2 in Process Lasso and stop using affinity settings. MPO I'll leave on as you suggested.
However the stutter isn't just in games — I can sometimes feel it on the desktop too, which makes me think it's not purely a game optimization issue. Temps and power plan are not the culprit here.

[autopilottt]

--- System Specs ---
CPU: AMD Ryzen 7 5800X
GPU: MSI RTX 4060 Ti
RAM: 32GB Kingston Fury Renegade DDR4 3600MHz CL18 (2x16GB)
Motherboard: MSI MAG B550 Tomahawk
PSU: Be Quiet Pure Power 12M


--- The problem ---
Stutter and frame time spikes occur in CS2 and other games. What's strange is that I can sometimes feel the system isn't fully smooth even on the desktop — not just in games. LatencyMon consistently identifies nvlddmkm.sys as the highest DPC latency source (~856µs peak). CapFrameX confirms all frame time spikes are 100% CPU-sourced.

Key pattern: Stutters are minimal at the start of a session. They get progressively worse after 1-2 matches/hours of play. The same location in a map can run perfectly smooth on one run, then stutter badly on another. This rules out pure shader compilation as the cause.

--- Diagnostics ---
- LatencyMon: nvlddmkm.sys highest DPC (~856µs)
- CapFrameX: all spikes CPU-sourced (not GPU)
- MemTest86: passed (no RAM errors)
- Tested single stick (16GB single channel): same issue

- GPU undervolt via MSI Afterburner (~975mV @ 2700MHz)
- MPO disabled via registry

- Process Lasso: CS2 set to High priority, tested core affinity options
- ISLC: running with 6GB threshold and 0.5ms timer resolution

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue
- The Ryzen 7 5800X is the only component that has never been swapped

--- My concern ---
I suspect the CPU or motherboard may be faulty at a hardware level, but I'm honestly scared to upgrade. I've already replaced almost every other component and the problem didn't go away — so there's a real fear that even if I buy a new CPU or switch platforms, the stutter might still be there and I'll have spent money for nothing. Before I make that jump, I really want to make sure I haven't missed something fixable.

Has anyone with a similar system found a workaround that actually helped? Or does this symptom pattern point clearly to the CPU being the culprit? Any advice on how to confirm this before spending money would be really appreciated.

Happy to run any diagnostics and post results.

There's no mention of thermals & SSD used in this system. Your PSU model name doesn't seem to be correct, how many watts does it have?
What specific W11 version did you use? (23h2, 24h2, 25h2, 26h1) Did you try 22H2?
GPU undervolting should be avoided.
What peripherals were being used in this system?
What exact DRAM, mobo, PSU, GPU did you swap to and/or from?
LatencyMon is completely irrelevant for evaluting DPC/ISR performance (see my signature)
ISLC / ProcessLasso are irrelevant as well
Provide the CapFrameX data which you've mentioned here.

A hardware issue can be very likely the case, but more data is necessary.
Do you have a system or recall a time where you didn't have such issues in CS2?

Thanks for the detailed questions, I'll answer each one:

Thermals & SSD:
- SSD: Kingston KC3000 1TB (NVMe)
- CPU temps during gaming: max ~83°C under full load (Cinebench), typically lower in games. No thermal throttling observed.
- GPU temps are normal, no throttling on GPU side either.

PSU:
- be quiet! Pure Power 12 M 750W (fully modular). Sorry for the confusion in the original post.

Windows versions tested:
- Tested on 22H2, 23H2, 24H2, 25H2 — issue persists on all of them.
- Have not tried 26H1 yet, planning to do a clean install with it soon and leave settings at defaults this time.

GPU undervolting:
- I saw it recommended in a YouTube video for more stable frametimes. I tried it but it made no difference to the stutter. I'll remove the undervolt going forward since you're advising against it.

Peripherals:
- Mouse: Razer DeathAdder V3
- Keyboard: Motospeed CK61
- Headset: HyperX Cloud 2 (connected via USB)

Full hardware history (what was swapped):

Original build:
- Motherboard: ASUS Prime B550-Plus
- GPU: Gigabyte RTX 3060 12GB OC
- RAM: G.Skill Aegis DDR4 3200MHz 2x8GB (16GB)
- PSU: Corsair CX650 650W
- CPU: Ryzen 7 5800X (unchanged throughout)
- Cooler: Deepcool AG400

Current build (parts replaced one by one, issue persisted after each swap):
- Motherboard: MSI MAG B550 Tomahawk
- GPU: MSI RTX 4060 Ti
- RAM: Kingston Fury Renegade DDR4 3600MHz CL18 2x16GB (32GB)
- PSU: be quiet! Pure Power 12 M 750W
- CPU: Ryzen 7 5800X (still the same unit, never replaced)
- Cooler: Deepcool AG400 (same)

LatencyMon / ISLC / Process Lasso:
Noted — I'll check your signature for the correct diagnostic approach. I used LatencyMon because it was commonly recommended but I understand it may not be accurate for DPC/ISR evaluation.

CapframeX data:

Screenshot 2026-04-02 155200.png (135.28 KiB) Viewed 5723 times

Screenshot 2026-04-02 155200.png (135.28 KiB) Viewed 5723 times

Screenshot 2026-04-02 155531.png (147.13 KiB) Viewed 5721 times

[Cosmostraveler]

--- System Specs ---
CPU: AMD Ryzen 7 5800X
GPU: MSI RTX 4060 Ti
RAM: 32GB Kingston Fury Renegade DDR4 3600MHz CL18 (2x16GB)
Motherboard: MSI MAG B550 Tomahawk
PSU: Be Quiet Pure Power 12M


--- The problem ---
Stutter and frame time spikes occur in CS2 and other games. What's strange is that I can sometimes feel the system isn't fully smooth even on the desktop — not just in games. LatencyMon consistently identifies nvlddmkm.sys as the highest DPC latency source (~856µs peak). CapFrameX confirms all frame time spikes are 100% CPU-sourced.

Key pattern: Stutters are minimal at the start of a session. They get progressively worse after 1-2 matches/hours of play. The same location in a map can run perfectly smooth on one run, then stutter badly on another. This rules out pure shader compilation as the cause.

--- Diagnostics ---
- LatencyMon: nvlddmkm.sys highest DPC (~856µs)
- CapFrameX: all spikes CPU-sourced (not GPU)
- MemTest86: passed (no RAM errors)
- Tested single stick (16GB single channel): same issue

- GPU undervolt via MSI Afterburner (~975mV @ 2700MHz)
- MPO disabled via registry

- Process Lasso: CS2 set to High priority, tested core affinity options
- ISLC: running with 6GB threshold and 0.5ms timer resolution

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue
- The Ryzen 7 5800X is the only component that has never been swapped

--- My concern ---
I suspect the CPU or motherboard may be faulty at a hardware level, but I'm honestly scared to upgrade. I've already replaced almost every other component and the problem didn't go away — so there's a real fear that even if I buy a new CPU or switch platforms, the stutter might still be there and I'll have spent money for nothing. Before I make that jump, I really want to make sure I haven't missed something fixable.

Has anyone with a similar system found a workaround that actually helped? Or does this symptom pattern point clearly to the CPU being the culprit? Any advice on how to confirm this before spending money would be really appreciated.

Happy to run any diagnostics and post results.

There's no mention of thermals & SSD used in this system. Your PSU model name doesn't seem to be correct, how many watts does it have?
What specific W11 version did you use? (23h2, 24h2, 25h2, 26h1) Did you try 22H2?
GPU undervolting should be avoided.
What peripherals were being used in this system?
What exact DRAM, mobo, PSU, GPU did you swap to and/or from?
LatencyMon is completely irrelevant for evaluting DPC/ISR performance (see my signature)
ISLC / ProcessLasso are irrelevant as well
Provide the CapFrameX data which you've mentioned here.

A hardware issue can be very likely the case, but more data is necessary.
Do you have a system or recall a time where you didn't have such issues in CS2?

Hey Kyube, I know you are a veteran and have vast knowledge about hardware and how it compiles later on to a gaming experience.

Do you have any PSU recommendations? My budget would be around 120-180 euros. Current GPU is 3080, R5 5600. If I ever upgrade, at most it will be medium build.

[soul4kills]

Your setup is not too far off from mine. MSI motherboard, 5900x, rtx2060, 2x 16gb 3200 corsair vengence. And my latency is great and I have a bunch of things open while i am gaming too. I like to watch videos/streams when I'm gaming.

Have you tried disabling immou & svm in bios to see if that helps? Those are Hypervisor/Virtual Machine settings. It disables core isolation. But core isolation is needed by some anti cheats. Core isolation adds a significant amount of input latency.

Both CPPC settings on auto? I have mine on auto.

It's possible a bad usb device can be causing your issues. Try unplugging all your devices aside from your mouse and keys.

Side note, other people say latencymon is not accurate. But for some context even if it's not accurate, it's good enough to show you what drivers are misbehaving. I've used it and that's been the case for me in solving my latency issues. ISLC, I use it and it helps greatly to get timer resolution down. Wanted to add another point of view so you can decide whats best for yourself.

It was discussed here with screenshots in several different posts.
viewtopic.php?p=121174#p121189

[MK92]

This:

Hardware swaps (components replaced over the past year):
- GPU replaced: same issue
- RAM replaced: same issue
- PSU replaced: same issue
- Motherboard replaced: same issue

And this:

However the stutter isn't just in games — I can sometimes feel it on the desktop too

And people would keep on suggesting some USELESS software tweaks, useless bcdedit CMD commands, power plans and bullcrap like that?

Your issue origins from your wall socket, not in software or hardware, just like in 90% of cases on this forum...people just refuse to accept the real culprit because its mostly unfixable.