Question DPC Spikes, System / Audio stutter on new AMD Ryzen 9950X3D build.

[nesretto]

Hello!
So I've recently switched over to AMD from Intel 14900k.

ROG STRIX X870E-E GAMING WIFI​

Parts:
BIOS: 1605
CPU: AMD 9950X3D
CPU cooler: NZXT Kraken Elite 360 AIO
Motherboard: X870E ASUS ROG STRIX-E Gaming Wifi
Ram: G.Skill Trident Z5 NEO CL30 60000MHz 64GB EXPO
SSD/HDD: Samsung 990 PRO 2TB
GPU: MSI RTX 4080 Gaming X Trio
PSU: Corsair RM1000e (from Oct 2023)
Chassis: NZXT H7
OS: Windows 11 Home 24H2
Monitor: ASUS PG279Q

After waiting for the Code 15 memory without interrupting it, it landed me on QCODE "D6" after waiting for a few minutes i tried to boot a second time and this time it booted right up. I've found out later this might be an issue with the G Sync display I was using at the time. If i flash BIOS and try with this display it always gives me D6 at first. With my second monitor there is no such issues. Anyways... The computer is working great, all benchmarks are where they should be. no crashes or nothing like that. I've also updated to the newest bios everytime they are available. But im having one annoying issue, that i cannot figure out.

ISSUE:
Everytime I first boot into windows the computer will freeze for like 1, 2 seconds and then recover. the mouse and everything will freeze. This happens if i login and wait for certain programs to launch or i can 100% force it to happen by opening Display Settings right after login. If i do this, then none of the problems will cause this hitch on start up. If the display turns off or computer goes to sleep it will happen again when lauching certain programs like Spotify or Fan Control. (I think this has to do with certain UI elements) Also when this happens it will cause massive DPC spikes and audio cut offs. My friends on Discord have noticed my Shure SM7B connected via Wave XLR will actually distort when this happens. (It will happen even without this device connected). This was not happening on my previous intel build, with the same monitors, same gpu, same displayport cables. But the only way to fix it on this computer is to run HDMI. If im connecting HDMI be it through GPU, Internal Graphics the issue is completly resolved. The only way to fix this issue on DisplayPort is to use:

Custom Resolution Utility and Scaled Resolution Editor by ToastyX and delete all the unused resolutions.
If I do this, then the issue will be completly gone. But i'm still left wondering why this is an issue on this AMD build. When it was completly fine on my Intel. I first thought it was related to the recent NVIDIA driver issues but even reverting back to the oldest drivers for my GPU will not fix the issue.

What ive tried:

1. All sorts of Nvidia Drivers.
2. Windows 11, Windows 10 multiple fresh installs.
3. Multiple Chipset drivers.
4. Disabling all features not in use (Wifi, USB4, LAN, Bluetooth etc
5. Disabling all power saving features in bios and windows.
6. Multiple displays and displayport cable combinations.
7. Different RAM.
8. Different GPU (GTX 1060)
9. DIfferent PSU with both the corsair 12VHPPWR cable or the 3x-4x PCIE with NVIDIA adapter.
10. Reseating all power connectors on MOBO and PSU.
11. Disconnecting all USB devices, using different keyboard / mouse.
12. Only using 1 display with a fresh windows install inbetween. tried both displays with different display cables doing this.
13. Disabling EXPO
14. No PBO / Undervolt.

The only way to not have this hitching is:
Safe Mode where NVIDIA Driver is not present.
HDMI Cable either via GPU or internal graphics.

At this point I'm completly lost. I should not have to disable all possible resolutions on my displays.. We are talking about a Ryzen 9 9950X3D so how its hitching because it has to load some resolutions is after boot is beyond me.. At this point im just wondering if there is anyone else out there having these issues, or if im alone.

I really don't want to fork out for a new mobo and have the same issue be present. I would also think that if this was a HW issue then it would cause some sort of BSOD or hard freezes. Computer is "stable", even left it over night doing Aida64.

Sorry for the rant post, any ideas would be greatly appreciated! 🙂

 

[Hellfire13]

The simplest explanation for a problem is sometimes usually the correct one.

Since you have tried all other possible solutions, you have to test it with what is left to test with, the mobo and cpu. No need to get new, you can just take it to a shop and test with spares.

 

[Lutfij]

Welcome to the forums, newcomer!

Windows 11, Windows 10 multiple fresh installs.
Where did you source the installer for the OS? Installing the OS in offline mode, to manually install all relevant drivers with the latest versions in an elevated command?

For the sake of relevance, which BIOS version are you currently on?

NEW Parts:
MOBO: X870E ROG STRIX - E
CPU: AMD 9950X3D
RAM: G.Skill Trident Z5 NEO 6000 CL30, 64GB (F5-6000J3040G32GX2-TZ5NR)
GPU: MSI RTX 4080 Gaming X Trio (From previous build)
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. Please include a list of parts you've also used for troubleshooting.

Nvidia have bee undergoing some driver issues for a while. I would still try and do the following;
Go into BIOS, disable iGPU, use DDU in Safe Mode to remove all GPU drivers(Intel, AMD and Nvidia) then manually install driver version 566.36(as a start) in an elevated command, i.e, Right click installer>Run as Administrator.

 

[nesretto]

Welcome to the forums, newcomer!

Windows 11, Windows 10 multiple fresh installs.
Where did you source the installer for the OS? Installing the OS in offline mode, to manually install all relevant drivers with the latest versions in an elevated command?

For the sake of relevance, which BIOS version are you currently on?

NEW Parts:
MOBO: X870E ROG STRIX - E
CPU: AMD 9950X3D
RAM: G.Skill Trident Z5 NEO 6000 CL30, 64GB (F5-6000J3040G32GX2-TZ5NR)
GPU: MSI RTX 4080 Gaming X Trio (From previous build)
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. Please include a list of parts you've also used for troubleshooting.

Nvidia have bee undergoing some driver issues for a while. I would still try and do the following;
Go into BIOS, disable iGPU, use DDU in Safe Mode to remove all GPU drivers(Intel, AMD and Nvidia) then manually install driver version 566.36(as a start) in an elevated command, i.e, Right click installer>Run as Administrator.

Hello good sir, I have now updated the parts list, sorry about that.
To your question:

BIOS:
I'm on the newest BIOS: 1605. I did try going back to 1512 using flash bios button on the rear (i've heard some people having issues with the EZ Flash feature within the BIOS itself)

Drivers:
I have tried both skipping OOBE while offline and installing all the drivers before ever connecting to the internet. I tried this both with the ASUS chipset drivers and the newest one from AMD. Nvidia driver 566.36 is among the once I did try, both studio and game ready version. I also tried using NVCleaninstall with and without "Disable Multiplane Overlay" option. I also always disconnect from internet and go into Safe Mode when uninstalling NVIDIA drivers using DDU. Only connecting to internet after installing the new driver.

IGPU:
I keep this disabled, however for the sake of testing i did try a fresh offline install with this both enabled or disabled.

It's so wierd how removing the resolutions using CRU and SRE makes the stutter when entering display settings go away. It also seems to remove the DPC latency spikes that makes audio stutter.
I know the RTX 4080 uses Displayport 1.4, however my monitor says it only requires Displayport 1.2 so i don't know if there could be a DSC problem. That should only be a think on Displayport 1.4 and beyond I belive... However I do not know what sort of Displayports I'm currently using. So I did go ahead and order a couple of VESA-Certified 2.1 DisplayPort cables (DP40, UHBR10).

I have never experienced bad cables causing stutters when loading resolutions. I mostly experienced black flickering on bad cables before. And the cables were not an issue on my old build. Also having two cables not working with either display seperatly seems kind of unlikley... However I do now know their quality or what DP version they are, So to elimitate it as a problem I figured I would buy some new ones.

I also never experience a HW fault with mobo cause this sort of problem. I've tested the system in so many different ways and there is never a freeze, BSOD or anything like that.. Also tested all the USB ports including USB 4.0 and they all seem to be working correctly. All PCI-e devices have been set to correct gen speed manually in BIOS too. However I did try putting it to Gen 3 to see if would eliminate the hitching after login, no dice.