stutter, lag, Robot voice.... 90% ROG Components

[xverso]

Hey thats my first Post in this forum.
First sorry for my english, im from Germany.
i Managed to build a new Pc and i got some misteryous problem with it.
when i start the Pc, sometime everything is lagging... Mouse, Windows and my Voice becomes like a robot..
sometime it happens after a few hour i start and sometime directly. when i restart the Pc everything is working fine again.
i tried in other forums but nobody could help me.
so here my specs
Rog Helios Case
Ryzen 3950x
Gskill 3600Mhz 32 Gb
Geforce 2080ti Zotac
X570 Crosshair VIII Formula
CPU cooler Rog Strix LC360
Power Supply Rog Strix 750W
2x nvme m2 each 1TB Space

what i tried till now
new windows,power shell restore windows
new Rams, new Mainboard (had Rog Srix-E before)
new chipset driver

[liakou]

What you experience are DPC latency issues and you're getting USB dropouts.
Have you made any particular changes in the BIOS?
Is your memory coupled with the CPU fabric clock?
Maybe you could get a screenshot from Ryzen Master home page and post it here.

[xverso]

liakou wrote:
What you experience are DPC latency issues and you're getting USB dropouts.
Have you made any particular changes in the BIOS?
Is your memory coupled with the CPU fabric clock?
Maybe you could get a screenshot from Ryzen Master home page and post it here.

@liakou no i changed only the Ram Oc to XMP because the mainboard recognize only 2133 MHZ
CPU is Stock

[liakou]

Alright. Your Fabric clock is coupled with the memory clock so you're good there.
One suggestion. Try playing with your CLDO VDDG voltage a bit. Under Extreme Tweaker if you haven't messed with it, it's probably set on AUTO, set it manual and try between the following voltage settings, @1.0v, 1.05v or 0.950v.
Start @1.0 and depending what happens try going either higher, or lower and check your issue again.
When I experienced similar issues once on my Crosshair 7 X470, I found out eventually that my latency issue was caused by VDDG voltage, being either high, or even low.
Also in your UEFI click on Search located on top and type "Global", you should find the setting Global C-State Control, set it to Enabled instead of AUTO.

[xverso]

i Think The problem was the Amd sata driver, my windows is running with a NVME Partition, i got no Dpc latency problem since Yesterday.. i just deactivated the ports.