I would first focus on the gpu problem and I would go to your motherboard vendors website and update the motherboard sound driver:
\SystemRoot\system32\drivers\RTKVHD64.sys Tue May 14 04:25:05 2019
B450M DS3H (rev. 1.x) Support | Motherboard - GIGABYTE Global
you have two drivers running that I would not expect:
\SystemRoot\System32\DriverStore\FileRepository\rogkb.inf_amd64_ea00e966860eda9e\ROGKB.sys Fri Oct 1 02:18:09 2021 (6156D251)
\SystemRoot\System32\DriverStore\FileRepository\rogms.inf_amd64_34b5d89d478f54cb\ROGMS.sys Fri Oct 1 02:18:26 2021 (6156D262)
you should find out what these drivers are. when I tried to look them up it looked like some ASUS drivers for firmware updates. This would be unexpected for a gigabyte motherboard.
you might consider removing them with autoruns64.
Autoruns for Windows - Windows Sysinternals | Microsoft Docs
you have some verifier flags set in the most current memory dump.
you should turn them off by running
verifier.exe /reset
note: most current bugcheck did not have modified windows core drivers.
There are other issues with your system, IE you need to update the bios and motherboard drivers to the current version. I think the graphics problem is likely to have been caused by a known bug in the motherboard sound driver.
if rogkb.sys is a firmware update tool it should be removed after you do your firmware update.
--------------------
most current bucheck:
access violation, some verifier flags enabled.
ROGKB.sys loaded (unexpected, listed as a firmware update tool)
second bugcheck:
buffer overrun in graphics driver
3rd bugcheck:
bad instruction pointer running graphics driver
(checksums removed from core windows files)
-----------
2: kd> !sysinfo machineid
Machine ID Information [From Smbios 3.2, DMIVersion 0, Size=2383]
BiosMajorRelease = 5
BiosMinorRelease = 14
BiosVendor = American Megatrends Inc.
BiosVersion = F50
BiosReleaseDate = 11/27/2019
SystemManufacturer = Gigabyte Technology Co., Ltd.
SystemProductName = B450M DS3H
SystemFamily = Default string
SystemVersion = Default string
SystemSKU = Default string
BaseBoardManufacturer = Gigabyte Technology Co., Ltd.
BaseBoardProduct = B450M DS3H-CF
BaseBoardVersion = x.x
2: kd> !sysinfo cpuinfo
[CPU Information]
~MHz = REG_DWORD 3693
Component Information = REG_BINARY 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Configuration Data = REG_FULL_RESOURCE_DESCRIPTOR ff,ff,ff,ff,ff,ff,ff,ff,0,0,0,0,0,0,0,0
Identifier = REG_SZ AMD64 Family 23 Model 24 Stepping 1
ProcessorNameString = REG_SZ AMD Ryzen 5 3400G with Radeon Vega Graphics
Update Status = REG_DWORD 1
VendorIdentifier = REG_SZ AuthenticAMD