Windows 10: System crash BSoD! please help!

Getting blue screen often after installing Windows 10 Home. Did a clean install of windows but still getting. Updated drivers but no effect. Ran memtest86 to check RAM and it passed. Attaching below dump during recent last 2 crashes. Please help!this crash says VIDEO_DXGKRNL_FATAL_ERROR 113Dump file in the below linkhttps://1drv.ms/u/s!ApmUQNza6pikh0f4m8a0t8_l_K8J?e=l1lIlgGot one more blue screen after this today which says IRQL_NOT_LESS_OR_EQUAL aDump file in the link https://1drv.ms/u/s!ApmUQNza6pikh0f4m8a0t8_l_K8J?e=MhZ3hbSystem configrocessor AMD Ryzen 7&nb

:)

 

Help! New system keeps crashing

Ask this guy if he can help ->>

 

all games crash!

I suggest you run rthdribl > http://www.daionet.gr.jp/~masa/archives/rthdribl_1_2.zip
Increase the window size step by step and watch your vga temps permanently.
What happens?
If it crashes, run at stock speeds as suggested before and retry.

P.S.: When your system locks, does the display signal turn off after a time?
Stuttering sound or no sound at all when freezing?
What X1800XT model do you own exactly?

 

Help with unstable system

latest update,
I have changed psu for xfx 750W and keeping to stock values and use on board graphics, the system seems stable , has been for several days. If I try to unleash, then Its prone to occasional crashing.
So next step was to put HD6950 in with CPU in stock setting.
System very unstable again. crashes after about 5 mins.
I have lots of fans , CPU temp ~35deg, HDD ~30deg,
HD6950 ~ 49deg
When system crashes, I dont get bSOD but a grey screen with thin black vertical lines. I then have to re-boot . I get back, Windows reports error with usual 124 error.
Could the CPU be an issue ?
Dont have another to test.
Any suggestions ?
Thank you