Maybe try and reseat your CPU, also clean your PCI socket. Make sure your MB screws aren't overly tight

Is your spare AMD PCIe 3.0?

lastsamurairick
Hi Omnious thanks for trying help. yea check all that. Yes AMD is PCIe 3.0. After RMA My original EVGA Geforce RTX 3070 Ti FTW3 Ultra and send it in to EVGA. NEW GPU I received giving me same D6 Code. Really and yes different serial number I already check it out make sure same one was not sent by mistake. What is this out the frying pan than into fire again. What the heck EVGA. I made sure I set everything just right and HDMI cable is new and none that cheap crap eighter.

I have interesting experience with the D6 error code
The I discovered how much easier things can be with a little patience... :)
 
I have a Z690 Dark sitting in a box because of D6 error code.
I decided to reconfigure my fans after getting a thermalright contact frame and made multiple mistakes which led to no display output
I was impatient and stupid by rushing to get it all put together so I could get back into the game on my only night off while working a lot of overtime
 
Put it back together and power on to error code-D6 (no input device/no display output device) \
I could tell the CPU and RAM were fine because windows booted after D6 post code and and was running as normal
I could tell because the RGB and AIO LCD display would be turn on after ICUE started with my saved profiles
 
I know I over-tightened the contact frame screws 
I also dropped a 3070 ti FTW3 on the PCI slots while having to wiggle it out because I didn't use the included PCIe release tool. Gosh I should have just played my game
I literally used a drill with 1 good-enough sized bit for 80% of screwing.  I could have flaked metal into a slot or socket so easily
 
I either concluded I either broke the 1700 Socket, the PCB traces, my RTX 3070 ti FTW3 or all three
 
I bought a cheap Geforce GT 710 which is PCIe 3.0 and it worked, but after being on for a half hour or so, restarting would cause D6. leave it alone a few hours it would not D6
Had to be something related PCIe 3.0 and less lanes or being a SFF GPU and seating differently...
This made me think what was wrong was primarily motherboard related
I was very busy with work so I put the Z690 Dark in its box to forget about until...
 
A week later, EVGA started their winter sale with the Z690 DKP 50% off. I was so happy to get another for a price I could somewhat reason. THANK YOU, EVGA!
 
When new Z690 DKP arrived, I swapped HW to the new Z690 Dark and everything worked 
Z690 DKP is an amazing board
 
I've been doing my research and want to see if I can fix it but I don't want to use my working rig's CPU
I should just get a 13900K so I can have a LGA 1700 CPU to troubleshoot
 
 
 
 
 

Great news guys after extensive talk with EVGA Support it was long talk is Not the GPU nor MOBO is the CPU so got on phone with Intel and talk to Tech and we talk for 2 hrs some min and he troubleshooted my CPU. So the game plan is to deal with it. Finally glad is not EVGA Fault heck GPU I sent in was not even faulty heck could saved money in shipping on both ends. Like I told EVGA Support thank you thank you for the great support and being there when issues arise they are absolute Champs. Reason being no way it be that bad 2 GPU's Draw D6 code too life is strange but hey let it chill. Anyways I was planning on buying the intel i9 10900k so that be fix soon. Intel told keep in touch with Tech work with me by E-mail and let know any crashes, booting issues and ETC ETC to keep him in the loop. This is done in this servers all this problems were from another source.

Sajin
How did the intel tech determine it was the cpu?

Intel tech support provided me with a E-mail address to stay in contact with Jose tech support case still open and he let me know to keep him posted of my PC behavior and to E-mail him if PC lock,  get blue screen of death, ETC ETC. He told me it will be ongoing troubleshooting for period of time. So case stay open and to E-mail him with any issues I could be having. This is great costumer service. So we have not yet determined the CPU is the culprit. He did told me remove the Memory XMP1 I had going on since he said that might be problem i5 10600KF might not be able handle it. I am going restart PC now see if I get D6 Code again without XMP1 disabled. {Code 04 seems to be gone}

So the tech just wants you to replace the cpu first before the motherboard as it’s less of a hassle to deal with first.

lastsamurairick
Well his working with me to see if CPU is faulty. But my opinion is CPU @ fault but the flaw might be so insignificant that only by Intel accepting it and connecting it to there machines to really see what is wrong with CPU would they ever figure out it is the CPU. Just one them odd things happens. Well if they decide to RMA it fine if not than I am actually going save some money buy me a Intel i9 10900k ($352.93 box) anyways they are cheap enough to get and good step up from 10600kf. My CPU still under warranty up to todays date of 04/02/2021 so I am ok with what ever outcome. Win some lose some.

4-2-21?