Build General Info
Intel i7-9700K - [With CPU waterblock and backplate from ]
Asrock Z390 ITX - [BIOS updated to 1.60, all drivers including chipset update to latest, except cannot install Optane Drive and IO ones]
EVGA RTX2080 XC Ultra - [With GPU water block and back plate from , installed with anti-static wrist band]
Corsair Vengance LPX DDR4 3200 - [Tested with Windows Memory Diagnostic, no bad sectors]
Corsair SF600 Platinum - [With custom Type 4 cables in NCASE M1, tight PCIe bending]
Samsung 970 EVO 1TB SSD
Custom PETG loops - only small drops on MOBO and near GPU waterblock inlet before when it's powered off. Dried with tissue and sitting in air. Leak test performed with ATX jumper with pump power only.
Windows 10 Education without product key
Connected to LG OLED TV via HDMI port on GPU

Symptoms

1. No artifacts on Post or BIOS
2. Artifacts appear briefly after windows logo show up, see bottom for image
3. Code 43 in device manager, recognised as RTX2080
4. Tried toggling resolution, the higher the resolution, the more artifacts on screen when dragging windows around

Attempts to troubleshoot so far

[NO LUCK] Uninstall GPU drivers using DDU in safe mode, reboot to normal mode, install pre-downloaded RTX2080 drivers, custom and GPU drivers Only. Drivers in Standard, May 5 2019 ver.

[NO LUCK] Same as above but let Windows 10 to search for drivers, Mar 19 2019 ver

[NO LUCK] Switched from custom PCIe 6+2 to Stock SF600 PCIe 6+2

[NO LUCK] Use  to patch registry, no luck

I have drained the loop and tear down the GPU waterblock. Please check this link for detail pictures of the PCB.
https://imgur.com/a/1XMQaQ3
Other than the EVGA black OEM stock washer seems to have some gluey thing, I cannot tell if there is anything wrong with the GPU PCB. Any ideas?
Thinking if I should put it back together to test again or just restore it for RMA and return.
Other ideas are welcome!

About to start RMA if further attempts do not work for the day, should I contact Amazon or EVGA directly given I installed GPU waterblock? I purchased in March so it's been over a month. I will restore it to default. I checked the policy this does not void the warranty.

MANY THANKS!

It is Best to use a Monitor & not a TV when setting up your PC --> so you can go into Nvidia Control panel & make the Adjustments Your TV Requires
 
Always Best to test card with the stock cooler First - before custom loop
 
Installing your own water block can be challenging.
 
There have been reports from other members that upon reassembly they found "Unwanted Contact" between the GPU "support plate" & a circuit that caused a grounding issue for them.
 
 

AHowes
Yes kinda looks like the screen resolution is not compatible with the monitor. What screen resolution do you have set in display settings or in the nvidia control panel?

Try 1080 at 60hz just for a test cause any 4k monitor should do it.

 
exactly what I was thinking - use a monitor to correctly set the TV resolution & refresh & Chroma

Welcome to the Forum
Is CSM Enabled or Disabled in the Bios.
I have seen Code 43 with CSM Enabled.
Also do not use the HDMI-ARC Port on your TV
I did not read that you have tested with more than One HDMI Cable, I had and Amazon Basic HDMI Cable that cause about the same as what is shown in your image above.
You can also test using the Cables Below

Or an adaptor like this

 
 
https://i.imgur.com/DMPw35O.jpg

ty_ger07
Put the air cooler back on it and see if the problem goes away.

Multiple people have had issues with using spacers or not using spacers, using washers or not using washers, using threaded standoffs or not using threaded standoffs, or using the old screws or using the new screws which come with the block. For whatever reason, these cards seem to be finicky and the waterblock install using the waterblock install instructions doesn't always work out. First test the card with the air cooler reinstalled. If it works fine again, then contact the waterblock manufacturer for troubleshooting information.

Didn't expect the card would have much issue based on how good EVGA's reputation is, I thought only the first 2080 Ti batch had problems. 
 
I am reassembling the waterblock to give another try. IMO, I feel like the screwing with waterblock vs stock air cooler is almost identical except waterblock has more thermal pads. Problem is I dont have a CPU cooler in hand to test an air build :(

Thanks, tried almost everything on there except #12 which is going to RMA.
Scratching my hair out not sure what's wrong. 

bcavnaugh
 
Before you head down the RMA Path you should test with a Standard Computer Monitor using the DP Port and Cable.

How would that affect a Code 43 error?

Yeah thats all indications of a video card problem i would say. Do you have another card to put in and see if all problems go away?

Thanks for the reply guys, I just wanted to make sure before I star this long waiting RMA game.
Unfortunately my build doesn't have a CPU cooler for air testing. I already got a support ticket number from EVGA so I guess I will send it in tomorrow for RMA.
 
Will keep logging my progress.

ty_ger07

anpanmant
Thanks for the reply guys, I just wanted to make sure before I star this long waiting RMA game.
Unfortunately my build doesn't have a CPU cooler for air testing. I already got a support ticket number from EVGA so I guess I will send it in tomorrow for RMA.
 
Will keep logging my progress.

I don't know why you keep repeating the CPU cooler thing. You don't need to air test the CPU. Just connect the two hoses together which would otherwise connect to the missing GPU cooler. If you don't have a way to connect the two GPU hoses together, you can use your GPU waterblock to connect the two hoses together, even if the GPU waterblock is no longer attached to your air-cooled GPU.

Sorry for the confusion. I get your point. Due to my set up is hard tubing, I dont have the flexibility to connect the way you describe it, and I don't have any soft tubing fitting available for such loop :(
 
This is my first and only PC at this moment so I'd like to test on another platform if I could.
 
Thank you so much!