[SOLVED] Is this signs of a faulty Vega 56?

Hello so I was hoping somebody could help give some input on a very frustrating situation. I just recently bought a Samsung 55" NU8000 Display with freesync. With this Display I also purchased a Vega 56 GPU to be able to utilize freesync.

To make a story short I have been getting very strange behavior from the setup and I don't know if it's the Display or GPU causing the issues.

It first started with the Display not being able to properly detect the resolution on certain games causing it to think that there was no source input. To resolve this situation I would either have to restart the PC or reset the hdmi connection. I have changed some of the settings on the Display and I believe that this issue has been resolved but I'm not completely sure. But....

Then I noticed that every now and again when I would play Far Cry 5 I would get these weird graphical glitches I will post some images to show what I mean. I thought maybe by chance that RTSS was causing this so I uninstalled it and everything seemed fine as far as I could tell.



Then just last night I was playing Doom for about 1 hour and my Display went crazy.

I thought maybe it was the game so I alt+tab to the desktop and it still looked the same. So then I proceeded to try and change the source on the Display to my PS4 and the Display menu would not appear and the screen just flickered really bad. So then I did a hard reset on my PC and the Display was still doing it so finally I reset the hdmi cord and it resolved the issue.

So I guess my question is has anybody had similar issues with a Vega 56? Is this indicative of a faulty GPU? Did the GPU some how cause my Display to glitch out? Could freesync be causing all these graphical glitches?

I have noticed no image quality issues with the Display it's self. No lines, no color blemishes, nothing.

Please Help I only have a few days to return the GPU if need be.

Specs:

Desktop
PowerColor AMD Radeon Vega 56 RED Dragon HBM2 8GB (AXRX Vega 56 8GBHBM2-2D2HD/OC)
Windows 10 64bit
Radeon Software Version 18.9.2
Display Samsung 55" NU8000 w/ Single HDMI 2.0 Connection running at 1080p/1440p 120 hz w/ freesync
Asus Z170-A ATX DDR4 Motherboard
i7 6700k CPU /w factory clocks
750 Watt PSU Coolermaster
G.SKILL Ripjaws V Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000)Model F4-3000C15D-16GVR

http://www.coolermaster.com/powersupply/gx-series/gx-750w/

It's fairly old like 7+ years I'm guessing when I bought it new.

I guess I didn't realize a PSU could cause problems like this. I figured it would either work or not work. Sadly I do not have any other system I can test it on. All my friends use consoles only

Is there a PSU you recommend?
Is there a a way to check to see if this card is getting adequate voltage?
Can poor performing PSU cause stutters in games also?

I've always wondered if my PSU was causing issues even in the past. I suppose it doesn't hurt to replace it and just see what happens. I just wish I had more time to test this GPU to make sure its not gonna give me issues in the future. My budget is $100 which I think is fair for a PSU.

After the major incident last night I did get on again later and played Doom at 1440p on ultra settings for several hours with absolutely no issues. I also stressed tested it with furmark for 2 hours at a max temp of 75 degrees with no issues. That's what is frustrating is the incidents seem completely random.

Is there a way to check voltages to make sure there adequate?

I'm gonna keep it stock and play for another several hours to see if I can get any issues and if I do I will try and downclock the memory and see if that does anything.

Thanks for all the responses so far....