Question Anyone have a 'snowy' monitor?

Jun 1, 2020
I purchased almost a month ago. A basic 1080p 27" monitor. I installed drivers, and updated my gpu drivers. It's been working well the entire time.
Today, however, I have horizontal snow. I've tried changing resolution and other settings, and tried different apps, but it won't go away. It's tough to see on a white screen, but when contrast is introduced, it bad. Like old sci-fi movies when they transmit video and it's static-y?
It's attached with a new HDMI cable.
I'm wondering if my 8 year old video card is going bad? (It's a cough sapphire radeon HD 7770 1GB.) The cable? The monitor? (I just threw away the box last week, so no RMA...)
Anyway, wondering if anyone has seen this before and if there is an obvious fix I'm missing.


Welcome to the forums :D

a few things that may help.
try another cable, try the other ports of you can, VGA, etc. clear the cable as working.
try the monitor with a new source and a known working cable, a DVD player, laptop anything that can can output to the monitor - make sure its not the monitor
if you have a different monitor, try with it. this will verify the monitor and the cable are working.
canned air is your friend - hold the GPU fan blades still and blast all the dust away.
if the monitor and the cable checks out, that only leaves windows and the card.
you can make a linux USB and boot to that. if the same happens with all new software its the card, if the issues clears up with all new software its in windows or another software issue and you now know where to look.

Boot to a USB drive with linux on it. grab a USB drive, a copy of rufus and a linux distribution. has tons of differing linux distributions and download links. I personally am fond of linux mint with cinnamon. the utility used to extract the ISO file to the USB drive.

use rufus to extract the selected ISO to the thumb drive. it will make the drive bootable and you can run linux from the drive once done.
Reboot into linux and proceed to test the hardware. connect to internet, watch videos, await problems.
if linux is good and stable the issue is most likely inside windows or otherwise software related.
this is a test of the hardware