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It could also be malware related causing havoc on your display so try running a full scan.
Your PSU(Power supply) might not be able to supply enough power to your graphics card,
causing graphical problems. Check how many watts your PSU can supply and how much watts your graphic card requires (Take into account that other hardwares require power too).
If you have any old graphics card laying around, use it and try to see if the same problem occurs.
If the problem still persists, try doing a ram check using MemTest86 which will take several hours depending on how much ram you have.
If it found any problems, try testing one stick of ram at a time to determine which stick of ram is causing the fault.
Though, I highly doubt that your monitor could be causing the problem so try either using a different port like say if you're using HDMI, use VGA, DVI, etc or try using another monitor instead.
If you've determined that it's your graphics card, you should RMA it since it was bought a month ago, it should still be under warranty.
Note:
Be sure to turn off the power and unplug any cables(HDMI cables, usb devices, power cable, etc) first before doing anything hardware related (Removing ram, swapping GPUs, etc).
Never handle any hardware on a carpeted surface or any surface that will generate static.
Make sure you're properly grounded by touching the metal casing or by wearing an anti-static wristband because static will shock and fry tiny components.
(I'm not a professional IT person, I'm just trying to provide some solutions that may help you)
I also recommend asking this on a tech forum as people there can help you better.
Ah, I assumed you were using a desktop.
You could always try to send it back under warranty if all else fails.
Just don't damage any "Warranty void if sticker damaged" stickers.