Strange pixelation issue

[Tofite]

Hello all.

 

Earlier this year I posted some information about a problem I was experiencing on my PC (I highly recommend you read these posts to gain more info). I was experiencing low fps in games, frame drops, random black screen crashes, and random system restarts. Since then, I have RMAd both my power supply and my graphics card. My graphics card was RMAd twice, the first time I received a repaired card, and the second I received a brand new one. The replacement of these tow components didn't seem to fix the issue at all. Now, I experience the same bad framerate in some games, including Terraria and Arma 3, as well as frequent frame drops. However, I now also experience this pixelation effect on screen. This effect happens when I alt+tab between games and desktop as well as when I start games or change game rendering resolution. Could this effect and symptoms indicate a faulty component/s? In attempt to solve the problem I breadboarded, reseated the CPU/GPU/RAM etc. I also tested both RAM modules on their own. None of these techniques seemed to have an effect. Below you will find the best images I could capture of the effect on screen.

 

 

My system specs:
CPU: Intel Core i5 4590
RAM: Kingston HyperX Fury 8GB x2 DIMMs
GPU: Gigabyte GTX 970 G1 Gaming
PSU: Corsair CX-750M
MOBO: ASRock H97M-Pro4

 

 

 

 

My operating system is Windows 10 64-bit and my BIOS is version 1.9 as per this table: http://www.asrock.com/mb/Intel/H97M%20Pro4/?cat=Download&os=BIOS

[Archarin]

It's definitely the GPU.

[APasz]

This is artifacting not pixelation to be clear.

If you've re-seated everything, RMA'd you graphics card then it must be a software problem.

Have you tried completely re-installing your drivers?

Also maybe run Trend Micro Housecall just to be sure it isn't some malware.