GPU rendering issue

My GPU has been rendering certain things strangely. It started recently, the first time I noticed was in a game (dota 2). I have updated drivers from Nvidia Control Panel and have tried a couple other things to fix this. I have no idea what the problem is technically called but I have clear pictures of it. It only affects things like the FurMark benchmark I ran and games. The desktop, watching videos, and just daily usage are not affected at all. The problem is the little squares you see in the pictures below.

Pictures (imgur links):
FurMark - http://imgur.com/lN9PU6w&JlzQx1S#1
Dota 2 - http://imgur.com/lN9PU6w&JlzQx1S#0

Specs:
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8.1 Pro, 64 bit
Processor: AMD FX(tm)-8350 Eight-Core Processor, AMD64 Family 21 Model 2 Stepping 0
Processor Count: 8
RAM: 16299 Mb
Graphics Card: NVIDIA GeForce GTX 650 Ti BOOST, -2048 Mb
Hard Drives: C: Total - 122001 MB, Free - 69796 MB; X: Total - 238472 MB, Free - 219483 MB; Z: Total - 2861458 MB, Free - 2041007 MB;
Motherboard: ASUSTeK COMPUTER INC., SABERTOOTH 990FX R2.0
Antivirus: Windows Defender, Disabled