I built my PC back in December 2013 (Windows 8.1) and everything was running great. Even Battlefield 4 runs at complete ultra and 60 FPS with good temperatures and never drops below 58. I have an FX 8320 cooled by a Coolermaster Hyper 212 EVO and my GPU is a Gigabyte GTX 770 4GB OC (running latest Nvidia drivers of course). All of my games run fawlessly besides two in particular: Borderlands 2 and Skyrim. Although my FPS stays constantly above 50 in both and never drops or jumps around, I get small stutters in game. The strange thing is that this didn't happen within my first 15 hours or so of gameplay in both. I have tried things such as disabling HPC mode, unparking cores, etc. but to no avail. I'm at a loss here. Does anyone know what could possibly be wrong? My RAM sticks are both in their correct slots, same amount of memory, and the same brand (G.Skill Sniper 8GB (2 x 4GB) DDR3-1600). Could it be my HDD? Keep in mind this is a problem that has only recently arisen. I haven't downloaded or used any new programs either. Could improper application of thermal paste or poor thermal paste/wearing out of thermal paste cause such issues? I used the stock paste that came with the cooler master fan and applied a small dot in the center of the processor before placing the fan.