Ok, so
my spec is:
-Core2 Quad Q8200 @2.3Ghz (4 core)
-Asus P5Q REV 1.0
-8GB DDR2 RAM
-Asus R9 380X (I know it's bottlenecking like hell, but it didn't before)
-RaptoX 500W PSU (It's a little brand, it worked before well)
-I don't know what do you mean under chassis...
-OS: Win 10 Professional...
So my videos are all lagging around the OS, (Windows Media player and VLC (I use these only )) inside the win10, but if i watch something online in a browser everything is fine... The vide in the OS is starting normally and around 2 seconds it starts stuttering! ( I updated the graphics driver...