So about a week ago i had a hard drive die on me. Replaced it with an older one and the pc works great. Yesterday when I was gaming i had a BSOD. I didn't save any of the information because i restarted it and it went away. I ran Prime95 all night and watched my GPU temps when in game and concluded that wasn't the problem. Just now however, I was playing global offensive and when i started it up the game just lagged like crazy. It normally gets 60+ frames but then it went down to 30. I minimized to start up a temp program and the mouse kept getting stuck as I was moving it. It would just stop for a split second and then continue. So i exited and upon restart the screen just went black but the computer remained on. This is confusing me, any input?