Im running with 2 slots.

When i was playing left 4 dead 2(5 mins ago) my pc restarted itself then on windows my pc froze. I restarted my pc it froze during boot screen. I changed ram slots now sometimes i cant get any visual or sometimes it freezes on "windows error recovery" screen. Restarts itself. Something weird is happening help me.
Video: https://www.youtube.com/watch?v=KNHb...e_gdata_player