BSOD on chateau for CS:Source

Geminiwave

okay so this has been really freaky for a long time. I play Chateau and I dunno...it gets laggy. I assumed it was the internet or my computer or something...but none of the other levels do this. Anyway so I was overclocking and everything was good. Its an overclock I've had for awhile and know to be very stable. So I'm playing and its getting freaky...and all of the sudden I headshot someone and it bluescreens. I dunno what the deal is but anyway normally theres an error message...NOTHING. The screen was blue but nothing on it. And you know how normally it generates an error report that you can read later? NOTHING! No log. Its like it never happened. I just dont get it