Usually 20 fps Morrowind. 8 fps on Terraria, and 35+ on Age of Empires II.
I'm okay with this. Anything above 5 is playable, depending on the genre. Terraria is playable, but CS:S isn't playable at 10fps.
Anyway, I decided to play some CS:CZ. I usually get 25-30 fps.
Today, I got:

After a round, it dropped to 3 fps.
I checked my Task Manager, 10% usage, nothing strange was opened.
I rebooted, still didn't help.
;.;