Happens to me also, I'm on a quad core @ 3.6ghz and on 4870x2 x2 .... I run all new games @ higher fps than ET... I get around 60 sometimes on Radar LOL.
If you press TAB/ALT/Control or anything to check your starts the fps will lower to around 5-10 And 123-125 is not what you can feel so i think you just press tab/alt
omg i got 40 to 125 what's gonna happen now? i got it for last 2-3 weeks already and it's not that my gfx /cpu can't handle 125 stable fps, what about that, am i going to dieeeeeeeeeeeeeeee?
I'm having fps drops too lately :s kinda strange.. normally it's always 76stable but then suddenly it drops to 40, after 3seconds of standing still or moving it gets back to 76 stable... give me a solution pls!!
merry xmas
you feel laggy then
GO FUCK YOUR MOTHER
now i won't help you..
E: I got the same "problem" as him btw!
now 125 all the time !
had the same problem :D