Old Monza slow down

[Chimaobi]

I'm getting massive slow down while viewing the replay on this track.
It drops from 100+ frames per second to 15 or 25 fps on certain parts of the track.
Is this a known bug or just the fact that the games in beta and lacks optimization on certain /all tracks?

Thanks for your help

Here are my in game settings:

resolution 1980 x 1080
single screen
full screen rendering
No vsync
4x filtering
2x anti aliasing
fast ant aliasing off
motion blur 2
cube map res low
2 faces per frame


My PC specs:

i7 930 @3.8ghz
12gb triple channel ddr3 ram
128gb samsung ssd
gtx 660 2gb sli (sli doesn't seem to work)
corsair HX 750 power.

 

[Cedric Germain]

well knowing you've got a Titan and are getting slow down makes me feel a whole lot better

Do you think it might be a bug or just lack of optimization?

The same here.

Moreover, in game or in replay, although I have 120 FPS almost all the time, I have stuttering and It's not 100% smooth

I'm running:

Intel Core i7-3770K, 4x 3.50GHz
NVIDIA GeForce GTX 780 3GB

I play on IIYAMA 27" 1920*1080, 120Hz

Do I have to force V-Synch or change the fresh rate. Currently I choose 119 Hz.

Thank you