its still slow over trees...
 

trees at medium, grass is OFF...when flyin down low (online and offline)....i7920@3.5Ghz, GTX470@750Mhz, 6GB RAM, 1680x1050, TIR5....

...grab an axe


sorry, couldn't resist after I read it in somebody's signature... :D

sorry, no solution but if you upload a track, I can run it on my SLI setup and tell you whether there is difference...
I have set the trees to "very low", land details=high and grass=on and like it, I think the game has too many trees, probably they were thinking about the CO2 offset to the electricity our new GPUs will consume running the game...


~S~

well its playable but FPS drop is very noticable...Will try with trees set to low (although its ugly), land details I have maxed.....

ευχαριστώ

You are correct, the trees are still a performance killer.
I guess it is the only model without a geolod on the map, that causes most performance troubles.
I am running my I7.920@3.99 ghz with 5870HD and flying with Vsync on 60fps...well off course not more.
However, when i fly over London or the sea etc i got no stutters, but flying low above trees or watching into a forest makes the game stutter.
It doesnt impact the fps but stutter comes up.Means the fps keep staying at 60fps.

tbh I didnt measure FPS but it is choppy over trees

I really think the main problem is probably because of LOD's, Arma2 suffered in the same way with the same tell tail signs.
I've noticed buildings res'n in and out of focus a lot too.

just tried again, online, its still slow everytime im over trees....that is with gtx470 Oc to 750mhz on core, i7920 Oc to 3.5ghz and 6 gigs of RAM...

The trees themselves aren't so much the problem, or buildings... it is the shadows which appear to be causing the hit.
Sadly, cockpit and ground shadows are linked.

I turned off shadows...

I keep shadows on to have them in cockpit, but reduce landscape shading by 1 or 2 levels and texture quality by 1 level.

Low landscape shading gives big increase in fps and smoothness with shadows on. Forest, grass, roads do not hit performance with these settings that much on my PC.