performance issue

I'm looking for a bit of help. A week or so ago, I started getting 20 to 30% fewer FPS when using AC. I wondered if it was Dynamic Shaders so uninstalled it but that doesn't change much, if anything. I can't figure it out. (the fps drop didn't come just after installing Dynamic Shaders anyway)...

So I've conducted this little test. Test1: Circuit: Silverstone Laps: 50% Race Mode: Single Player Car: McLaren Laptimes in RACE: Constant low 1.34s and high 1.35s Test2: Mode: Online Circuit: Silverstone Laps: 50% Race Car: Force India (Performance set to equal) Laptimes in RACE: Mid 1.36s...

Hey, I know my pc isin't good at all, but even with pc like that is it normal to get 30fps with 10cars in singleplayer? Specs: Intel Core 2 Duo GeForce GTX 750 2gb 4gb Ram

3D surround: I briefly had it working before the 24 August patch, but yesterday I tried all possible settings and it is not working anymore. Does anyone manage? I open this specific topic as well for discussing performance issues with 3D and 3D surround. While I have for a qualification/trial...