Best graphics settings

[alexwilgus]

Hello, I've been playing Amnesia for about 2 hours and have tweaked the graphics settings as much as I know how but still am getting some framerate issues. There are so very many options for graphics modification, would someone mind telling me the best graphics settings to get a clear framerate while still keeping as much of the graphical richness as possible for this compy:

Hardware Overview:

Model Name: iMac
Model Identifier: iMac9,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.66 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz

and this graphics card:

NVIDIA GeForce 9400:

Chipset Model: NVIDIA GeForce 9400
Type: GPU
Bus: PCI
VRAM (Total): 256 MB

Thank you very much. I am very much enjoying your game and want to experience it to its fullest. It's been scaring the crap out of me, but I just can't stop!