Regging just to join in the mess here and offer some more info for people. I have no idea what the hell is going on any more.
Just upgraded recently, using a Core i5 760 (
[email protected]) and a Gigabite GTX 460 1gb (stock clock), using the 258.96 nvidia drivers.
Buffer size is resolution, shadows high, textures high, texture filtering highest.
For me the performance is bound almost entirely to Depth of Field and AO being on. Turn either on and it drives performance into the dirt -- open field, I'm lucky to get ~35fps with DOF on/AO off. Any kind of fighting, even a duo in a cave, and I'm looking at ~20-25.
With both off I can run at No AA or up to 8xQ MSAA and be framecapped (I assume? I never see it go higher) @ 60fps in open areas. Performance seems about similar in busy areas as well regardless of the multisampling choice, dropping to about ~40-45 in nasty spots. This is all windowed -- performance is a little better fullscreened but not dramatically so.
My main concern is this thing rides the GPU like the furmark stress test and it shoots straight to ~97% usage and never goes down. I'm not OC'ing and temps are staying "okay", but it's still ridiculous, not to mention the fan noise. I'm just worried about cooking this thing slowly.
Oh, and as an aside and to continue to echo earlier sentiments, I get that weird crap ass blending on lightning too. Jamming shadow detail up and the multisampling helps disguise it but it's absolutely still there.