Nvidia released "game ready" 344.75 drivers but we're still having SLi flickering and bright white fog bug, but performance has improved. this new SLi compatibility flag seems to alieviate the flickering: 0x0C4330F5 feel free to test, my friend is still experimenting with flags but seems to think this one works well. still needs a real fix from EA/BioWare though...
also those of you with keplar SLi cards may want to turn HBAO down to SSAA if you want MSAA. I've heard reports that turning AO off completely may remove flickering, but at the cost of image quality.
here's my settings for GTX 690 (can't seem to handle 2560x1440 in this game)
resolution: 2304x1296 (16:9 custom), with no scaling for sharper image but letterbox around my 27" monitor. Scaling works too but adds a bit of blur. This basically turns my 27" monitor into a 23" while still staying sharp. Kepler's just weren't designed for much over 1200p I think... Can also try 2133x1200 (16:9) or 1920x1200 (16:10). 1080p obviously runs better, but looks bad on a 1440p screen. Game has native internal resolution scaling too, so you could try turning it down to 0.90 or lower on a high res screen but at the cost of some blur.
Mesh: Ultra
Tess: High
Tex: Ultra
Shadows: Ultra
Terrain: Ultra
Veg: Ultra
Water: Ultra
Post-Process: High
AO: SSAO
Effects: Ultra
MSAA: 2X
It seems to be a tradeoff if you want HBAO Full or MSAA, but I honestly don't see much of a difference between SSAO and HBAO+, some people even prefer SSAO. With these settings I mostly get 60fps, and 30fps in cutscenes with little to no stuttering/hitching. Game seems to eat up VRAM like crazy, afraid to try fade-touched textures on 2GB. I highly recommend turning off any second or third monitors for lower VRAM usage.
Hinterlands still bottlenecks around 45fps, even with low res, with some hitching/stuttering. probably CPU/Engine bottleneck even tho I have a 4.5GHz core i5. Might need to turn down some other CPU-intensive features for smooth performance until we get a bioware patch or further optimized drivers.
PS: If you hate the motion blur (negligible performance impact), add these lines to Documents\BioWare\Dragon Age Inquisition\Save\ProfileOptions_profile
GstRender.MotionBlur 0.000000
GstRender.MotionBlurEnabled 0
PPS.: EA/BioWare please patch this, I'm not sure how much more optimizing Nvidia can do on their end... AMD users say they have flickering too. some tips on what settings might be bottlenecking certain areas would help too. flickering seems to be related to lighting/AO, and the bright white fog bug makes dungeons really ugly and difficult to navigate.
Edit: Disabling Origin In-Game reportedly reduces stuttering some. Also changing the first undefined flag in nvidia inspector from 0x00000003 to 0x00000000 can reduce stutter too, but at a slight performance cost. see thread here for details: https://forums.geforce.com/default/topic/789856/geforce-drivers/dragon-age-inquisition-major-issues-on-nvidia-hardware-/post/4370663/#4370663