Try the new driver (196.75). It's slightly better and gave about 5 extra fps in control room. I have same system as you :)

Dual GTX 280's here. Shadows misbehave (act glitchy) and perform very badly under SLI. Turn off shadows, and all is well.

Probably a driver issue.

got the game i can confirm performance is terrible for nvidia users running a good card here GTX260OC version.

=control room massive frame rate hits?
=external is very glitchy in performance

dev team need to address all round frame rates for nvidia users.

http://www.subsim.com/radioroom/show...87#post1292687

maybe that can help :)

Q6600, 4GB, 280GTX, shadows are definately biggest performance hag, w/o them game runs like a charm.

not to turn this into a ATI v. NVIDIA issue, but it looks more and more like a NVIDIA driver issue.

I spent some time testing the FPS on my system last night.

I have a E8500, ATI 4890 (cat 9.12), 27" Dell WD monitor,creative X-fi fatal1ty soundcard, 2 gigs DDR2, Win XP pro sp3.

running at 1920x1200, max graphics, shadows on, v-sync off, no AA.

Inside the boat the fps always hovers between 60-80 and never goes below 60.

Out on deck in the ocean, fps again between 60-80 even when looking at shadow of boat. Boat shadow is rendered correctly.

The lowest FPS I have seen is 35-40 when on deck leaving harbour in the Narvik single mission. That scene is heavy with scenery and friendly AI ships.

I have never seen any slowdowns with explosions, etc.