Unusually low FPS please help!

[DeadDragon]

Hi I'm trying to run Bioshock 2 Steam copy, my system is

AMD Phenom X4 2
Nvidia GTX 580 1.5 gig
4 gigs of ram
Vista 64

Trying to run in 1920x1200. All graphic options set to off (including v-sync and everything else) or low and no help for the performance. It's really really bad, approximately 15 fps bad. All other current gen games I run at max with 60fps (including other GFWL games).

Recently replaced video card, it was running excellent the first time I played through it (right after the release date) with a 512 mb card at 1680 x 1050.

I tried 1200 x 720 resolution and the framerate remains terrible, the same 15 fps or so.

Drivers are all up to date.

Nvidia control panel is set to application controlled settings, nothing is forced on or off. Tried switching global settings, maximum prerendered frames to 0 as suggested on 2K's Nvidia stuttering support page, no good.

I verified the integrity of the game cache, and it replaced 86 files. It also reset the game to version 1.0. I tried playing both not updated and updated through live again. Made no difference.

I noticed in version 1.0 but not in 1.5 that there is a 3D graphic option in game, which was set to off in 1.0 but not available in 1.5.

I read there is supposed to be a "unlock frame rate" game option but I did not see that in any of the options in either version of the game.

The intro and beginning cinematics both run smoothly. The game runs smoothly at the beginning (when Tenenbaum is talking through the radio) up until the view changes to the official first person hud.

Any suggestions?

[Jaxxdude]

I got the same problem as you. My PC and can easily play any new game (like Crysis 2) with +60 fps, but Bioshock 2 is the ONLY game I get awful fps averaging around 15 fps which is ridiculous. The only way for me to play Bioshock 2 with +60 fps is if I play it in Windowed Mode for some reason. It's so annoying playing in Windowed Mode (since you can't move the screen at all) but I really don't have a choice. Hope that helps.