To check if the CPU is the bottlneck, enable task manager before playing the game and monitor the performance tab CPU usage graph. Fire up the game and ALT+tab a few minutes into playing a game (or when it starts to stutter) and check CPU usage, if any core is maxed out then you have a CPU bottleneck
Another possible problem is vRAM limitation. At my settings 1920x1080, max in game settings, 32xAA , supersampling and 16xAF, the game uses up to 900mb vRAM (you can monitor vRAM usage using eVGA precision or MSI afterburner's OSD monitoring),If you are saying that your settings is maxed out and at 8xAA, then I believe your vRAM usage must be very high, and if vRAM usage exceeds your videocard's memory, stuttering will occur. AA can give a considerable performance hit and you might want to tone that down. I would suggest dropping it to 4xAA or even 2xAA and enable 16xAF instead. Personally, I find AF equally, if not more important in 2k11 vs AA. I can not distinguish the difference between 4xaa and 32xaa but I can notice the quality drop if I dont set the game at 16xAF
Another issue is with vsync.The problem with vsync is, aside from capping your max fps to your monitor's maximum refresh rate, it also caps your fps to certain fps levels/steppings that your computer can constantly output.The good thing here is, aside from eliminating screen tearing (which can occur when your fps is higher than your monitor's refresh rate), capping your fps to a constant fps level controls your fps from drastic dips and spikes. I remember playing 2k9 on my GTX 260 and vsync OFF was terrible as, although I would get up to 90fps on the settings I play, it would also dip to the 70s and 80s and that is when you feel that the gameplay is not smooth (when fps changes dramatically). Turning vsync ON capped my fps to a constant 60 and it feels smoother vs 90fps that dips by huge percentages. (stable good fps > higher but unstable fps)
Unfortunately, when your computer cannot output a constant fps level (ie 60fps), It will drop and cap the fps to a lower stepping your computer can constantly perform atand the difference between steppings can be quite drastic hence giving you much lower fps.
see this post
http://forums.2kgames.com/showthread.ph ... -availableIn the manual for the PC version of BioShock, it states that when VSync is enabled the framerate is 60, 30, 20, or 15 depending on what the system can render at a given time. I've noticed in some of the levels that this can provide for some very jumpy performance, particularly when a large amount of smoke effects are partially in view.
To help you play at the highest smooth settings possible, you can try to disable vsync and check which maximum graphical settings you can play that you computer can perform constantly at more than 60fps. THen you can enable vsync so your fps stepping will be at 60fps
further reading on AA and AF here:
http://www.tweakguides.com/Graphics_11.htmlfurther reading on vsync here:
http://www.tweakguides.com/Graphics_9.htmlPS: I noticed you have a 1Gb card, so the vRAM should not be an issue in your case
