[RickRuski]

I'm using the Nvidia beta drivers latest release from Nvidia (304.79). Wolo those cards should eat C.o.D. I've found that my modest system will run with everything on max but at lower frame rates (sometimes dropping as low as 19fps) but still playable. Are both your cards from the same stable if not you may find they are running at different clocks (mine aren't and I have balanced them to the same speeds and voltage with EVGA Precision Tool).

Pegasus_Eagle, where did you get the 305.53 drivers? the only place I can see these is Guru 3D and as I understand they might not be from Nvidia, are these running ok for you? I noticed a post on the forum saying that the poster was having trouble with those.

My twin GTS 450's are giving me good frame rates and only micro stutters with the settings I am using, you must remember my monitor is only 19" and has max resolution 1440 x 900 so my cards don't have the same stress trying to produce higher resolutions that a 24" monitor would have. Plus the resolution that I'm using is 1280 x 960.
All my settings are "High" except for forests and buildings which are "Med", I'm finding that AA is not a bother for me so use 2x max. Are you using Nvidia Inspector? if not give that a try it's the only way you will be able to adjust Sli profile. In that you have an over clocking section this is also where I have the settings to match my Precision Tool settings. Check and see if your temps and % of use between your two cards are nearly the same, if there is a major difference your Sli may not be working correctly.