6990 problems

[LBSPhellfireAk]

i have a 6990 , a 750 w psu ,amd phenom 2 x4 945 oced to 3.45ghz and 2 gb of ddr3 ram ,bf3 gets so much lag is it microstuttering or my gpu's been bottlenecked by my cpu ,and also ac revelation touch 100 fps at 1080p everything full 4x msaa,but when i turn it on to 8x it dips to 30, pls tell me is it my cpu or the 6990 is not powerfull enough to handle it

 

[alvine]

turn your vsync on
also you need more ram 2gb is not enough, 4gigs minimum 8 gigs recommended

 

[ilysaml]

2 GB RAM???????? and HD 6990 with Phenom II 945??????????????

You need to get at least 4 Gigs of RAM and OC that CPU to 4.0 GHz.

 

[Earnie]

2 GB RAM???????? and HD 6990 with Phenom II 945??????????????

You need to get at least 4 Gigs of RAM and OC that CPU to 4.0 GHz.

Agreed,I use 5.3G of ram while playing BF3.So I would say 4 as a minimum.