Hi again.
I have now upgraded with new grapichs card after i started this post and would like to share my findings.
I first got the EVGA 670 superclocked 4gig. I was very disapointed with this card, all the way from the box to the performance. It came with out anti static bag wrapped around it and was inside a big plastic container, and it almost fell to the floor when i finaly got it open. Also the big bright sticker that goes along side the card fell off
In game over london with all settings max i got about 35-40 fps almost no improvement over my old card. I returned the card next day and got my money back.
Then i ordered the Asus 680 2gb DirectCU II. And WOW. I have to clamp vertical sync over london now with same settings, this is just crazy i never thought such perfomance, im at 50-60 fps constant over london max settings 2560x1440 and have not tried overclocking it still.
And for Vram usage as someone says you neeed 4gig to this game its not true, i use around 1500mb of my screen card ram when i monitor over london, next test will be multiplayer with over 50players.
Wall of text here, but wanted to share my findings if others is thinking about about getting a new card.