How can i play cysis ultra high without buying any thing or ubgrading any thing

Well to be honest, a Q9550 processor isn't bad at all but Crysis depends far more on your graphics card more than anything else. Also, an HD 5970, the fastest desktop graphics card available, cannot play Crysis at 1920 x 1200 resolution Very High with anything higher than 2x AA.

Go to http://www.yougamers.com/ and click on the Games link and find Crysis. It will run a quick assessment of what your PC is made up of and will tell you where it falls in line to play the game.

It's a great site that I go to and it's always right on the money.

If it states you can play at high settings, ensure you've installed all the latest drivers for your system.

I beg to differ my friend. You do get 30 fps @1900 X 1200, on an average with the 5870, with everything turned to max. Even the 5850 manages a respectable 25-26 frames (which is quite playable for Crysis). The 5970, on the other hand, handles 1200p extremely well.
http://www.tomshardware.com/reviews/radeon-hd-5970,2474...