Thanks for the reply.
I already tried changing from DVI to RGB. With DVI cable I am allowed max 1280x1024 resolution. When using the RGB cable I can go to 1360x1024.
Also tried using the boxed monitor driver but it is a 32 bit version - still no effect.
I would be grateful for more tips
Unfortunately I tried this already. I dont think its a graphic card problem.
I installed an older graphic card and the problem persists.
I am now convinced that it's not the graphics its the monitor (Syncmaster T220).
My only conclusion is that W7 64bit cant detect T220 correctly.
I will try to contact Samsung.
And I will buy a new monitor tomorrow.