...after I did this I've installed the catalyst driver...the same problem with a fresh installation...
After changing the RAM, the power supply and monitor cable I've changed the monitor self...
A wonder happend: the 19" NEC Multisync 1960 NXi was detected and shows the bios at the startup!!
The other 19" Medion MD 32119 PR is my normal monitor.
There are no drivers for Windows 7 but I think they're not necessary (<- can't remember this word
).
The catalyst driver recognized both monitor correct but the medion seems not to send the correct possible resolutions.
So I start with the NEC and then connect the medion. This works until the next start!
I try to find out why the medion didn't send the right resolution...