Windows 7: XFX Radeon HD 5770

Hello Guys
I have a big Problem since 2 weeks..
My Problem is that my Display flickers when i connect a second Screen..
I tried everything but nothing helped me
Maybe u guys know the Reason for the Problem.
Im very Happy when someone would help me



Thank You and sorry for my bad English

Check your connections? updated your graphics card drivers? How are you monitors connected? Can you describe "flickered" in more detail?

Hey thanks for your reply..
I checked my connections but everything is fine and i updated to the last version..
I connected my second Monitor with a HDMI to DVI Adapter (then a HDMI CABLE)
There are 2 or 3 small black lines on my screen when it flickers...

Sorry to take so long to get back you. I have been away taking care of other things.

As my 1001st post, I say this:

As someone who has three monitors (one via DVI, one via HDMI, and one via DisplayPort to DVI), I strongly recommend staying away from HDMI unless you are keeping it consistent from end to end (no adapters). DVI to HDMI can be picky at time when it comes to detection and proper signal. Since it sounds like you are going DVI from the card to HDMI to your monitor, I suggest you give DVI > DVI a shot if your monitor supports it (no computer monitor is without DVI these days and even TVs with HDMI typically have DVI, too).