3 Monitor (Eyefinity) connections / screen tearing

[blacklist]

I have read that using different connectors can cause screen tearing, it appears to be on all monitors.

I have the HD 6990 which has 4 mini-display port and 1 DVI.

I have screen 2 and 3 connected via display port to HDMI and screen 1 (left side is DVI to HDMI)

If I use display port to HDMI for screen 1, when I boot up I get no video. So if all 3 use display port = no video.

To clarify, yes I'm using a passive and active display port adapter.

Hopefully it's something simple that I can change in the CCC

 

[sk1939]

So let me get this straight you have display 2 and 3 connected via a DP to HDMI cable, but when you connect screen 1 with a similar cable you get no video? That is because the 6990 only has 2 video clocks, and required the use of an active adapter for a third display. If using the active adapter dosen't work, then report back.

 

[blacklist]

I have:

DVI to HDMI on screen 1
DP to HDMI on screen 2 (passive display port adapter - comes with card)
DP to HDMI on screen 3 (active display port adapter - non powered, you don't need the powered one unless you push above 1980x1200 res monitor)

When I change screen 1 to DP to HDMI (like the others) I get no video. Basically leading me to believe I need to have DVI always connected.

 

[sk1939]

Possible. It could also be that the manufacture only assigned clocks to the DVI and one of the DP ports (meaning another active adapter would work).