Not able to get max resolution with displayport adapter

[acrunner71]

I recently received 3 monitors of the same model to setup a 5760x1080 eyefinity display.

3 monitors:
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236117

using a single 6950 video card:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150550

with an active mini displayport to DVI adapter for the 3rd monitor:
http://www.amazon.com/Accell-B087B-006B-DisplayPort-Single-Link-Certified/dp/B004071ZXA/ref=sr_1_1?s=electronics&ie=UTF8&qid=1320618563&sr=1-1

My problem is no matter which of the monitors i use with the adapter, even if it is the only monitor plugged in, i am not allowed to choose 1920x1080 as a resolution. The other 2 monitors once plugged in via DVI are fine and are able to display 1920x1080. This is a problem when setting up eyefinity obviously because it takes the lowest resolution of the 3, and in my case made a 4800x1200 display group. I have used different DVI cables so i don't think its a bad DVI cable. Is it possible that i got a bad adapter cable? or am i doing something simple wrong?

When i plug in the first monitor with the adapter:
http://img710.imageshack.us/img710/2940/dwm2011120219435586.png

2nd one:
http://img69.imageshack.us/img69/438/dwm2011120219475153.png

3rd one:
http://img844.imageshack.us/img844/64/dwm2011120219512338.png

 

[rolli59]

I believe you need dual link adapter that is a single link.
http://www.amazon.com/Accell-UltraAV-B087B-002B-DisplayPort-Dual-Link/dp/B002ISVI3U/ref=sr_1_4?s=electronics&ie=UTF8&qid=1322884412&sr=1-4

 

[acrunner71]

I believe you need dual link adapter that is a single link.
http://www.amazon.com/Accell-UltraAV-B087B-002B-DisplayPort-Dual-Link/dp/B002ISVI3U/ref=sr_1_4?s=electronics&ie=UTF8&qid=1322884412&sr=1-4

that one is regular displayport. would the mini displayport equivalent be:

http://www.amazon.com/Accell-B087B-003J-UltraAV-miniDisplayPort-Dual-Link/dp/B0030XMREG/ref=sr_1_1?ie=UTF8&qid=1318381795&sr=8-1

According to amd my current one should support up to 1920x1200. Why is it that i have to get this more expensive one that supports up to a resolution that i don't even need to go that high?

 

[rolli59]

If it says on it that you it supports up to 1920 x1200 then either there is something wrong with it or you are doing something wrong.

 

[acrunner71]

If it says on it that you it supports up to 1920 x1200 then either there is something wrong with it or you are doing something wrong.

what could i be doing wrong?

 

[rolli59]

Nothing that I know off! Check if your refresh rate is set at 60Hz! http://www.accellcables.com/products/DisplayPort/DP/mdp_dvi_sl_active.htm