PB278Q only displaying at 1080P

[straylightx]

I just got dual PB278Q mointors

I have a HIS Radeon HD 6870 1GB Video Card
http://www.newegg.ca/Product/Product.aspx?Item=N82E16814161349

the monitor display is showing 1080P and not 1440P..
one monitor is connected to HDMI and the other is HDMI through a mini display to HDMI cable.

why is not displaying in 1440P?

 

[SinxarKnights]

Try one by itself with the HDMI. If that doesn't work try one with a DVI cable and see if that fixes it.