DP1.2-MST compliant device?

Just purchased two new U2414H monitors and hooked to my desktop using a Dell 9TCD9 GT330 video card through the display port.  Unfortunately, have been unable to get both monitors to be recognized even though I have enabled DP1.2 support in each.  I now suspect the video card is not DP1.2-MST compliant.  Can anyone confirm?

Thanks