The link you gave is dead.
I see that G73's are running 2560x1440, and the 560M chipset is also capable of that resolution, as is HDMI 1.4 cables.
So, are you just repeating the specs or do you ACTUALLY KNOW if the G74SX will run a 26+ 2560x1440 display?
Also any chip supporting 3D must also support the HDMI 1.4 spec, which one would conclude means that it also supports the 2560x1440 resolution.
Please read this:
http://rog.asus.com/forum/showthread.php?16789-2560x1440-on-G73Is there any way to verify this.... simply repeating marketing materials is not very helpful.