2d Surround Nvidia - 2 differents Monitors and GTX 770 4GB - Issue

[leoitaipu]

Hello,

I have been studying about applying 2 monitors in gaming and I have bought a GTX 770 due to the fact I don need a second video card in SLI for 2d surround. However, yesterday I installed and didn´t work. I have two differents monitors, as Samsung syncmaster Z2233 and Samsung HDTV T24C310. I have apply same resolution on both monitors (and frequency 60hz) to 1680x1050 (32 bits colors) but still the box for surround is not avaible to be checked. I am using 1 DVI and 1 HDMI.
Is it mandatory same monitors model for 2D Surround?
Any thoughts or directions?
PS: is there any way for me to double-check if my videcard clock is 4GB in Windows 8?

 

[mouse24]

I am almost positive surround only works with 3+ monitors.

 

[Gameduck]

Surround is only for 3 monitors or more and the VRAM Amount can be checked with something like MSI Afterburner or ASUS GPU Tweak.