HD7950 CF or Not for 2k resolution ?

Hello Friends ,

I want your suggestion on HD 7950 Crossfire setup . Currently i am using Sapphire HD 7950 Vapor X, thinking to buy another one and do CF.

Is CF HD7950 a good idea? Will i face any like drivers, micro-stuttering, lag etc ?

My System Specs :-

Intel i5 3570K
Asus P8Z77-V Pro
Gskill Ripjaws X 12 Gb 1600Mhz
Thermalright Archon
Corsair TX 650M
7950 Vepor X
Seagate 500Gb + WD 3TB LG DVD RW
Dell U2515H
CM HAF 912 Adv.
Logitech Z906 + Asus Xonar STX

Please give me your valuable suggestions.