Windows 7 Ultimate
Intel i7 4770k Haswell CPU
Samsung 840 Series 254GB SSD (boot drive)
Caviar Blue 1TB Drive
Caviar Black 1TB Drive
16 GB of G-Skill 2400MhZ (not sure the model but I can find out)
MSI GD-65 Gaming Mobo
Fractal Designs Defiine R4
May be some typo's above because I don't have the parts list on me but I can find out if it's relevant. But basically I do a lot of video editing work/graphics in Sony Vegas, Adobe Premier, Adobe Photoshop, Adobe After Effects (All CS6) and I also love to game. Most common games I play: BF4, AC:Black Flag, L4D2, GTA 5 when it is released. Anyways... I am running a 6010x1080 display (triple monitors with Nvidia bezel correction) and I would like to see some improvement in FPS for my games and maybe render-time improvement using CUDA's... would going x2 way SLI help? And if so, how much? Currently I run BF4 on all 3 monitors on high settings with around 50-70FPS. Want to get the best out of this PC. Also, I'm assuming the second card would also have to be 2GB, if not let me know! Thank you!
Anyway, if don't mind only increasing gaming performance - go with double 770. Since that is better for you price wise. But if your video editing is important for you and you want to make it a bit faster - get the 780.