I know that the more VRAM, the better support for higher resolution, and therefore better for multiple screens layout.
So the GTX780 is stronger, though has less VRAM.
Would you suggest the 770 4GB or 780 3GB for multiple screens?
And regarding the cooling system, would you suggest a fan that is blowing the air outside of
the case, or keeps the air inside?
I am using the Fractal Design R4 which doesn't have the best cooling structure.
Graphics cards do what they do, and the GTX 760`s SLi beats every GTX 780 and Titan out there for the price of a GTX 780.
Getting 2 760's would be great, though i'd have to change my PSU as well, which then comes to the price of just getting 1 780.
I have the SeaSonic X-660W, and 2 760's require a minimum of 700W.
Also, not every game "enjoys" the benefits of an SLI/CrossFire and that could be a problem for me..
Not to mention that problems do occur when it comes to the SLI/CrossFire drivers..
Your PSU would do SLI 760, not even cutting it close. SLI is relatively problem free, but I get your concerns.
780 is the obvious choice in your case, VRAM doesn't matter until its filled up, even with 3 screens you wont be filling 3GB.
His Gold Standard PSU would almost certainly be fine if he just has a normal PC set up;
......................I went for a Platinum PSU for long term efficiency and smooth and stable supply to the Z87 Sabertooth M/B and i7 Chip.
As for SLi or Crossifre issues; that is a False Flag argument these days, ESPECIALLY if you have a decent M/B rig and monitor.
I have never seen ANY issue to do with Crossfire except for one game *RAGE* and all I have to do is spend four seconds pressing a button that says @DISABLE CROSSFIRE@ or SLi.
Battlefield 4 runs BRILLIANT in Crossfire/SLi so does old games like HALF-LIFE 2, Quake 4, PREY, Deus Ex, Medeival 2 Gold Bioshock, Hitman Blood Money, Fallout 3 G.O.T.Y. etcetera etcetera, and I have run more great online Steam games with Mods, with no problem *such as SKYRIM Ledgendary.
Seriously; the Crossfire/SLi issue is a load of old cobblers.
Just run any RARE game that only works well on the single card only, if its not coded for the hundreds of thousands of customers *If not Millions* of gamers who have Crossfire/SLi setups,
ALL GAME CODERS KNOW MORE AND MORE AND MORE PEOPLE WILL HAVE CROSSFIRE/SLi RIGS IN THE FUTURE.
So; you can be pretty confident that games will run nice for the foreseeable future *i.e 5-10 years.