Is a Sli configuration (2xGTX 770 or 2xGTX 760) too much for a 1920x1080 (144hz) resolution display? Does it make sense? Don't suggest me to buy a single GTX 780 or GTX 780ti because my budget doesn't arrive at these prices. The Sli is an option I'll consider in the future (one or two years).
Yes sli'ing those cards is a waste of power for 1080p You'll get better perfomance gains out of bigger resolutions. I'd suggest maybe getting the 2 760's and maybe getting a few more monitors with the left over.
Well if i understand you correctly, get the 770 and later if you want add another. 1st of all i've noticed a difference at 1080p in some games with cfx. However, with monitors becoming cheaper by the month, you may at some point want to go 1440p as i have.
I'd still get the 770 no matter what. It's comparable to my 280x in performance and i loved it on 1080p, especially in BF4, Metro, Crysis 3 etc. There ain't no future proofing when it comes to PC's (except PSU and Case maybe). My point is OP will play everything available now without to much drop in frame rates. Which is the difference between a great gaming experience or not. Also with 770 OP will be able to run much more screen candy on the real demanding GPU driven games.
He's asking about SLI sli'ing 770's for 1080p at that which is just in my opinion just not worth it. It's like buying a 780 ti and playing at 1024x768. Like I said get the 2 760's use the left over money to get 2 more monitors. Run 5760x1080p at least.
Senz, one important thing i got to mention is if your looking to SLI later and go higher resolution. You will be considerable better off with the 770 4GBs card. Or the alternative is 280x with it's standard 3gbs vram. The reason being if the frame buffer exceeds 2gbs in game you will know it.
I'm an Nvidia fan... So a 280x will not be an option and the 4gb 770 is now too expensive. Forgive me because I forgot to say that I'll connect the pc to a TV, which is in another room, too. They can be used separately right? If yes I think I'll get now a 770 (to be sure) and take another one in the future? Are two 760 enough compared to two 770?
I believe not. Especially if you want to max settings in game. The other issue I see is your not looking to sli for 1-2 years and during ng that time on a single card your gaming experience will be considerably improved.