Hi Forum Folks,
I am attempting to convert a photo & video editing machine out of a retired gaming PC which uses a 780Ti SC (03G-P4-2884-KR).  
My trusty 780Ti has performed great throughout the years but I'm wondering if it is capable/worthy to drive 2 desktop DVI monitors plus (coming tomorrow) a Dell UP3216Q UHD 4K monitor - all at the same time in a 3-mon rig running on Win 10(?)
 
I don't care so much about the resolution/refresh of the 2 desktop monitors being maxed as they'll be just that - the Windoze desktop and open application space but I do care about the new Dell monitor's resolution being fully exploited at 4K UHD (3820x not true/DCI 4K) at 60Hz for editing and final output review purposes.  Thanks to the usually needed Windows scaling in a single monitor setup, I plan to use the smaller monitors for those things that would just be too small to not be annoying with scaling turned off on the big monitor.
 
The big monitor set me back a bit in the wallet, as you can imagine but the parameters needed for proper photo/video work necessitate the investment.  Since my budget is mostly eaten by the new monitor, I'm looking to get both systems in working order with little to no further outlay, if possible. 
 
I'm fortunate to have options...
I can rob my current "gaming" rig of one of its twin 980Ti Classy cards (SLI) if needed until I can save enough pennies and/or they become available here on evga.com) to get a 1080Ti for at least one of the machines but that does leave my 3-screen gaming system a bit strapped for workload.  Another option could be to reduce the media editing PC's format to a 2-mon config (single desktop monitor and the UHD monitor), if necessary but I can't really go below 2 screens on that rig.
Plus if I split the 980's up, that means the future 1080Ti (when it eventually does come) will kinda be forced into the editing PC so the 980Ti can return to its SLI pair, again making the gaming PC "suffer", if it can be called that.  The gaming PC is actually used for driving and racing SIM work, not games per se', so it's important that it not be overly crippled - it's a working PC not recreational.
 
Said another way, so you understand my situation better - I'm not a gamer but my work in motorsports that requires a SIM system is best served by a solid gaming rig, if that makes sense.  Right now with the two 980's in SLI, the SIMs I use push the "gaming" system hard enough to drive the fans up significantly, and the framerates and detail is certainly sufficient for my 3x1080p (5760x1080) config that wishes to be a 3x4K someday (read 1080Ti SLI?) but they could be a bit higher by my standards.  
 
OK, now I'm just babbling incoherently... At the end of the day, I'm likely to be spending much more time on the media editing rig than the SIM rig when in the office (I do the majority of my motorsports work on the road in the "real world").  And I feel I'm too close to the trees to see the easiest/least expensive way out of my conundrum/forest.
 
Suggestions?
 
Oh...
I guess another option would be to go with something costing/performing less than a 1080Ti, such as a regular 1080 or 1070 series.  Are the lesser cards good enough and capable enough to run all three monitors (1920x1200, and 1920x1080, and 4K UHD) fully at 60Hz for professional level photo & video editing and grading?  I also want to be somewhat future-proofed, not having to upgrade GPUs for a while.
 
Thanks in advance!!

I search replacement for GTX780Ti as well. Pascal GTX1080 or GTX1080Ti or RX Vega.
We will see, my best wishes are ASUS GTX1080Ti Poseidon or EVGA GTX1080Ti FTW3 Hybrid...
But price is big problem. Maybe I will need to satisfied with Founders Edition or GTX1080.
I have enough money for GTX1080. But somehow GTX1080Ti Founders is better performer than any GTX1080. It's different chip.
Why is price not 750-760 euro for GTX1080Ti. I really expected that NVIDIA will offer something in that range, when I heared 699 for GTX1080Ti I was hoped that I will buy one card, but price now look different, special in Europe.
If some option show up up to 800euro EVGA or ASUS I will take immediately. But only these two brands.
When I saw pictures of GTX1080Ti FTW3 Hybrid I knew that only price could separate me from that model.
I really suggest to anyone who don't want headache with temperature to buy FTW3 Hybrid.
That's Jack pot for 2017/2018. Fact that she arrive later only is better for customers who were patient because less chance for problems.
Someone could say go on 1080 Hybrid, but again that's same as 1080Ti reference. I DON'T KNOW.
But because at the end of month is my birthday I will buy some graphic card for me soon. Best possible chip will mean a lot because I keep GPU longer, GTX780Ti is used 3.5 years. More than I planned and it's really good because I switched from GTX780 Classified to GTX780Ti K|NGP|N.
 
 

Yea I'm using a 780 for a 3440x1440 monitor and it's fine for gaming, it's vram capacity could be higher though.

Yep, just figured out importing some 4K video into Resolve 14 and it makes a serious effort but at the end of the day, the old 780TI just doesn't have the steam to keep up.  Ordered a 1080TI today but to be honest, it may end up in my sim rig and I'll move one of the 980TIs in that machine to the video editor just to see how well the 980TI hangs.
 
Or, heck, who knows - I may just cut right to the chase and put the 1080TI in the editor...
 
Cheers,
C