Will you be using three identical displays? Or will you be using a combination of different brands/sizes/resolutions for the displays? If you ever plan to do some gaming, this might make a difference.
As shown in the link I provided, I will be using two Dell 2007FPs on the outside (in portrait) with a single Dell U3014 in the middle (in landscape), and yes, the resolutions will be different - 2560x1600 for the center monitor, and 1200x1600 on the outside monitors.
I've heard of issues with Eyfinity in gaming with monitors of different resolutions, is that why you ask?
What sort of CPU do you use? You mention video editing, but not what software you use to edit. AE? Pr? Do you prefer CPU-based rendering against OpenCL/CUDA? Those are important questions to answer. Also, do you need 10-bit or 8-bit support for photo/video? That makes a large difference as well.
I am looking at either the i7-4790K or the E3-1231V2, or perhaps the i5-4690K if I do not need 8 threads, just 4.
I am no pro as far as editing at this point in the game, so I am sure that 8-bit will be fine for now.
I don't know about professional GPUs...so I'll just tell you about consumer GPUs that might match:
The fastest PASSIVE card is probably still the 750 /Ti. Goes into the 60°c area...but for a passive card that is impressive. It also manages decent 1080P gaming, as long as you don't expect ultra settings with MSAA.
The 750 comes with 1/2GB Vram and the 750 Ti with 2/4gb.
But if you just want quiet and cool....cards like the GTX 960 or 970 might be a good bet for you.
Many GTX 960 will naturally not use their fans at all until you reach a certain temperature.
And the GTX 970 can easily be configured the same way and a lot of very quiet versions exist, although not as quiet as the 960, obviously.
As for AMD...their passive side is really not all that impressive on the performance side...I think you'd have to go down to a R7 250 to get a passive card...and its' performance is rather sad nowadays.
R9 cards are generally a little on the louder side since their TDP isn't the lowest...so running it semi-passive isn't really working most of the time...but quiet designs might exist...some other people might have hints for you there...but I dont xD
Thanks for this. I am not concerned with passive that much as long as the active states are not loud. I work in quiet and find noise very distracting, hence why I would like something that is not noisy.