I see the last reaction is of januari 2016 but I'am still interested in this subject.
I am living in The Netherlands (sorry for the incorrect English) and do a lot of nature filming. Since end 2015 I film in UHD with a Panasonic HC-VXF990 connected to a Kowa TSN 883 Telescope. When I come home with a lot of material I first select the parts I want to keep. Important for me is to do fast skipping of the material. I than make short films of the selected material per subject(bird / animal / place). The rest of the material I delete. Important for me is the performance during editing and not the ammount of effects. In the past I chose Powerdirector for its performance.
I have been wondering a lot of times what is the best computer for editing with, at this moment, Power director Ultra 14.
I still use an older I7 3770 computer with 8 GB of RAM, several SATA disks, Samsung EVO 256 GB SSD systemdisk using a GTX750 card as well as build in intel graphics 3000.
At this moment I film with a panasonic HC-VXF990 UHD cam and I do a lot of editing for a friend which films with a sony TD20 3D camcorder in so called MVC format (3D full HD 50p)
My UHD films are rendered in X-AVC S format 25p 60Mbps.
The 3D films are rendered in 3D, H264 AVC, m2ts, 1920 * 1080 50p, 28mbps or to Bluray files in AVC format.
These formats give the best results on LG UHD 3D TV's of 55" and 84" we use.
During the past years I did several tests with these formats on different computers. One of the last systems I tested was a "heavy" one with a I7 5775C, 16 GB RAM, IRIS Pro graphics 6200 and Samsung pro 500 GB SSD and SATA 600 disks and the latest MSI motherboard.
I did several heavy tasks with projects with light/color enhancements etc. The performance enhancement of different types of videos was average 30 % to max 40 %. What amazes me the most is that when I look in taskmanager at the load of the CPU this is about 100%. The memory used by PD 14 was max 4 GB(?????) and the diskload never was over 50% (??). What conclusion I may take with these figures is a big question for me.
I did the same test on a I7 6700K with a GTX 970, 32 GB RAM and Samsung PRO SSD and this system performed 10% worse than the 5775C.
Looking at Passmark tests my old I7 3770 (9342) compared to the I7 6700 (9954) is still not outdated.
What is important for me!
Looking at all kind of systems I conclude that the most important for me in a video editing system is the performance during editing. I mean the reaction on mouse and keyboard and the smooth playing of the video, including corrections during editing.
The time a system needs to create my film at the end is not so interesting for me.
What amazes me is that when I'm editing a project it often looks the system is hanging. It stays death for several seconds (look like minutes). When I look in taskmanager the load of the system/disks/memory is low but Powerdirector is getting no attention.
How much this is caused by modules like PDHanumanSVr or interrupts by windows, I don't know. In that situation using the keyboard or the mouse too much often causes PD to hang.
The big enhancement of a dedicated Graphics Card, much RAM I haven't seen yet. Last week I tested a I7 7700 system with a Nvidia Geforce GTX 1060 6GB card and 32GB RAM. The realtime performance wasn't better than with this card removed, using the build in graphics Intel® HD Graphics 630 of the I7. During rendering it used max 5 GB of RAM!! 3D didn't even function correct with the GTX and PD14 so we removed this $ 300 card.
Is there anyone (specialist at cyberlink?) who can say what realy does matter looking at realtime performance during editing of UHD in Powerdirector 14 / 15!!!