TFX PSU For VSFF Build

Solution
I'm afraid that there isn't any TFX power supplies that will be able to power that system, at best you're only be able to get a GTX 950 up and running together with your designated CPU.

kwa-e

Admirable
This could work.
http://www.amazon.com/16X-PCIe-Riser-Controller-Motherboard/product-reviews/B00CWGPY9M/ref=cm_cr_dp_see_all_btm?ie=UTF8&showViewpoints=1&sortBy=recent

But this unit has better quality and is shielded, which means that it has no chance of interfering with your components and prevents any shorting from occuring.
http://www.digikey.com/catalog/en/partgroup/pci-express/30025

And I've done a bit more research and there is a PSU that will be able to support a GTX 970 AS LONG as it has only one 6+2 connector and it's this unit.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=417

Also modular to boot
 

kwa-e

Admirable
It all depends on the games you are planning to run, if it's AAA titles like Witcher 3 and the like then I'd say no (Yes if it's just medium-high settings)

But if it's titles like league of legends and CS:GO then it should work flawlessly.
 

kwa-e

Admirable
There are two cards, one made by ASUS and one by Gigabyte. I wouldn't go for the gigabyte model as they skimp out on the RAM, going for cheaper modules and the build quality isn't the best. Asus ftw~

Sadly there aren't any ITX variations for the 980 and 980ti's.