Which psu and motherboard i need to make nvidia 3way sli?

[Voliax]

Hello,

i have two motherboards asus z97-c and asus z97 pro wifi-ac.

2 processors i7 4790
4x 8gb ddr3 fury hyper-x kingston ram
3x 256gb ssd
4x 2tb hdd
650w cooler master psu
3x nvidia 970

now i want to build a new computer. if you have any idea to buy this and change with this i am open to it.

for now i just wanted to ask can i use 3x nvidia970? also i want to buy new psu i know i need it more than +1000w on 2 way sli i read it from manual. can you guys tell me which psu should i buy?

i find out i cant make 3 way sli. which motherboard should i buy now to make 3 way sli?

do i really need 3 way sli to gaming and video editing (after effects i am editing 4k videos) or you think 2 is enough?

 

[CTurbo]

I would not bother with 3x SLI. Sell your 970s, keep the rest and buy a GTX1070 or GTX1080 if you can afford it. Your i7 is still very very strong and doesn't need to be upgraded.

 

[Voliax]

I can`t sell them because of some situations. but i can buy new motherboard and psu. i am not sure about which psu should i get. 1000w is enough for 2 way sli? and i have so many hdd and ssd`s is it enough?