Ok guys i need help about chosing what card to get from this 3,i plan to mine whatever is most profitable
https://www.asus.com/rs/Graphics-Cards/ROG-STRIX-GTX1070-O8G-GAMING/specifications/
http://www.gigabyte.com/Graphics-Card/GV-N1080G1-GAMING-8GD#sp
https://www.msi.com/Graphics-card/GeForce-GTX-1080-ARMOR-8G-OC.html#hero-overview
prices
533 eur
589,00 €
556 eur
was leaning for gigabyte,other components are evga g3 1000w asrock pro btc h81,120gb ssd and 4gb ddr3 ram 1333hz

can my evga g2 750w gpu power this or is it to much?solo mining and some undervolting
asrock pro btc with g3260,2x4 gb ddr3,120 gb  ssd,2x rx 570 nitro+ and 2x rx 570 pulse

Hi forum i am in need of your help,i am moving to a student dorm where i would have free electricity in a few days and would like to setup a eth mining rig with 2x rx470 8pin sapphire 4gb cards.So i need your help about what motherboard and psu to get,was planning to use my old i3 cpu with 1155 bracket and 2x4gb 1333 mhz ram+1tb sata 2 ssd and old mini atx tower.Yes i know i could mine much more with pro btc mb and 6 cards but my room doesn't have space or ac to support it .Motherboard can be second hand and I don't plan to expand rig in the future so there is no need for a 1200w psu.Thx in advance