cant get 3 way sli maximus v extreme

kakaro

Honorable
Oct 11, 2013
25
0
10,530
I cant enable 3 way sli on my maximus v extreme,only 2 way.when i try 3 way sli only one card is detected in bios gpu post,an in nvidia control panel.the manual says for 3 way put card in slot 1,2a an 3.the thing is all fans an voltage led is working.am i missing somthing to do in bios.plz help.ive tried updating mobo bios,card driver,reseating card swapping cards,clear cmos button,remove cmos battery.my spec.maximus v extreme,i5 3570k,16gb corsair vengence ram,h100i 3 asus 60 ti dc2o,600t,antec 900w high current gamer psu.