GTX 970 SLI vs GTX 1070ti - Which one should I choose?

mushfiq563

Prominent
Dec 7, 2017
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I watched on youtube that GTX 970 SLI can beat GTX 1070 . I also watched that GTX 970 SLI can be defeated by GTX 1080 . GTX 1070ti also can be defeated by GTX 1080 and It also made defeat GTX 1070 . I am so confused . Which way should I go ? Please Help Me!!!

My Confiq(If Needed):

CPU : I5 8600k
CPU COOLER : Nzxt Karken x62
MOBO : Asus Prime Z370-A
RAM : 16 GB 3200MHz
GPU : GTX 970 SLI (USED) or GTX 1070TI
PSU : 650W Power Supply