SLI 970 vs SLI 980, or other.

[cybhashcat]

Thank you for commenting, yes i am very new to this - trying to read as much as i can in the forum the learn.
Sorry, when i say SLI i just mean to say "Two cards"
Yes, i need to to homework since im not really 100% sure what "SLI" means - but for all intents and purposes i meant simply "2 cards"

About the "buy a reference card"i read your post here:
http://hashcat.net/forum/thread-3949-page-3.html
and you said, "if there is gaming in the title, it isn't reference"
does it also apply to this (looks 100% identical to Nvidia site):
http://www.amazon.com/EVGA-GeForce-Cooli...gtx+980+ti

Thanks again!