SLI 2x GTX 980 or a GTX 1080 ?

[HappyShadow]

I'm buying a new PC, and I have this doubt.
2x GTX 980 EVGA SC
or
1x GTX 1080 Gaming MSI

What do you think guys ? Excluding prices, i just want to know whitch options can get the better performance

 

[HappyShadow]

MERGED QUESTION
Question from HappyShadow : "SLI 2x GTX 980 or a GTX 1080"

I'm buying a new PC, and I have this doubt.
2x GTX 980 EVGA SC
or
1x GTX 1080 Gaming MSI

What do you think ? Excluding prices, i just want to know whitch options can get the better performance

 

[monsta]

The GTX 1080 is the better choice, it out performs the 2x980 SLI. The 1080 will be easier to deal with being a single card, less heat, less power draw and better performance and not aLl games are SLI enabled. Stick to the single faster 1080.
http://www.pcgamer.com/gtx-1080-review/

 

[jasonbarron]

If my motherboard can equip a gtx 980 will it work for a 1080?

 

[maxalge]

If my motherboard can equip a gtx 980 will it work for a 1080?

if your case is big enough yes