SLI has pretty big scaling issue with some games, with some not supporting it at all. Games that support it properly, seem to get a tiny leg up on the dual 970's, however they are cherry picked benchmarks. There is also the drain on your PSU and the extra heat you bring into your case.noiseredux wrote:to anyone who has done any research on the matter, what is the general thought process behind GTX 900 series in SLI versus the 1000 series? I don't actually feel a need to upgrade but just keeping this knowledge in the back of my head. I could add a 2nd Zotac 970 to my rig for ~$200... but how would that perform compared to a 1070?
You would also hit the 3.5GB buffer wall, which would restrict a lot of the extra power from your card. Meaning using things like AA, high res textures, advanced lighting, shaders, etc. Would all leave you close to where you are now.
I just can't see any reason to SLI 970's, investing into 3.5GB of VRAM is not a smart idea anymore, you would be investing in being stuck at 1080P (or 1440P if you lowered VRAM heavy settings).
You are far better off to sell your 970 and use the money towards a GTX 1070, get the higher performance with perfect scaling (as it does not have to do any) and the 225%+ increase in available VRAM.
Obviously just my opinion.
EDIT:
If I was you I would sit this generation out completely. If you are gaming at 1080P@60FPS. The GTX970 will hold you without any issues at all and when you get to the point where it won't anymore, the 3.5GB will bottleneck you anyway, meaning SLI is not a viable option.
