Ok so I basically eBayed my 2x MSI 970s because the temps were crazy bad in SLI. My motherboard and case combo seem unfortunate, the alternate slots are the 1/4 size kind. MSI X99 Gaming 7. So my cards have to be like this.... (See Pic)
I ran 3DMark in a loop. No overclock. All stock. Had MSI afterburner monitoring and checked the max temps. The lower card hits 80*c, and the top 87*c. Though that seems to be a brief peak, it seems to hover around 84*c mostly.
I was considering returning as the jump in price from my 970s was significant and the temps aren't as improved as I hoped. I am pretty sure anything over 80*c causes throttling right? But I'll probably just end up eBaying them (as I'd feel kinda s****y just returning them for no reason).
I may just have to admit defeat, and drop the SLI idea. It's winter now. If they max out at 87*c in winter...... maybe I'll just hang in there for the next single or multi-GPU card
you know I was looking at the Titan Z but it's obvs due to be replaced soon and the 980s walk all over it in games.