I recently installed a second GTX 980 into my system for SLI. I knew that the card closest to the CPU would default as primary and it would run hotter, but I became concerned when it was unable to boost higher than its base clock speed of 1126MHz due to thermals (the card with access to more air of course boosted over 1200). I tried hooking my monitor to the cooler card, but nothing output to the display.

Is there something I can do to give the hotter card a break? I want to either set the cooler card as primary or at least have the cooler card output to the monitor.