Happy to accept it if it were true but in my case its simply not so! (moses handed me a tablet in stone with my case is cool so it must be true
).
The backplate traps heat under 4K thats a serious heat issue in some but not all current games! Mine even had way too much thermal paste on it & the screws attaching the HSF to the GPU were not even fully tightened up either they have losened with the high RPM fan vibration or were never fully tightened to begin with.
Now mine is under an G10+H55 AIO case temps have actually dropped 10-15C yet my case airflow is actually slightly worse
Its not just me either I found on other forums users in EU & US talking specifically about high temps with the MSI 6G & they have a multitude of different cases/airflow.
Some light bedtime reading for you here
have a look through these threads is everyone complaining about high temps using what you think is an inferior case!!
http://www.overclock.net/t/1561999/msi-980-ti-gaming-6g-card-overclocks-and-pictures/1180
http://hardforum.com/showthread.php?p=1041709270