XPS8910 i7-6700K crazy overheating case problem

My very first PC was a Toshiba 8086 in 1981 and I've had my face stuck in a computer ever since but I have never encountered a case as badly engineered from a thermal standpoint as the XPS8910. Between the woefully inadequate HSF and the GTX970 this system is trying to cremate itself. It idles at 47-49 C and running a single file through 7-Zip spikes the CPU at 86 C. The heat coming out of the top grille is excellent for frying your breakfast eggs. It is clearly a case problem as I've pulled the side cover off and placed a 12 inch electric fan right next to it and I'm now idling at 21-23 C and the same file zipping does not see a temp above 54 C. It's an awkward workaround but it's the only way to keep the system at anywhere near reasonable and safe temperatures.

Another question is that although I've read several threads here about placing an SSD as the data drive and leaving the 2TB platter/32GB cache SSD as a data drive, I'm still very concerned about the problems that many users are reporting. Is there a surefire way to make sure that this process actually arrives at a successful result?