Adam – you mentioned somewhere that you were running Folding@Home. I have also been doing so, on a 2013 Mac Pro, and I notice that the matching of the background program to the host Mac is sub-optimal. As you know, there are three ‘power’ settings: Light, Medium and Full. On the Mac Pro, Light says it uses 3 cores, Medium 7 and Full, 8. On anything except Light my Mac gets very hot. Once I noticed this I installed the background app Temperature Gauge and now keep an eye on the core temperatures. No help for your horrible SSD issue, I know, but something Folding@Home users should be aware of, as by default there is no core temperature monitoring on Macs.