Quote - "The funny thing is when the rendering reaches around 47 - 50% the computer decides to restart. If it were the temp, which are in the range above, the computer should restart at any given % complete."

Hmmm... This is a bad sign. It could mean your scene is corrupt somehow. This has happened to me, some months ago. Something got corrupted and I had crashes when rendering. In order to pinpoint the exact material or object, I rendered in small areas. I found that whenever the area would contain a specific material, it would crash. I replaced the material and that was it.

Render crashes are also fairly common (in my experience) if you have complex objects made out of boolean operations or metablobs. It's convenient to bake them as soon as the object is finished (after saving a copy of the unbaked object if you want to change it later).

An important thing: make sure you are running the last software version!