Quote - If I uncheck Reuse indirect lighting and let it run through a Prepass, the total render time on my computer is 35 seconds.

Yup, that matches my experience. My i930 is definitely a lot slower than  your monster. Seems to be about a factor of close to 2. Makes sense because the Passmark score igives a factor of 1.79. The RadiosityRoom is the worst of the three scenes (It is the fastest to render, but also the worst in direct comparison to your time). Here are my current values:

Seychelles: 10'16"

Cloudshadow: 4'35"

RadiosityRoom: 1'13" with reuse IDL and 1'29" without.

Can you please package your computer in a nice sturdy box and send it over? :thumbupboth:

Ciao

TD