Thanks for the response Brian. Afraid you’re ahead of me on some of these variables.
I can provide this information to you – does this help?…
My 2009-ish 12 Core:
2 x 2.93 GHz 6-Core Intel Xeon
16 GB RAM 1333 MHz DDR3
New Cylindrical Mac Pro:
2.7 Ghz 12-Core Intel Xeon E5
16 GB RAM 1867 MHz DDR3
Both machines show 24 buckets when rendering.
Beyond this, I’ve left the preferences alone for both machines within C4D.