Matt.
Will try 8 core @ work tomorrow, just ran similar test on old PPC dual core G5 ( Dual 2Ghz, Mac OS X 10.5.2) @ home similar results but not quite such a drastic differential.
TGTP 1.9.88.1 7 min 02 secs thread min set to 0
TGTP 1.9.88.1 7 min 04 secs thread min set to 1
TGTP 1.9.88.1 6 min 57 secs thread min set to 2
TGTP 1.9.04.1 5 min 55 secs
On Vista PC - Home Premium (Dell XPS 210, Intel Core 2 6300 1.8 Ghz, 4 Gb RAM ) Time to render 2 mins 27 secs ! (TGTP 1.9.88.1, 2 threads) 4 mins 27 secs (TGTP 1.9.88.1 1 thread)
As a side issue, even though I have purchased Deep+Animation, the version running under Vista still won't let me access the animation features.
(No great panic on that one, just a heads up)
Rgds
Chris
Doh .. you said max threads... too late tonight.. will repeat tomorrow !!