ZBrushCentral

Multiprocessing thread settings and performance

I was poking around the preference palette and I noticed the following thread settings:

Lightbox: 8
Performance: 4
Decimation Master: 2

Based on my computer specs:

Dell XPS M1730
Intel[R]Core™ 2 Extreme
CPU [email protected] GHz
2.79GHZ, 3.0 GB Ram

Should they all be set to 2?

Does it matter if they are all at different settings and/or settings larger then my system can oblige?