Single Thread = 7.074997
Multi Thread = 4.492
Multithreading resulted in 36.5% speed increase.
Multithreading IS recommended for this system.
Intel Xeon 3.4ghz
2GB RAM
Quadro FX 4500.
I tested my Averatec C3500 Tabelt PC
Single Thread - 16.986023
Multi Thread - 16.750977
AMD Atholn XP-M 2200+
512 Ram
Got my new computer today, a dual Opteron 285 (4 threads) and did the benchmark…
Single = 7.461
Multi = 4.754
Not as fast as I expected but Zbrush only uses 2 threads wich is only one processor on a dualcore cpu. At least I can render my displacements in Maya at the same time I doodle in Zbrush 
/Basura
jus tested minedemo out an got this
s=9.702999
m=6.068
37.4% speed increase
on a amd 3800+ dual core
2gb ram
Single = 4.75
Multi = 3.125
Single = 4.75
Multi = 3.125
Mac Pro 2.66 with 2 gigs of RAM.
Running Windows XP Pro via Apple’s Boot Camp.
I can honestly say that I emptied my wallet and filled my shorts!!
Now, I’m off to run screaming into the night!!! 
Single = 5.806
Multi = 3.631
Core 2 Duo E6400 (2x 2,13GHz)
2GB PC2-5300 RAM
GF6800GT
I’m just waiting for the core2duos to come to notebooks so I can buy one… Would be a shame to run 32 bit just when Vista is comming so soon… dougt, are those scores from the winxp or mac version of zbrush?
Single Thread: 9.064972
Multi-thread: 5.5
39.299999% speed increase.
Pentium D, Dual Core 3.2Ghz
1 GB Ram
Geforce 6600 GT OC
2Gb of RAM and an ATI x1900xt coming soon, should spice things up 
The stats are from Zbrush on XP Pro. Unfortunately Zbrush doesn’t work on the Intel Macs untill 2.5 is released as a Universal Binary. From what I’ve read, 2.5 will be able to handle quad processors (or more?) and all the ram you can throw at it. Let the bells ring out and the pigeons fly!!!
single- 4,091
multi -2,679
34,5% increase
on
Core 2 Duo E6600@3,1Ghz (30% OC, not maxed out by far but im not greedy)
2Gb 6000
New mini workstation, must say that Core 2 Duo 6600 is amazing, soo easy to OC anyone can do it and the price is very good. Stable also.
Single = 5.52
Multi = 3.72
32.5% speed increase
Two quad Xeon 5345s at 2.33 Ghz (of course using just 2 of the 8 cores)
2 GB DDR II at 667 Mhz (actually 4 GB but running in sparring mode)
Windows XP Pro
Needless to say my credit card cried out in pain and snapped into several pieces before vanishing in a puf of smoke. I have also suddenly developed a taste for pasta with clear sauce, i.e water. Yummy.
i new to zbrush, i have a labtop and did the test.
Single Thread = 10.14
Multi Thread = 10.27
is this good or bad, and if its bad how can i improve it???
thanks
Single Thread=5.389
Multi Thread=3.471
35.59% speed increase
Two dual core Xeon 5140 (2.33Mhz)
4 GB ram 667Mhz / 7900GTX
Raptor 150GB/10k rpm for swap files
MacMini core duo 1 intel 1.67ghz
2 threads: 11.8
1 thread: 19.3
38% increase
single: 8.658
Multi: 5.453
37% increase. Not bad for a sucky dual core
Pentium D 820
2 gb 667 mhz RAM
Geforce 8800 GTS
single thread = 9.913
multi thread = 9.994999
Multithreading resulted in -0.8% speed increase.
Multithreading is not recommended for this system.
AMD 3200 Winchester (pre Venice core) 64 bit single core (scores better stock than the 3200 venice, although the venice can be OC’d to a better degree than the winchester)
3 gig low latency Mushkin 400 FSB ram in dual channel mode
Gigabyte mother board [color=Lime]GA-K8NS Ultra-939
My system is just turning 2 years old and is rock solid (although not as powerful as whats out on the market its been a sick performer when concerning Zbrush, Maya, XSI, After effects, Photoshop, Corel painter, C4D, CAD, VUE, etc ) I will admit that the Core Duos are a thing of wonder for the moment, but dont count out AMD just yet. I hear the OctaCoreTM is soon to be announced :)~
PS: (just kidding)
3.956
2.56
35.2% increase
Gateway FX 530XM factory overclocked Quad core 2.66GHz running at 3.2 GHz
2 GB Ram
7900 GT
Win XP pro
Single = 7.456
Multi = 6.605
11.4% Increase.
Intel Dual Core P4 3.2 GHz with 2 GBs RAM Windows XP Pro 32 bit.
Even with these numbers ZBrush crashes when I reach 4 Million+ polys.
Single Thread = 5.132
Multi Thread = 3.235
36.9% increase
Intel Duo [email protected] 4Gb ram
Vista x64 ultimate