Not a mac but its what I got so I figured I'll try it.
Core2 Quad Q6600 (2.4Ghz)
Asus P5WDG2 WS Pro motherboard with 4Gigs DDR2-533
Nvidia 7950GT 512MB
73GB 15K SCSI boot drive, 36GB 15K SCSI scratch/temp
Adaptec U160 SCSI controller
Vista 64bit
CS2
29 seconds (29.31 to be exact)
Core2 Quad Q6600 (2.4Ghz)
Asus P5WDG2 WS Pro motherboard with 4Gigs DDR2-533
Nvidia 7950GT 512MB
73GB 15K SCSI boot drive, 36GB 15K SCSI scratch/temp
Adaptec U160 SCSI controller
Vista 64bit
CS2
29 seconds (29.31 to be exact)