Just an ordinary dual core iMac running Deep Hiarcs. Can't compete with the Monster Prawn!
Post your beast.

Can anyone tell me how do we run those engines saved in rar files
Unrar them first with winrar, free edition here:
http://www.rarlab.com/download.htm
Here's my beast, custom made by myself:
i7 970 (overclocked to 6 @ 4.375 GHz)
Corsair H70 fixed loop water cooler (replaced the fans for Apache Black Silent PWM fans).
ASUS P6X58D-E motherboard.
24GB of 1600MHz Kingston HyperX RAM overclocked to 1704MHz
2 x NVIDIA 2GB GTX 460 in SLI
Boot Drive: 2 x OCZ Vertex2 60GB SSD in RAID0
Data Drive: 3TB Hitachi Deckstar.
1000W Coolermaster Silent Pro power supply.
Antec 902 case.
I had many a session putting this thing together and even a few beers.
Under construction and testing, on the kitchen table:
I'm pretty sure that I'm not the only geek here, so post your specs and maybe even a picture.