My laptop rig made from parts: Dell Precision M6400:

Upgraded to Intel Core 2 Extreme X9100 dual core @ 3.06 GHz (can be overclocked to 4GHz stable)

Upgraded to ATI FirePro M7820 NOT M7740 as stock [(overclocked @ wapping 1005 MHz core clock and @ 1200 MHz memory clock. Stock: 700 MHz core clock, 1000 MHz memory clock) YES THIS IS POSSIBLE IN THIS LAPTOP!]

Upgraded to Two 125Gb SSD hard drives

Upgraded to 8Gb DDR3 1024MHz RAM Memory

Upgraded to Windows 7 Professional 64bit

Desktop rig (Not as amazingly impressive in my opinion):

Intel Core I5 quad core @ about 4GHz (can't remember really now)

NVIDIA GeForce GTX550ti SLI (Overclocked to 1000 MHz each)

I think it has a 750Gb hard drive if I remember. (not SSD)

I think about 16-32Gb DDR3 1333MHz-1600MHz RAM Memory

Windows 7 Home Premium 64bit