Mine's kinda old now actually...
Windows 7 Home Premium (x64) on one partition
Windows 8 Release Preview (x32) on another
750 gig hard drive
6 GB Ram
First Generation Core i5 3.20 ghz (x2)
Don't remember my model but I have 512 mb on my graphics card
1600 x 900 monitor.

Technology progresses so fast nowadays,
but my computer still runs pretty smoothly for all the things I download onto it.
I would've expected it to be laggy and inefficient by now.