Recently upgraded, had this for a couple of years now, I'm not much of a computer nerd, so might struggle to tell you the finer details sorry,

Here's the specs on the box:

From memory the processor is an AMD , Dual core, pretty sure it was a 2.8 or 3.0 ghz.

Socket 939 NVidia Nforce ultra Ht 1000, dual channel, Dual channel DDR 400 PCI-e x16 Support sata 2 (3Gb/s) Drives Support AMD Athlon 64 x2 CPU

Comes with all the required discs, box in good nick.

*** please note the original ASUS chip fan stopped, at the moment it has a heat sink, which doesn't do the job ( computer will shut off automatically as it needs a fan to cool it properly), so you would need to whack a new little chip set fan on it.