I bought an Advent T12 a couple of years ago ....
P4 3.6 GHz
512mb DDR RAM
Nvidia 6610XL graphics
Last week I got a bit carried away and upgraded it with the following ....
Intel Core 2 Duo 2.4GHz
http://www.ebuyer.com/UK/product/112706
Which meant a new motherboard (MSI G965M)
http://www.ebuyer.com/UK/product/121045
Which meant new DDR2 RAM
http://www.ebuyer.com/UK/product/111439
Then to round it off a new BFG 8800 GTS OC graphics card.
http://www.ebuyer.com/UK/product/131673
Can't quite believe I spend £200 on a graphics card. But it's actually really good fun taking out all the innards and re-building the thing.
Anyone else into building PC's? Now I want to try to overclock my CPU .. aparently it'll run at 3.0GHz all day long.