1. fits PCI Express x16 graphics adapter, as written on the mobo next to the socket.
2. Is heatsinked rather than fitted with a fan (personal noise preference)
3. Can be powered by the stock power supply (see below)
4. is quite low budget, this machine is pretty worthless nowadays
It's a Thinkcentre A60, machine type 9374, model A3G. The processor is a 1.8Ghz AMD Sempron 3200+, and it has 1 gig of ram. Here's the power supply label:




