Hi Eving Traveller
Thanks for writing to us.
Below are few other graphics card which are compatible with your system.
nVidia GT220 1GB
nVidia M207 1GB
AMD Radeon HD 5670 1GB
AMD Radeon HD 5450, 1G
You can look for the ports specifications on the vendor website, before you decide on one.
The machine goes with only 300w PSU, so you need not worry about changing the PSU.