The common types of video slots on the motherboard are (going from pre-historic to current) are:
- pci-e x1
- pci-e x16
So it depends on your specific motherboard what kind of cards would be possible. Just have a look in the technical documentation or on the support.dell.com (use the machine specific tag) or open the case and see.
It's somewhat doubtful if it is a good idea to spend any money on a 9-year old PC. Why do you want to to that, and what's the purpose you want to reach?
This is all going to sound really stupid, but I've never installed a video card before and I don't even know where to begin in finding out which one's compatible and which one isn't. Something about PCI? lol. I need help, as you can see.
Model number: DHM
OS: Windows XP
Manufacturing date: 06/04/03
CPU: Intel Pentium 4 2.40GHz
Motherboard number: 02X378
RAM: 1 GB
Current video card: Intel 82845G/GL/GE/PE/GV Graphics Controller
If there's any more information that I missed, just let me know. Thank you