Thanks! Now I have a question about the motherboard you posted:
1- Does it support PCI video cards? I ask that because I bought the new video card literally a week ago and would rather it not go to waste
The board I posted supports PCI and PCI-E (express) cards, but not AGP interface. In the case of a >>PCI << or perhaps even an AGP 8400 cards, the boards integrated graphics would come close to matching the video card's performance.
The Intel 845 chipset does NOT support PCI-E graphics, so your video card would NOT work if it is, in fact, an AGP interface
2- Would it fit inside the Dell case I have or would I need a new case?
The motherboard I posted is a "Matx" (Micro ATX) form factor. This would fit in most manufacturer's pre-built computer cases. There are some cases where this might not be true.
You could also post this question in a separate thread worded as follows, "will a standard Matx board fit in my Dell Optiplex case". There are techs in this forum that could probably a quick, one post answer since they work on these machines all the time.
So, it might also be a good idea to research your motherboard manufacturer's website for the specs on your particular board.
As a note, you should be able to use your current PSU, Hard Drive, and optical drives with the mobo I pointed out. You would have to buy new memory modules,(You board take "DDR RAM, (the current standard is either DDR2 or DDR3), and your copy of Windows would probably have to be replaced.