upgrading my computer

[littlealiens86]

I have a Dell Computer Corporation Dimension 4600i and the specs on it are as follows:
3.00 gigahertz Intel Pentium 4
16 kilobyte primary memory cache
1024 kilobyte secondary memory cache
Not hyper-threaded
1536 Megabytes Usable Installed Memory
Slot 'CHANNEL A DIMM 0' has 256 MB
Slot 'CHANNEL B DIMM 0' has 1024 MB
Slot 'CHANNEL A DIMM 1' has 256 MB
Slot 'CHANNEL B DIMM 1' is Empty
NVIDIA GeForce FX 5200 [Display adapter]
DELL 1707FP [Monitor] (17.1"vis, s/n 6418068800JC, August 2006)

Can I upgrade this computer with another motherboard to go dual or quad core?
What video card would you recommend for this computer?

 

[Shazer2]

Just be sure that everything is compatible, do some research.

I am currently using a dual core, and loving the speed of it. It only runs at 2.0GHz but that does the job plenty.

 

[JCB1]

sell your computer and then use the money to buy yourself a newer system, you should be able to pick up a better computer for 200-300usd