more speed

[George Booth]

I have a G4/400MHz with 640 MB of memory & 19 GB hard drive. I am adding an
Apple 20" monitor and now need OS X.3 for it (been using 9.2.2 only). I
would like like to increase the speed to make photo CDs for family and speed
up my searching capabilities. Would going to 800MHz be enough & do I get
another 400 MHz card or an 800MHz (which seems more logical)? I don't know
what type of speed or memory card to get to eventually be able to make DVDs.
Thanks, george