Upgrade G4 400mhz Power Pc

[krbmedia]

How would I go about upgrading the processor on this machine? What the board can take.

Can it be done simply without paste?

Any recommendations on where to buy a processor?

 

[DeltaMac]

Here's one good site - http://eshop.macsales.com/shop/accelerators/

Upgrades from about $100 to about $700, depending on the G4 model that you have. There are 3 different PowerMac that came with a 400 MHz processor.