Upgrade RAM on a G3 iMac (iMac G3 DV)
Difficulty level: quite easy

Replace the Hard Drive on a G3 iMac (iMac G3 DV)
Difficulty level: medium

Replace or install SoDimm RAM in imac G4 (iMac G4, all models)
Base memory expansion
Difficulty level: low

Replace iMac G4 internal RAM Dimm module (iMac G4 17" 1GHz, or similar)
Replace internal DIMM module.
Difficulty level: medium-low.
Note: this operation could void warranty.

Replace Hard Drive and/or Optical unit (iMac G4 17", 1GHz)
A picture guide to one of the most complex operations on a G4 iMac.
Difficulty level: high.
Note: this operation could void warranty.

RAM update on iMac Intel (y2006 DualCore iMac)
Difficulty level: quite simple