just for clarification sake

a yikes! has no AGP port ( brown slot on the mother board) its video card is in a pci slot ( white slots) and they are typically 350 to 450 mhz

a sawtooth has a agp port its video card will be in a agp slot and they are generally 350 to 450 mhz

a gigabit ethernet looks like a sawtooth but tends to be 500 mhz other then actually getting the thing on it looks just like a sawtooth

a digital audio is and i might be wrong there usually a dual G4 they tend to have massive heat sinks but i am not too sure about that

a quicksilver is quite easy to reconigse it has an unique new casing with foru ventilation holes just above the floor handle they start at 733 mhz

and lastly but certainly not least a mirrored door drive which is exactly what it is the drive doors are corverd woth something metallic that does mirrors to a degree they are unmistabakle and unmistakable loud too they are always dual G4's and the best G4's you wil fidn this side of a mac mini