Other World Computing- Item Info:
“OWC MercuryZ533+ G4/450-533MHz Altivec Enhanced ZIF w/1MB L2 Cache. ‘Hi-Temp’ G4/450MHZ CPU Tested and guaranteed for G4/533MHZ operation in all PowerMac G3 Beige; G4/500MHZ operation in PowerMac G3 B&W,G4 ‘Yikes’ PCI Models. New, 2yr OWC Warranty. (OWCZG4450B533) “
It is just a 500 MHz G4, but it would be an improvement over a 350 MHz G3.
[Posted with ecto]