Other World Computing today introduced the Mercury G3/533MHz and G4/550MHz ZIF upgrades for the PowerMac G3 Beige, G3 Blue & White and G4 “Yikes” models. The new Mercury ZIF are plug-and-play upgrades, that are fully compatible with all Apple hardware and software. The Mercury G3/533MHz ZIF is priced at US$219.97 and the G4/550 ZIF is priced at $259.97.