Sonnet Technologies today announced the new Encore/ZIF G4 700MHz processor upgrade for Power Mac models with “ZIF” (Zero Insertion Force) processor sockets. The US$349.95 upgrade utilizes the 745X series of Motorola G4 chips and has 256K L2 and 1MB L3 cache. It is compatible with beige G3 Power Macs and is expected to ship later this month. A 1.0GHz Encore/ZIF G4 upgrade ($499.95) was announced earlier this year for the same models.