PowerPC G3 processors are 32-bit RISC microprocessors designed by IBM and Motorola as part of the PowerPC architecture.
Used in the original iMac models from 1998-2003, these processors revolutionized personal computing and marked the beginning of Apple’s design renaissance. Built on 250nm, 180nm, and 150nm process technologies, the PowerPC 750 series (G3) featured clock speeds ranging from 233MHz to 700MHz in iMac configurations.
Key features included superscalar design with dual instruction pipelines, 64KB L1 cache, backside L2 cache (up to 512KB), improved branch prediction, and efficient power consumption for the era. These groundbreaking processors enabled the iconic original iMac to deliver capable performance for internet browsing, multimedia, education, and consumer applications.
The G3 iMac is historically significant as the product that saved Apple from bankruptcy, introduced translucent colored plastics to computing, eliminated legacy ports, and established the all-in-one form factor that would define iMac for decades to come.
