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Mac Benchmarks > iMac Benchmarks (PowerPC)
Update Published April 7, 2026
Geekbench 2 benchmark averages for all compatible iMac models with a PowerPC processor are listed below (1996-2006). The earliest iMac G3 models are not compatible with any version of Geekbench.
EveryMac.com diligently has hand compiled -- and independently averaged -- these Geekbench benchmarks from aggregate user results submitted to Primate Labs for each PowerPC iMac. This data is unique to the EveryMac.com website.
Via a combination of our own custom algorithm for automated analysis and manual human review, benchmark results that are significant outliers, inaccurately tagged, not running the macOS, or otherwise errant are omitted prior to calculating an average. For many models, EveryMac.com runs Geekbench software directly on one or more devices, too.
On PowerPC iMac models, the Geekbench 2 benchmark provides 32-bit performance using all processor cores. Late PowerPC iMac models provide 64-bit performance using all processor cores, as well. Subsequent versions of Geekbench are not supported. Higher numbers are better.
Geekbench benchmarks also are provided on EveryMac.com's specs pages for all PowerPC iMac models and within the Ultimate Mac Comparison feature.
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