Results using Skidmarks GT, a benchmarking utility that's part of Apple's CHUD performance tools, suggest that the new G5 chip is nearly three times faster than the G4 at floating-point calculations.

The test run by Think Secret provides a rough comparison of G5 and G4 performance. The Skidmarks scale has "100" equal a Power Mac G4 at 1GHz. The Dual 2GHz received scores of 172 for integer performance, 270 for floating point performance, and 208 for vector performance.