Crescendo/NuBus G3 - 390-400 MHz - Power Mac 6100, 7100, 8100, Performa 611X, WGS 6150, 8150, 9150, Power 100,120, Radius System 100, 81/110

The Sonnet Crescendo /NuBus G3 and G4 processor upgrade cards accelerate your NuBus Macintosh to speeds you never though possible with these older Macintoshes. The Crescendo/NuBus incorporates the revolutionary PowerPC G3 or G4 processor and ultra high-speed Level 2 backside cache for astoundingly fast performance, delivering up to a 10x overall speed improvement.??Sonnet's groundbreaking Fortissimo technology enables the manufacturer to exclusively deliver 400 and 500 MHz G3 upgrades for NuBus Macs. The Crescendo/NuBus is a universal card that works in the 6100, 7100, and 8100. This version of the Crescendo/NuBus card also supports the 6100 AV allowing you to continue to use the AV card already installed in the computer.??There is a number of Macintosh models that was tested for compatibility with these upgrade cards: Power Macintosh 6100/60, 6100/60 AV, 6100/66, 6100/66 AV, 6150/66, 7100/66, 7100/66 AV, 7100/80, 7100/80 AV, 8100/80, 8100/80 AV, 8100/100, 8100/110, 8115/110.