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Sonnet brings the G3 revolution to previously "upgrade-challenged" Power Macintosh® and Performa® computers that were built with no processor upgrade slot. Through innovative engineering, Sonnet has designed the Crescendo/L2 G3 to be a "plug-and-play" processor upgrade card that installs into the L2 backside cache slot of the computer. The Crescendo/L2 G3 incorporates the revolutionary PowerPC™ G3 processor and ultra, high-speed Level 2 backside cache.