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=== PowerPC Upgrade Path === Apple offered the '''Macintosh Processor Upgrade Card''' for the LC 580: * PowerPC 601 at 50 MHz (Apple) or 100 MHz (third-party) * Installs in LC PDS slot * Enables Mac OS 8.5-9.1 support * Maintains 68040 emulation for older software Additionally, the LC 580 logic board can be replaced with boards from: * Power Macintosh 5200 LC * Power Macintosh 6200 series * Performa 5260, 5300, 6300 series * Power Macintosh 5400, 6400, 5500, 6500 (requires power supply upgrade)
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