Processor Upgrades are the fastest way to provide a substantial performance boost and give your old computers a new lease of life. The main benefit of a processor upgrade is that in less than 5 minutes the performance of the PC can be boosted by over 200%. Network and other settings are undisturbed and you can get back to work without any disruption. Upgrade your computer by replacing an existing processor with a new fast processor that provides the best performance.??Peripheral offers this processor upgrade for Apple Macintosh LC 475, Apple Macintosh LC 575, Apple Macintosh LC 580, Apple Macintosh LC 630, Apple Macintosh LC 630 DOS Compatible, Apple Performa 475, 476, Apple Performa 575, 577, 578, Apple Performa 580CD, Apple Performa 630/630CD, 635CD, 636/636CD, 637CD, 638CD, Apple Performa 631CD, Apple Performa 640CD DOS Compatible, Apple Macintosh Quadra 605, Apple Macintosh Quadra 650.