You cannot use EDO memory in the Power Macintosh 7200 computer. Using EDO memory in the Power Macintosh 7200 computer can cause damage to the logic board and to the memory. Because of this, Apple does not support using EDO memory in the Power Macintosh 7200 computer. Any damage incurred from using EDO memory in the Power Macintosh 7200 computer may not be covered under Apple Computer's limited hardware warranty.
For more information on using EDO memory (and other types of memory) with other Power Macintosh computers, please see Tech Info Library article 19456: "
Power Macintosh: Using FPM, EDO, SDRAM, & SGRAM"