Checked my website, and here is what it says:
Yes. 4 upgrade chips were made for the 500 series PowerBooks. Newer Technologies made 3 upgrade chips for the 500 series PowerBooks (1) NUpowr 183mhz PowerPC® chip with 128K of L2 cache (Price: NA. Availability: NA) (2) NUpowr 167 PowerPC® 603e chip (Cache: NA. Price: $935. Availability: NA). (3) NUpowr 117 PowerPC® 603e chip. Apple Computers® made 1 upgrade chip that ran at 100mhz (603e PowerPC®) - cache: NA. Price: NA. Availability: NA. Try OUTPUT ENABLERS to obtain a chip booster ($45; might increase your chip speed to 76 MHz).
http://thisoldmac.ca/specs/PB540.html
Yes. 4 upgrade chips were made for the 500 series PowerBooks. Newer Technologies made 3 upgrade chips for the 500 series PowerBooks (1) NUpowr 183mhz PowerPC® chip with 128K of L2 cache (Price: NA. Availability: NA) (2) NUpowr 167 PowerPC® 603e chip (Cache: NA. Price: $935. Availability: NA). (3) NUpowr 117 PowerPC® 603e chip. Apple Computers® made 1 upgrade chip that ran at 100mhz (603e PowerPC®) - cache: NA. Price: NA. Availability: NA. Try OUTPUT ENABLERS to obtain a chip booster ($45; might increase your chip speed to 76 MHz).
http://thisoldmac.ca/specs/PB540.html