In this video, I upgrade the L3 cache from 1MB to 2MB on a Dual-867 MHz PowerMac G4 MDD CPU card, which I initially upgraded to dual MC7457 CPUs in a previous video. That video can be found here:    • PowerMac G4 MDD MC7457 CPU Upgrade  


After performing the upgrade, I was able to get the 7457 CPUs clocked up to 1.5 GHz. That, plus the extra 1MB of L3 cache per CPU, improved the performance quite considerably.


The information I used for setting the CPU PLL resistors and adjusting CPU VCORE voltage can be found here: https://thehouseofmoth.com/ppc-overcl...


The SPD EEPROM dump I used can be found here: https://68kmla.org/bb/index.php?threa...


Special thanks to Hrutkay Mods for sending me the donor CPU card:    / hrutkaymods