Power Mac G4 MDD Dual 1.25Ghz Processor $50.00 Daughterboard Sold out for now Add to Quote Continue Shopping Categories: Cards - Boards - Power Supplies (G3 to G5), G4 Tag: processor Description Apple 661-2707, 820-1452. Dual 1.25Ghz Processor for the Power Mac G4 Mirrored Drive Doors. 2MB Level 3 cache per processor, 1.67Mhz System Bus. This was the 2002 model without firewire 800. M8570, EMC 1914, Powermac3,6.