PowerPC 7410 - code named "Nitro", a low power version with support for up to 1 MB L2 cache, used in the first Titanium PowerBook G4 models between 400 to 500 MHz.PowerPC 7400 - code named "Max", supports up to 2 MB L2 cache and used in the first "graphite" Power Mac G4 models between 350 to 500 MHz.Though the IBM and Motorola versions use compatible instruction sets, the hardware logic implementations are very different from one another. They were touted by Apple for containing a " Velocity Engine", a 128-bit vector processing unit marketed as AltiVec by Motorola, and Vector Multimedia Extension (VMX) by IBM. G4 processors contained a 32 KB instruction cache, a 32 KB data cache, and varying levels of support for L2 and/or 元 caches.
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