the g4's architecture is more advanced then the G3 which allows it to access all of its power more evenly allowing programs to open and run quicker than a g3 and makes multitasking run more smoothly.
the pentium 4 is designed more for mhz and not for actual bandwidth and distribution. the pentium4s have more mhz then g3,4,5's but PCs are not designed well enough to actually use these mhz. the G's use all that they are capable of
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