如果你仅仅参照微处理器芯片的时钟速度，你可能会这么想。
If you looked only at the clock speeds of microprocessor chips, you might well think so.
这些小型内存芯片叫快取内存，能让微处理器达到最快速度。
This smaller memory is called cache RAM and allows the microprocessor to execute at full speed.
把奔腾4快取芯片放在微处理器里，它会自主提高内存速度。
Putting the cache right on the microprocessor itself removes the slowdown of the wires between chips.
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