Apple's updated Mac Pro uses a special version of Intel's Xeon workstation-class processor, the semiconductor company said in an e-mail note. The 3GHz quad-core CPU at the heart of the fastest system is currently an unannounced model that sits at the top of the company's performance range and is presently used only by Apple.
"We are indeed shipping a 3.0GHz Xeon version [and] expect to see faster gigahertz speeds for our high-end [Core 2] Extreme PCs very soon, too," said Intel's Bill Kircos. "For now, the product is in limited production and Apple has chosen to adopt it. We will introduce another 3.0GHz Xeon SKU later on as well."The model in question is the
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