XO360不用X86完全是授权问题与性能无关，另外从奔腾PRO开始其实所谓的X86也是披着CISC的皮不过里面是RISC的馅。
XB用的P3虽然L2和赛扬相当，不过它CACHE的way和P3一样，也不能说拖了XB的后腿。
FF神我看好你哦~

[ 本帖最后由 aeondxf 于 2009-9-27 14:11 编辑 ]

其实XO当年研制时是相当科幻的，如：
So they envisioned a multicore microprocessor, one with as many as 16 cores, or miniprocessors, on one chip. They wanted a graphics chip with 60 shaders, or parallel processors for rendering distinct features in a graphic animations.
另外为啥不用INTEL有这个说明：
Microsoft's current vendors, Intel and Nvidia, didn't like the idea that Microsoft would own the IP they created.
For Intel, allowing Microsoft to take the x86 design to another manufacturer was as troubling as signing away the rights to Windows would be to Microsoft.
Nvidia was willing to do the work, but if it had to deviate from its road map for PC graphics chips in order to tailor a chip for a game box, then it wanted to get paid for it.
Microsoft didn't want to pay that high a price. "It wasn't a good deal," says Jen Hsun-Huang, CEO of Nvidia. Microsoft had also been through a painful arbitration on pricing for the original Xbox graphics chips.

16核的CPU和60SU的GPU，PS3还是洗洗睡吧……

16个440的话就是超弱核多核了，估计当时MS应该有什么别的想法。至于60US的GPU也许会像G80那样是标量，毕竟NV50也曾经投标过XO的GPU。

16个440GX，如果再加上VMX的话……POWER PC版的larrabee么？嘎嘎~