Clearing up a major misconception about PowerPC

[walsufnir]

Tachikoma said:

WolfpackN64 said:

That's the point of the Cell, it could handle both tasks. In pure CPU performance, the cell outperforms the PS4 CPU. It's the 18 GPU compute cores that make the PS4 so powerfull, ehile the Nvidia GPU included in the PS3 was even for its time, rather weak

But thats a completely unrelated issue,  and doesn't support what youre saying at all,  and cell wasnt designed to be "cpu"  it was designed to be a multitasking processor that combines the two,  so its only natural that it would outperform,  in numbers,  a cpu designed only to do one thing,  but the real kicker is,  as far as x86 instruction sets go,  the ps4 cpu outperforms the cell completely. 

What exactly makes the x86 isa superior to the cell isa? And how can a different isa outperform another cpu, especially in this case?