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Were there any 3-core processors which were not de-rated 4-core processors?


Apple's A8X is one. Here's the die shot from AnandTech/Chipworks: https://images.anandtech.com/doci/8716/A8X%20draft%20floorpl...


The Xbox 360 comes to mind.


PS3 had a 9-core (3*3).


The PS3 had a PowerPC main core cpu and a 8 core cell chip. Of the 8 SPU cores, only 6 were available to developers as one was reserved for OS functions and the other, ironically enough, was held back for yield purposes.




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