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Re:CPU reliability – Linus Torvalds (2007) by zhemao on Sunday December 08, 2013 @10:09PM (#6872669)
Oh whoops, I guess my VLSI professor lied to me. Maybe it only happens with certain multiprocessors. But yeah, there are definitely disabled cores in a lot of processors for the reasons you mentioned.
Re:CPU reliability – Linus Torvalds (2007) by cantfindmypass on Monday December 09, 2013 @02:38AM (#6873236)
ISTR the PS3's Cell processor had eight physical cores to increase yeild.
Re:CPU reliability – Linus Torvalds (2007) by zhemao on Thursday December 12, 2013 @11:17AM (#6895201)
You're mostly right

https://en.wikipedia.org/wiki/PlayStation_3#Technical_specif...

The cell processor had a main PowerPC core and eight floating-point SIMD co-processors called synergistic processing elements (SPE). For the PS3, one of the eight SPEs was disabled and another was reserved for the operating system, leaving the other six for developers.