> Having worked for Intel in the way back.  There was another reason for
> putting out 486SX's, increased yield.   If there was an error encountered
> during post production testing in the FP unit, disable it, voila 486SX and
> sell it.
it is normal practice in chip producers and i don't see anything bad in
it. the same was with motorola EC or LC versions, the same is with CPU
clocks - for example intel does not make lots on pentium III versions, but
after testing qualifies them according to maximum clock rate on which in
runs without errors.