The demand for perfection is mildly ameliorated by having a few redundant circuits and microcode and then a software layer that can detect and workaround defect

The demand for perfection is mildly ameliorated by having a few redundant circuits and microcode and then a software layer that can detect and workaround defects. If your GPU loses one if its 1000 integer math units, it doesn’t die, it just slows down for an operation that might otherwise use that one.