Thanks. It looks like I was wrong. I understood that there was some redundancy build into chips, but that appears to be false. After some more research I think you are right that only the voltage/clock rating vary die to die, and that the transistors must be 100% working.

That means that the answer to the OP's question should be that if the data is stored in the same memory location then two chips in adjacent server racks will use the same transistors to do the same math.