> If there's an error in e.g. floating-point unit, it would just cause random errors in the output, but the game would probably keep running The processor circ

> If there's an error in e.g. floating-point unit, it would just cause random errors in the output, but the game would probably keep running The processor circuitry does not only consist of transistors dedicated to the datapath, a significant amount of transistors are used to control the datapath. If control transistors are faulty there is no guarantee about the processor behavior. Also, I don't know about Intel cpu protections, but in modern secure hardware we include dedicated circuits for power/clock glitch detection. The glitch detection circuit is designed with a higher sensibility to power/clock fault than the rest of the circuit, this way its avoids that clock/power faults affect the integrity of the circuit output.