Z's memory subsystem equally impressive. It can detect, correct and survive normal bit errors of course. But then it can detect, correct and survive power r

Z's memory subsystem equally impressive. It can detect, correct and survive normal bit errors of course. But then it can detect, correct and survive power regulator, clock, DRAM, lane, controller and channel failures. RAIM (Redundant Array of Independent Memory) eats up 20% of the memory capacity. If you want Z CPU, then you might want the memory subsystem as well. If you have them, you probably want the redundant IO as well. Then it's easier to buy the whole thing.