On modern chips, we are not only "fusing out" faulty cores. We also put more memory cuts than necessary into the silicon and we fuse out the defective ones to i

On modern chips, we are not only "fusing out" faulty cores. We also put more memory cuts than necessary into the silicon and we fuse out the defective ones to increase the yield. You can look at Memory BISR (built-in-self-repair).