content: They're for "big iron" servers, where you need as much RAM stuffed into 1 system (in this case, 24000GB) as possible. Corporations use them for processing enormous databases or something, and you'd be surprised with how many they buy. This is different than a supercomputer, which is essentially a bunch of cheap computers networked together. They aren't as good at processing large, contiguous datasets, as they would need to shuffle all that data around over the network.