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HPE Labs manufactures monster memory Machine system

Anonymous Coward
Anonymous Coward

... However, the motherboard and CPU die does not have so many pins to deliver all 48 bits of the memory address to the RAM chip through the address bus ...

It is getting pretty close though - according to LGA 2011 datasheet, current generation of E7 Xeons support up to 46 bits of physical address space (which, somewhat unsurprisingly, matches the 64TB Linux limit you mention above). The previous-generation socket (LGA 1366) supported "only" 40 physical address bits, so one should expect that the next Xeon socket update will increase the physical address space again, possibly beyond 48 bits.

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