Infinity fabric is a software thing (a way to distribute information over a buss similar to pci-e) where as this is a physical piece of hardware that electrical

Infinity fabric is a software thing (a way to distribute information over a buss similar to pci-e) where as this is a physical piece of hardware that electrically passes the signals between 2 chips. I see no reason why infinity fabric could not be routed through a silicon interconnect, but it would be wasteful. The whole point of silicon interconnects that the hardware protocols like pci-e are no longer necessary and can use much lower power/cheaper ways to transfer data.