The required Bit Error Rate (BER) of Intel® QuickPath Interconnect (QPI) is 1 error in 10E14 bits. The BER threshold of PCI Express is 1 error in 10E12 bits. What might account for the two orders of magnitude difference?
Until recently, the bandwagon for in-system and in-line programming of flash memories was gathering momentum, but then it suddenly slowed, a victim of the growing capacity of memory devices and more data to program. Unfortunately, while this was happening, the old legacy programming methods in manufacturing weren’t keeping pace with new innovations. Consequently, the time it took to program memory in-system (with the devices soldered to a circuit board) steadily grew until its place on the manufacturing line was threatened. Manufacturing’s beat rate couldn’t be sacrificed for in-system programming (ISP), could it?