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nemo

What do we mean by a 1024 bit interface per chip exactly? Trying to understand how we get 720 GB/sec.

jkorn

@nemo there are 1024 bits coming out of each RAM chip (as opposed to, say, 8 per side of the chip, since these are stacked, so pins are on the bottom), and there are 4 stacked RAM chips, giving us 512 bytes out of memory each RAM cycle. The peak BW comes from the number of transfers per clock and the clock speed, similar to the analysis on slide 27.