4 ms·
Insane. I wonder how you would even design a memory subsystem for this. Back of the envelope calculation says you'd need at least a 212500 bit wide DDR5-7200 bu
by rowanG077 4y ago
Insane. I wonder how you would even design a memory subsystem for this. Back of the envelope calculation says you'd need at least a 212500 bit wide DDR5-7200 bus to even approach that throughput.
- wbl 4y agoMy guess is that it gets treated as 55 separate optical channels each with their own receivers and that there is considerable multiplexing on top.
- krisroadruck 4y agoThese things don't go to a single system. The signal is optically split at the ends and there are big racks of transceivers, each transceiver deals with a single mode. With 55 modes you are looking at dealing with 27 terabits or 125 terabytes per second on any given system.
- MayeulC 4y agoI get 28.5 Tib/s, so 3.6 TiB/s, not sure how you went from 27 to 125?
- krisroadruck 4y agoI am also not sure, it's not even a case of multiplied instead of divided. Bizarre.
- nine_k 4y agoI suppose this is not about larger bandwidth from/into one system, but about fewer long cables (say, transoceanic).