[keeda]

Just so I understand correctly, you mean that with DWDM 2 strands of cables were equivalent to 8 since DWDM as a multiplexing technology increased the capacity of each fiber, right?

> How much is a 10 year old GPU worth? Where is the “dwdm but for GPUs?”.

From other sources cited in TFA it seems GPUs won't last 3 years, let alone 10! But I think we know what the "DWDM for GPUs" is -- it's the processing efficiency gains that we've seen over the last few years which keeps driving the per-token prices sharply down.

[nickdothutton]

I'm not sure where DWDM is currently, but we quickly went from 1 colour to 512 colours per strand. I expect and hope for increases in GPU performance, some via process shrink, some via wafer size/yield, and some...perhaps... by software efficiencies (most interesting to me). Maybe volumes will increase too, further driving down the price for essentially the same parts. However I don't see how these gains (if they happen) can "get us to 512".