cost per node kinda varies. so far I *think* 28nm was the best cost per transistor; 14nm went up, but prices always drop over time
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Replying to @FioraAeterna @Pinboard
here's a chart from 2014ishpic.twitter.com/jCNpAM6UDX
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Replying to @FioraAeterna
thank you! Yeah, the cost I have in mind is the cost of going from research to a factory making chips with the new process
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Replying to @Pinboard
those went up mainly because multi-patterning means you need a lot more masks. I think they estimate ~80 masks per chip at 7nm
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Replying to @FioraAeterna
I’m curious if there will be a situation where it’s physically possible to do another node, but economically unappetizing
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Replying to @Pinboard
it kinda already happened to a degree with GPUs; desktop GPUs moved to 14nm very late in large part because their dies are so big
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Replying to @FioraAeterna @Pinboard
whereas mobile *really really needs* the low power, so it moved to 14nm as soon as possible, since it was more valuable there
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Replying to @FioraAeterna @Pinboard
sorta tangential, but one thing that bugs me is how people were misled by moore's law in the 90spic.twitter.com/7ojyjUIAg8
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Replying to @FioraAeterna
why does it bug you? It was a golden time for us when we could look at clock speed and know that solitaire would run faster
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Replying to @Pinboard
it bugs me because people assume "moore's law gave us tons more perf!" but it was really "burning tons of power gave us perf"
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I guess power wasn’t an issue for the average joe back when computers were appliances. We grumbled about fan noise is all
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Replying to @Pinboard
yeah, plus there was a lot of upwards room that hadn't been used yet. but then hit 100W and realized they couldn't keep doing this
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Replying to @FioraAeterna
I want to live in a world where you can use a pair of iPhones to grill panini
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