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A comment on JEDEC Publishes GDDR7 Graphics Memory Standard. Parent comment

Re:JEDEC Publishes GDDR7 Graphics Memory Standard by colechristensen on Tuesday March 05, 2024 @04:50PM (#39609563)
>the speed of light isn't changing

Oh but the speed of the signal does depend quite a lot on the transmission medium. In Cat-6 signals travel 2/3c. Can't find a quick reference for on-die or motherboard kinds of interconnects. If you had optical interconnects traveling through vacuum in a silicon chip, that's a full 50% faster (as in lower travel time for one bit over a distance) than Most copper ethernet.

https://en.wikipedia.org/wiki/Velocity_factor

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Re:JEDEC Publishes GDDR7 Graphics Memory Standard by lloeki on Wednesday March 06, 2024 @03:55AM (#39613806)
> Oh but the speed of the signal does depend quite a lot on the transmission medium

And this (actually, phase velocity) is what makes refraction a thing.

I knew that we could slow down light to subsonic speeds, but TIL we can put it at a complete standstill! Amazing.

https://en.wikipedia.org/wiki/Speed_of_light#In_a_medium

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