Apple Silicon M1: Black Magic Fuckery

Re:Apple Silicon M1: Black Magic Fuckery by ytch on Tuesday November 24, 2020 @08:15PM (#25204918)

This reminds me that Xbox series X/PS5 use Unified GDDR for higher memory bandwidth, I'm curious if such design can help x86 catch up M1?

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Re:Apple Silicon M1: Black Magic Fuckery by kllrnohj on Tuesday November 24, 2020 @08:43PM (#25205098)

x86 has been doing unified memory for integrated GPUs since at least 2015. It's not a new thing, see for example https://bit-tech.net/news/tech/cpus/amd-huma-heterogeneous-u...

The reason GDDR isn't typically used for system RAM is it's higher latency & more power hungry. Like, the GDDR6 memory on a typical discreet card uses more power than the an entire M1-powered Mac Mini power hungry.

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Re:Apple Silicon M1: Black Magic Fuckery by ytch on Tuesday November 24, 2020 @08:48PM (#25205121)

Thanks, I haven't noticed the latency/power difference of GDDR memory.

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