Re:M1 Ultra Geekbench Score
by wmf on Tuesday March 08, 2022 @08:02PM
(#30609710)
The physical distance confers no latency advantage.
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Is this because of signal speed anyway reaching almost speed of light?
Maybe 70% the speed of light. That's a handful of cycles at a few GHz for any SDRAM channel. The latency limitation is caked in to the scanning, strobed nature of SDRAM. It's dense and cheap, but it will never respond faster than ~20 ns (100+ cycles).