4 ms·
How would you get around speed-of-light delays? The speed of light is about 1 foot/nanosecond, so maintaining a 1-cycle access time @ 3 GHz gives you about 4 i
by nostrademons 7y ago
How would you get around speed-of-light delays? The speed of light is about 1 foot/nanosecond, so maintaining a 1-cycle access time @ 3 GHz gives you about 4 inches to play with. Current server designs have some headroom (100 cycles = 33 feet, while the actual physical distance is more like 1-2 feet), but as soon as you start going to another rack and want to maintain normal RAM access speeds you run up against physical limits pretty quickly.
- LargoLasskhyfv 7y agoI assume you mean the speed of light in copper, or silicon instead of a vacuum? If so, may i warp your assumptions by the suggestion of using silicon photonics, and [1] https://en.wikipedia.org/wiki/Photonic-crystal_fiber https://en.wikipedia.org/wiki/Photonic-crystal_fiber theryby gaining 30% more speed? Some article from 2013: [2] https://www.extremetech.com/extreme/161687-darpa-creates-hollow-core-optical-fiber-for-faster-networks-more-accurate-sensors https://www.extremetech.com/extreme/161687-darpa-creates-hol... Some company from now: [3] https://www.nktphotonics.com/lasers-fibers/product-category/photonic-crystal-fibers/ https://www.nktphotonics.com/lasers-fibers/product-category/...