4 ms·

so a 100 GHz CPU could be not so far away

• thechao 3y ago
  A 100Ghz CPU would be limited by other factors; mostly c.
  • jacquesm 3y ago
    That's true, but superconduction would change things from being planar to being cubic and that alone would give a huge boost to speed. Because one main limitation is to be able to get rid of the heat and building 'up' makes that very hard right now.
• js8 3y ago
  AFAIK CPU speeds are mainly limited by speed of light already today. There is tradeoff between time to fetch data from L1 cache (or register file), and their size. If you want to fetch the data faster, the cache has to be smaller (or the pipeline will stall), because the signal won't propagate fast enough to the cache. But smaller L1 cache also has negative performance impact, because more data has to be refetched from deeper caches.