4 ms·
If you look at GP's question, (s)he was asking about 5Ghz in Zen2. Since Epyc 1 is ~3Ghz, a 1.6x increase in clock speed for a ~1.4x smaller process size (AFAIK
by m_mueller 8y ago
If you look at GP's question, (s)he was asking about 5Ghz in Zen2. Since Epyc 1 is ~3Ghz, a 1.6x increase in clock speed for a ~1.4x smaller process size (AFAIK "7nm" is overselling it compared to 14nm) to me smells like Dennard scaling and thus cannot be expected anymore (if you disregard tricks like turbo boost where a bunch of hardware gets disabled such that the rest can be boosted).
- Dylan16807 8y agoThey're asking about a 1.25x increase on a 1.4x smaller process. Even if you completely ignore boost clocks, the 1900X has a base clock of 3.8GHz, so interpret it as "4.75GHz base clock on a non-Epyc part" if you must. But I don't think you should ignore boost clocks. They're not a trick to make the silicon seem more capable. The silicon really is that capable and boost clocks are a trick to cap power draw. It's entirely fair to look at the 4.2 boost clock on the 2990WX and conclude that the silicon is capable of 4GHz under non-exotic conditions.