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Or it might just be that when multiple cores are in use, thermal considerations require throttling back from full performance?
by timthorn 11y ago
Or it might just be that when multiple cores are in use, thermal considerations require throttling back from full performance?
- cm2187 11y agoThat wouldn't explain the jump in performance between generations of processors.
- wtallis 11y agoThe change from 22nm to 14nm would.
- cm2187 11y agoSmaller lithography means less heat dissipation, but the frequency hasn't gone up, the processors executes the same number of instructions per second, doesn't it?
- creshal 11y agoRecent Intel CPUs with Turbo Boost have a frequency range they can operate on, with a spread of over one GHz for some models. Thermal limits dictate how much of this buffer the CPU is able to use, so better thermals do lead to higher frequencies used.
- cm2187 11y agoI am a bit outside of my area of confidence but isn't the turbo frequency the max frequency advertised by intel on the CPU? There is not a ratio of 2.5 between these two models so it can only explain a fraction of the delta.
- gruturo 11y agoTrue, but less heat dissipation means less need for thermal throttling. Even when working on a single thread, thermal throttling is likely to kick in - so yep, a die shrink effectively results in higher performance in such a case.
- pkolaczk 11y agoSkylake can also do slightly more instructions per clock, so it is faster even at the same frequency as older generations.