3 ms·
It's probably because Toronto, where he lives, has been around 27 degrees and 70% humidity the last few days. That's around 7 degrees and 20% humidity above the
by andromeduck 8y ago
It's probably because Toronto, where he lives, has been around 27 degrees and 70% humidity the last few days. That's around 7 degrees and 20% humidity above the typical office climate of around 20 degrees and 50% humidity. That difference can result in roughly 20% lower dissipation power if the temperature at the heatsink is around 50-60 degrees which it appears to have been historically.
That 20% extra dissipation power might be enough to get it from 2.2 to 3 GHz considering the base clocks are usually where processors have the most efficient marginal frequency scaling.
IMO, designing the thermal solution + chip combination to reach base clocks at typical office climates seems reasonably smart/defensible because most places will be cooler than that most of the year even before AC.
- akmarinov 8y agoHe wasn’t testing it outside in the sun, though …
- raverbashing 8y agoBut if his place has no AC, it's even worse than outside (in the shadow)
- simongr3dal 8y agoWhat’s to say he didn’t perform the benchmarking in a room with AC?
- andromeduck 8y agoI'm guessing here because he appears to be in a house/apartment, didn't show ambient temperatures and because Toronto is surrounded by the great lakes which should make it more temperature than Montreal and Quebec city which recently experienced a spade of heat deaths and heat induced early mortality due to lack of widespread AC adoption.
- Improvotter 8y agoThe i7 was tested in the same circumstances I assume. So it shouldn't matter how hot or humid it was. The comparison should be valid.
- andromeduck 8y agoYeah I'm not sure what's going on there, the cores on the 2017 had to be maintaining a sustained 3.7 GHz clock or 0.6 GHz boost for the highest end option. Might just be silicon lottery, might be the GPU thermals are interfering or maybe the 2018 would run faster with 2 cores disabled.