By: James (no.delete@this.thanks.invalid), April 24, 2013 9:39 am
Room: Moderated Discussions
Ungo (a.delete@this.b.c.d.e) on April 23, 2013 12:33 pm wrote:
> SNB/IVB ultrabooks and other slim/light designs depend on permitting the delta-T between
> silicon and ambient air to grow as high as it can without exceeding Tjmax. I expect to see
> Haswell systems doing exactly the same. Nobody would be very happy with Haswell portables
> needing a significantly larger and/or noisier thermal system to keep GT3e eDRAM cool.
Alpha replied:
> GT3e isn't going into ultrabooks anyway, so i don't think this is an issue.
Surely it's an issue whenever you're on battery, though? The hotter the CPU can get, the higher the temperature gradients between the CPU and the outside world are, which helps the heat escape, so the fan doesn't have to be as powerful.
> SNB/IVB ultrabooks and other slim/light designs depend on permitting the delta-T between
> silicon and ambient air to grow as high as it can without exceeding Tjmax. I expect to see
> Haswell systems doing exactly the same. Nobody would be very happy with Haswell portables
> needing a significantly larger and/or noisier thermal system to keep GT3e eDRAM cool.
Alpha replied:
> GT3e isn't going into ultrabooks anyway, so i don't think this is an issue.
Surely it's an issue whenever you're on battery, though? The hotter the CPU can get, the higher the temperature gradients between the CPU and the outside world are, which helps the heat escape, so the fan doesn't have to be as powerful.