4 ms·

Here's a review from a dev who works at NASA: http://hrtapps.com/blogs/20180712/ http://hrtapps.com/blogs/20180712/ Maybe the key point is he isn't running Ad

Here's a review from a dev who works at NASA: http://hrtapps.com/blogs/20180712/ http://hrtapps.com/blogs/20180712/ Maybe the key point is he isn't running Adobe Premiere. The thermal issues in modern laptops certainly concern me, but they've been running hot for a long time now, and being thin doesn't actually change the surface area significantly.

cozzyd 8y ago
Well the single-core test is unlikely to max out the thermal loading on the CPU. You can see how the scaling from 4-6 cores provides severely diminishing returns, perhaps due to throttling.
- StillBored 8y ago
  Uh, it turbos in the 4+Ghz range. That is by itself probably going to blow the 45W thermal rating the entire chip has. My gut instinct says that macbook probably can't even dissipate that over a long period of time. The linked test seems to indicate the truth of that, and its not unusual for a mac product, the last one that could probably continuously dissipate the combined cpu+gpu heat was that crazy ugly mac pro. Intel didn't invent some new physics to get "high" performance cores crammed into a laptop, they are just pulling the same stuff the phone market has been doing for the past few years. Put enough thermal capacitance against the chip itself to absorb a few multiples of the chips dissipation, allow it to get really hot, and then throttle it hard. Hope, people keep their benchmark runs short. There is a difference between socket 2011/2270 based i7/i9s and their insufficiently cooled, memory and IO bandwidth starved cousins found in laptops. Even a fairly low end desktop is going to stomp the most expensive laptop you can find simply due to physics. Being able to dissipate more heat means higher performance. Its possible to move the curve up/down depending on fab processes, or micro-arch, but these days there aren't any miracle cures. More power equals more performance.
  - n1000 8y ago
    Isn't the 4 GHz meant as a boost frequency as thermals allow? The more CPUs are active the rarer this happens. It becomes problematic when the CPU can't maintain its base clock speed anymore.
bluedino 8y ago
Look at how fast the curves on the 2018 flatten out after 3 or 4 cores.
n1000 8y ago
Yes, I also think we need to see more tests with other apps than Adobe Premiere. Does Premiere use the GPU as well? The thermal system of the MBP needs to handle the combined thermal load of GPU an CPU.
pier25 8y ago
> being thin doesn't actually change the surface area significantly No, but it reduces the space for a better cooling system (pipes, fans, etc).

cozzyd 8y ago

Well the single-core test is unlikely to max out the thermal loading on the CPU. You can see how the scaling from 4-6 cores provides severely diminishing returns, perhaps due to throttling.

StillBored 8y ago
Uh, it turbos in the 4+Ghz range. That is by itself probably going to blow the 45W thermal rating the entire chip has. My gut instinct says that macbook probably can't even dissipate that over a long period of time. The linked test seems to indicate the truth of that, and its not unusual for a mac product, the last one that could probably continuously dissipate the combined cpu+gpu heat was that crazy ugly mac pro. Intel didn't invent some new physics to get "high" performance cores crammed into a laptop, they are just pulling the same stuff the phone market has been doing for the past few years. Put enough thermal capacitance against the chip itself to absorb a few multiples of the chips dissipation, allow it to get really hot, and then throttle it hard. Hope, people keep their benchmark runs short. There is a difference between socket 2011/2270 based i7/i9s and their insufficiently cooled, memory and IO bandwidth starved cousins found in laptops. Even a fairly low end desktop is going to stomp the most expensive laptop you can find simply due to physics. Being able to dissipate more heat means higher performance. Its possible to move the curve up/down depending on fab processes, or micro-arch, but these days there aren't any miracle cures. More power equals more performance.
- n1000 8y ago
  Isn't the 4 GHz meant as a boost frequency as thermals allow? The more CPUs are active the rarer this happens. It becomes problematic when the CPU can't maintain its base clock speed anymore.

bluedino 8y ago

Look at how fast the curves on the 2018 flatten out after 3 or 4 cores.

n1000 8y ago

Yes, I also think we need to see more tests with other apps than Adobe Premiere. Does Premiere use the GPU as well? The thermal system of the MBP needs to handle the combined thermal load of GPU an CPU.

pier25 8y ago

> being thin doesn't actually change the surface area significantly No, but it reduces the space for a better cooling system (pipes, fans, etc).