2) Previous posters who mentioned that some of us reviewers (including me 😉) have given a variety of very thin and light Coffee Lake laptops a hard time for CPU core temps are right. Hello, XPS 15 and those ever-toasty VRMs.
3) I personally own the 2.6GHz Core i7 2018 15" model, and CPU core temps are typically 45-50C unplugged with light to moderate load. During the workday, I use it plugged in to a 4K LG monitor (with the Mac's panel active as a second display at default scaled resolution) and use the hell out of it with Photoshop, Final Cut, Dreamweaver, Office, and a variety of other programs running throughout the day. That 4K monitor forces the AMD GPU to remain active and is a great way to increase heat levels. The Mac typically runs at 62-65C with light use. It will hit 70s to 80's with heavier use. Final Cut exports will bring the core temps to the upper 80s and sometimes low 90s. That's in line with the direct Windows competition in terms of temps (substitute Premiere Pro under Windows). Dell XPS 15, 15" Razer Blade and even the larger Alienware 15 R4... you get the idea. I've always run my Mac 12 hours per day... we'll see how this one holds up.
Like others have said - love your reviews...
I guess I have one comment to say on the quoted parts above... I tried the 15" 2018 MBP (two different machines) and just couldn't deal with the heat coming from them. Even in what seems like rather mundane tasks such as watching Twitch videos, my temps on the MBP would shoot up into the upper 70's. (yes I know Twitch is horribly optimized) Whenever I do anything extremely intensive my temps would almost immediately jump up to the 90's - even touching 100C during the initial Turbo boost before wattage and therefore the frequency dropped after 5 seconds or so.
I actually returned it and went with the XPS 15 (yes the one on the same design for three years). Why? Because it manages heat better in the use cases I had. I had the MBP and the new XPS at the same time to compare and the XPS was constantly at lower temps doing the same tasks (this is out of the box).
Also - I am in IT myself and enjoy techy stuff. I like the fact that I can undervolt, and I can repaste it without having to take apart a good chunk of the laptops internals.
The results after undervolting and repasting? I sit in the low 30's at idle. Low to mid 40's while watching streams on Twitch. During extensive tasks or benchmarks, I get a very slow creep up to about 85C while the CPU maintains it's full Turbo clock speed before eventually dropping the power from about 70W to 55W. Even while it sits at 55W, it can still maintain about 3.7-3.8GHz. My MBP? Lucky to stay around 3.0GHz at 95C plus (on the same 2.2GHz processor). At the same temps (well even lower), the frequencies seem to stay a lot higher on the XPS 15 than the MBP.
Yes the XPS also has thermal issues (VRMs as you menionted). But they aren't as bad out of the box (in my case - maybe I lucked out), and can be managed more easily than Apple's locked down processor and more difficult internal design.
Now I still miss OSX... I literally went through a couple of hours to turn my desktop PC into a dual boot Hackintosh just so I don't lose that experience, ha.
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It may be unfair, but I truly do believe laziness and profits are one reason why we're seeing what we're seeing. Lets take Dell, because I think the thermal issues are perfectly encapsulated with Dell.
Their XPS 15 has had throttling issues with this design for the past couple of years. Granted much of the throttling occurred when people were gaming, business tasks, like excel or what not didn't have this problem. Put in a 6 core Coffee Lake process and a 1050Ti GPU and boom, the thing has thermal issues. Its not like Dell was unaware of this, but the cost of redesigning, and retooling can be significant, so they opted to not doing anything and use the same inferior enclosure with a chipset combination they knew would run hotter then the prior generation.
But - the XPS is much more managable if you are technical at all. Undervolts actually work. Custom Speedshift values, Turbo frequencies, power profiles in Throttlestop. Repasting is much easier.
Yes this is all stuff we consumers shouldn't have to deal with. But for those of us that want to get the most out of our machine, it is much easier with a XPS 15 than a much more locked down MBP.
Still - no excuse for Dell. Just right now their machine gives me more processing power at lower temps and a much lower cost.
But for those tied to the Apple ecosystem, I 100% get it. I was there. I slowly have left which made it easier to leave the OSX ecosystem for my portable workstation.