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PREFACE

 

I’ve used a 2015 15” MBP as my main system since it was released. I do photo and video editing in the Adobe suite regularly and have been eyeballing the performance of the latest MBP models. I’m on the road all the time, so a laptop is basically my only option.

After the whole mess with the CPU VRM hardware flaws being made apparent by the poor power management profile shipped at release with the 2018 i9 MBP I’ve been more weary of the hardware design of MacBooks. That’s before I account for losing all USB-A ports, losing the SD card slot (), losing reliability and tactility of the keyboard, and losing the ESC key to the touchbar; if I compare the 2018 MBP to my current 2015.

 

Given these flaws, I have been researching the performance situation comparing the 2018 MBP to the X1 Extreme, XPS 15 9570, and the Razer Blade 15 2018.  These are essentially the only options for a road warrior that needs a high quality panel and the best CPU and GPU that can be crammed into around 4lbs (1.8kg).

 

I used to use a ThinkPad T42p and loved it when it was new. So fast forward to now and the release of the ThinkPad X1 Extreme. It’s a truly tempting machine for an artist, given that the 4K UHD version offers just about the best color gamut available on any laptop panel. I get back the USB-A ports, get one of the fastest SD slots on any laptop, and get one of the best laptop keyboards on the market. That’s before even considering power management and modularity. I’ve been dabbling in learning Machine Learning, so a system with an nVidia GPU (CUDA) is a bonus on that front as well.

 

For me the best color reproduction on a high resolution display panel was most important. The X1 Extreme has that, so I’ve ordered one. I got it with the fastest i7, base SSD and memory, and have separately purchased two 1TB Samsung 970 Pro M.2 SSDs and 2x16GB DDR4-3200MHz memory (just in case it’s possible to overclock the memory on the X1 Extreme). I got the system for $2,100 from Lenovo USA, and the SSDs ($390 x 2) and memory ($330) from Amazon US for a total of ~$3200.  These are easy to install on the X1 Extreme as the bottom cover is easily removed to reveal the M.2 and SODIMM slots. To compare, the 2018 MBP with the fastest i7, 32GB memory, and 2TB SSD is $4400. So I can save $1200 and get a faster system (on all counts) with a better panel and better connectivity by going with the X1 Extreme.

 

The only thing I’m compromising is losing the big beautiful haptic touchpad and a bit more refined hardware aesthetic. Though, to be honest, I’ve kept a big thick dual-layer Tech21 case on my 2015 MBP. So I’ll actually be going down in volume and weight by moving to the more rugged ThinkPad. I think I can live without the touchpad.

Oh, by the way, the 4K UHD panel of the X1 Extreme has touch and decent pen support! Another bonus vs. the MacBook. Though I keep a 12.9” iPad Pro around for my pen work and can’t imagine using a laptop similarly. It’s still nice to have a laptop screen actually respond when I go poke at it accidentally after switching back and forth between laptop and iPad.

 

 

TOPIC

 

 

So I want macOS with proper discrete GPU support on a 2018 MacBook class laptop.  That’s not possible on a pure Hackintosh as things stand, but via a macOS virtual machine it looks like it could work with what looks like some relatively bleeding edge support of PCIe UEFI passthrough.


People have been doing this on Linux hosts to Windows VMs with some great success recently: https://gist.github.com/Misairu-G/616f7b2756c488148b7309addc940b28

And it looks like that’s coming for macOS VMs as well: https://github.com/kholia/OSX-KVM/blob/a4fb2fd5aae871bdbc371b0cd31d4d8129d0f9ac/UEFI/README.md

The X1 Extreme, XPS 15 9570, and Razer Blade 15 (2018) are essentially direct competition to the 2018 15” MBP. I would really like to see these three systems get some nicely fleshed out guides for getting maxed out compatibility and performance in macOS running in a VM for these systems. When I get my X1 Extreme I’ll start working on it for that one. I will post updates here. I hope to inspire others with the other two systems (or looking to get them) to do similarly.

 

 

15” MACBOOK CLASS LAPTOP COMPARISON

 

I chose the X1 Extreme largely because of the excellent 4K UHD HDR panel (100% of 2D AdobeRGB and 85.5% of 3D AdobeRGB, basically unparalleled), good mix of thermal performance and noise management, and overall ruggedness and connectivity.  If I were a gamer I would go with the Razer 15, but the fast low-gamut 1080p panel just doesn’t work for my purposes. If I were most concerned with aesthetics or battery life (97Wh battery for it vs 80Wh for X1E) I would go with the XPS 15.

 

I am aware that the second 2018 refresh of the MBP is coming ~Nov 14, with the new AMD Radeon Pro Vega 16 and Vega 20 GPUs, and it looks like the latter might offer up to a 60% performance boost over the Radeon 560X. Maybe it has even given Apple enough time to update the CPU VRM along the way. This could make the performance picture more comparable for the 1050 Ti based X1E and XPS 15. I believe the 1070 Ti based Razer 15 will still win out though.

 

Still, if you compare the fan and heat pipe solution put into the X1E vs the MBP the MBP just looks wimpy in comparison. MBP has smaller fans, less venting, and only one (smaller, thinner) heatpipe. It’s also more difficult to access if you want to put a better thermal paste or liquid metal on it.  Put simply, the thermal hardware on the MBP is basically the same design for the last 3 years and it can’t keep up with the hex-core processors. So even with the Volta 20 GPU making the MBP competitive again on the graphics end, the MBP will still be falling short on the CPU performance plane. This is before we even look at tuning options.

 

Getting into tuning, it’s possible to improve thermal performance of all the laptops in this class by around 15-20% by using either a best in class thermal paste like Thermal Grizzly Kryonaut or (if you’re willing to deal with all the caveats that come with using a conductive fluid that permeates other metals) a liquid metal interface like Thermal Grizzly Conductonaut. The liquid metal gives you the best possible conducting interface, and the paste is more forgiving and easier to apply.  Further, it is often possible to stably undervolt the Coffee Lake i7/i9 available in this class of systems to further improve performance, thermals, and power consumption (generally another 10+%).

 

Apple has deliberately made it impossible to undervolt the CPU on the MBP! This has been true since the first Skylake CPUs a few years ago. You used to be able to use a program called Volta to undervolt your CPU on macOS. This is a huge peeve for me and, combined with the general power and thermal underdevelopment, is one of the main reasons I want to get a competitor’s hardware. As a primer, the default voltage of modern CPUs is typically set conservatively high for the sake of production efficiency.  With the current generation Coffee Lake CPUs it is commonly possible to set the CPU voltage about 100 to 150mv lower safely.  This allows the CPU to run cooler and consume less power. For laptops which are thermally limited (basically everything in this new 6-core 14nm era), this also translates into better performance. It’s a tweak that actually improves reliability of your CPU. So it’s just stupid that Apple has deliberately made this impossible. Shame on them, someone else take my money.

 

Wrapping up, my biggest quibbles with the X1E (before actually getting it) are that the 4K panel’s responsiveness is about the slowest I’ve seen on a modern panel, and it’s just really not suitable for gaming. There’s also what I consider an annoyingly high level of backlight corner bleed that I’m sure will be distracting during blackboxed video viewing. Hopefully these two issues will be fixed in next year’s iteration.

 

 

FOOTNOTES

 

MacBook i9 Thermal / VRM (below-baseline throttling/thrashing) Issue:

https://www.macrumors.com/2018/07/24/throttling-i9-macbook-pro-power-delivery-chip/

https://www.kitguru.net/lifestyle/mobile/apple/matthew-wilson/macbook-pro-2018-throttling-fix/

This was mitigated with software that works around the poor hardware design, but the system would still ultimately perform better if the CPU VRM were redesigned. Non Mac systems with the similar CPUs don’t have this issue and get better sustained performance.

 

MacBook Nov 2018 Refresh with Radeon Vega 16 and Vega 20:
https://www.fool.com/investing/2018/11/05/apples-macbook-pro-gets-the-amd-vega-treatment.aspx

 

MacBook Class Laptop Reviews:
Lenovo ThinkPad X1 Extreme, 4K: https://www.notebookcheck.net/Lenovo-ThinkPad-X1-Extreme-i7-4K-HDR-GTX-1050-Ti-Max-Q-Laptop-Review.335608.0.html

https://www.ultrabookreview.com/23223-lenovo-x1-extreme-review/

https://youtu.be/vOPeXe1ZE74

https://youtu.be/JgWyGKf_WlM

Dell XPS 15 9570, 4K: https://www.notebookcheck.net/Dell-XPS-15-9570-i7-UHD-GTX-1050-Ti-Max-Q-Laptop-Review.332758.0.html

Razer Blade 15 2018, 1070 Ti FHD 144Hz: https://www.notebookcheck.net/Razer-Blade-15-i7-8750H-GTX-1070-Max-Q-FHD-Laptop-Review.305426.0.html

 

Best Undervolting Guide (keywords: ThrottleStop, Intel XTU):

https://www.ultrabookreview.com/10167-laptop-undervolting-overcloking/

 

Undervolting Coffee Lake i7/i9 (2018 MacBook class CPU):

https://youtu.be/nobnPDtMs-E

https://linustechtips.com/main/topic/923876-any-information-about-how-coffee-lake-h-series-undervolts/

 

Replacing Thermal Paste with Liquid Metal on 2018 MBP:

https://youtu.be/iw4gqfrBN4c ... and follow up: https://youtu.be/JNoZNzOQpVw

 

Replacing Thermal Paste with Kryonaut on X1E:

https://www.reddit.com/r/thinkpad/comments/9fyww7/x1_extreme_repaste_undervolt_tdp_limiter_removed/

 

Replacing Thermal Paste and Undervolting X1 Carbon:

https://youtu.be/FXR5-HwIre8

 

Replacing Thermal Paste and Undervolting XPS 15 9570:

https://youtu.be/ZnFdNGUETSI

 

Possibly over-conservative BIOS update for thermal throttling on X1E:

https://www.reddit.com/r/thinkpad/comments/9oqax2/xtu_results_with_x1_extreme_with_liquid_metal/

 

High Sierra (10.13) drivers only for now:
https://www.insanelymac.com/forum/topic/324195-nvidia-web-driver-updates-for-macos-high-sierra-update-11032018/
nVidia “waiting for Apple’s approval” for Mojave (10.14) macOS driver web release:

https://www.macrumors.com/2018/11/01/nvidia-comment-on-macos-mojave-drivers/


Breadcrumb Links (other things I found researching this):

https://forums.servethehome.com/index.php?threads/esxi-6-5-osx-with-gpu-passthrough.12680/

https://arstechnica.com/civis/viewtopic.php?f=19&t=1432071

 

https://www.notebookcheck.net/The-Best-Notebook-Displays-As-Reviewed-By-Notebookcheck.120541.0.html

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