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[Guide] Dell XPS 13 9360 on MacOS Sierra 10.12.x - LTS (Long-Term Support) Guide

Joined
Sep 19, 2011
Messages
342
Motherboard
XPS 13 9360
CPU
i7-8550U
Graphics
UHD 620
Mac
MacBook Pro
Did you just transplant a motherboard from a 8550u system? If so, could you pass the part #?
Yes and it's relatively easy to do. The 93x0 motherboards are understandably small and low on external connections, so easy to replace.

The part I ordered with 16GB and an i7-8550U came with 2133MHz of LPDDR3. This is the part code:

MJ08X OEM DELL XPS 13 9360 Motherboard i7-8550U 3.8GHz CPU 16GB RAM LA-D051P

That should set you back around $300-450 excluding relevant taxes. Cheaper if you get lucky or hustled.

Apparently there also are some 2400MHz boards in the wild, but I don't know if they have a different part code.
 
Joined
Jul 3, 2014
Messages
933
Motherboard
Dell XPS 9360 (KabyLake R)
CPU
Intel i7 8550U
Graphics
Intel UHD 620
Mac
MacBook, MacBook Pro
Mobile Phone
Android
@jkbuha, nice upgrade. I'm still waiting on my screen part, so currently not using the XPS 9360.
Hence no updates on my git. I expect it to arrive in the next few days.

Edit: Finally. My XPS 9360 is fixed and operational again. I did look at other laptops in the market before deciding to repair, but no major upgrades since this is already i7-8550u. Only becomes worth looking at a next laptop once 32GB hits 13"/14" inch factor and maybe Ice Lake or beyond CPUs.
 
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Joined
Jul 3, 2014
Messages
933
Motherboard
Dell XPS 9360 (KabyLake R)
CPU
Intel i7 8550U
Graphics
Intel UHD 620
Mac
MacBook, MacBook Pro
Mobile Phone
Android
Has anyone had a problem with the screen's hinge? It became loose last year and I made Dell fix it (well, the 'technician' replaced the whole screen instead of fixing the hinge) and now the problem has recurred, but now the laptop is out of warranty... sigh...

Tips? (slightly off-topic, but oh well)
is a great guide on how to replace your hinges only.
 
Joined
Apr 2, 2013
Messages
399
Motherboard
Dell XPS 13 (9360)
CPU
i7-8550u (8th Generation) Kalby Lake - R
Graphics
Intel UHD 620
Mac
MacBook Pro
VoltageShift

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VoltageShift Info Tool

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CPU voltage offset: -250mv

GPU voltage offset: -250mv

CPU Cache voltage offset: -75mv

System Agency offset: 0mv

Analogy I/O: 0mv

OC mailbox cmd failed

Digital I/O: 0mv

CPU BaseFreq: 2000, CPU MaxFreq(1/2/4): 4000/4000/3700 (mhz)

CPU Freq: 0.6ghz, Voltage: 0.5081v, Power:pkg 1.99w /core 0.16w,Temp: 35 c

Above is the current read of my machine. CPU Cache cannot go lower without a freeze. CPU and GPU voltage certainly seem like they can go lower, but the script doesn't allow me to.

Is it officially determined that the BIOS needs to have overclocking enabled to make these adjustments actually take effect?

It does behaviorally seem like these adjustments are working, since lower CPU Cache values create a freeze of the machine.

Thanks much!
 
Last edited:
Joined
Sep 19, 2011
Messages
342
Motherboard
XPS 13 9360
CPU
i7-8550U
Graphics
UHD 620
Mac
MacBook Pro
-250mV? I can barely get -125mV (on full load).
Have you run all stress tests (Prime95, 3D etc)

Also - are you using active cooling or heatpads?
 
Joined
Apr 2, 2013
Messages
399
Motherboard
Dell XPS 13 (9360)
CPU
i7-8550u (8th Generation) Kalby Lake - R
Graphics
Intel UHD 620
Mac
MacBook Pro
-250mV? I can barely get -125mV (on full load).
Have you run all stress tests (Prime95, 3D etc)

Also - are you using active cooling or heatpads?
Yep, 250mV. I run Geekbench to confirm on MacOS. I did repaste and heatpads.
 
Last edited:
Joined
Jan 2, 2019
Messages
3
Motherboard
Dell XPS 9360 - 2.10.0 - Clover UEFI
CPU
i5-7200U
Graphics
HD 620 3200x1800
Mac
MacBook Pro
Mobile Phone
iOS
My xps 9360 have QHD+ screen, so default video memory is 64MB and I cannot find DVMT on BIOS to set 128MB, please help me!

1) BIOS DVMT pre-alloc patching from 32MB to 128MB (setup_var 0x785 0x04)
2) BIOS DVMT max-alloc patching from 256MB to MAX (setup_var 0x786 0x03)
 
Joined
Jul 3, 2014
Messages
933
Motherboard
Dell XPS 9360 (KabyLake R)
CPU
Intel i7 8550U
Graphics
Intel UHD 620
Mac
MacBook, MacBook Pro
Mobile Phone
Android
Yep, 250mV. I run Geekbench to confirm on MacOS. I did repaste and heatpads.
Without modifying the BIOS variable, I was able to set any value really. So you might want to make sure your EFI unlock flags are set.
 
Joined
Jan 26, 2019
Messages
1
Hi Mark,
Thanks for linking this. I'll give a try with the AppleALC and remove the Voodoo one and look into the sleep specific issues.
Thanks!
I did this as well and everything seems to work well except the headphone jack doesn't seem to produce any sound. When I plug in headphones they are detected but no sound comes out. Are you guys experiencing the same or did I mess up somewhere?
 
Joined
Sep 19, 2011
Messages
342
Motherboard
XPS 13 9360
CPU
i7-8550U
Graphics
UHD 620
Mac
MacBook Pro
Yep, 250mV. I run Geekbench to confirm on MacOS. I did repaste and heatpads.
Did some further research after I thought a bit about this. 250 is the maximum range of the under/over-volt registers, as they're only 8-bit on the Dell. So unless there's a super-resistant die lattice out there, it's likely that you've just not enabled the registers for overclocking (which in turn should enable undervolting).

Also - and more pertinently, there should be higher GB scores with each step you undervolt, as you are further away from the TDP ceiling. What are the GB differences, say at 0, -125, -250?
 
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