Are there any eGPUS (besides Blackmagic) that can power the LG Ultrafine 5K?
 
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Are there any eGPUS (besides Blackmagic) that can power the LG Ultrafine 5K?  

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kallaway1
(@kallaway1)
New Member
Joined: 11 months ago
 

Hey all,

 

I've got a 13" 2019 base Macbook Pro and an LG Ultrafine 5K display (the original one, not the recent refresh). The Macbook is really struggling to power the 5K display, and gets insanely hot after 3-4 minutes of just being connected to it. I understand the Ultrafine 5K requires a Thunderbolt-3 connection in order to push all of its ~14 million pixels, and I know the Blackmagic eGPUs have this. However, they're also disgustingly overpriced for the components ($700 for a Radeon 580 in 2019?). All of the threads I've been able to find on the subject are from 2018. Have there been any cards/enclosures released in 2019 that also have TB3 output? If not, would a Blackmagic eGPU do the trick in driving the display and sparing the laptop from this heat? I'm unsure if Mac OS itself pulls from an eGPU, or if it's an application-to-application basis.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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joevt
(@joevt)
Noble Member
Joined: 3 years ago
 

@kallaway1

No other solutions yet. If you don't have a Blackmagic eGPU then you need a Thunderbolt 3 add-in card.
https://egpu.io/forums/builds/late-2018-mac-mini-wx-910032gbps-tb3-mantiz-venus-thunderbolt-3-monitor-output-macos-10-14-1-itsage/

The Blackmagic might help with the heat. I don't know for sure. In the 2019 13" MacBook Pro, Both the internal display and any display connected to a Thunderbolt port of the MBP are powered by the iGPU. Connecting an LG 5K display tripples the number of displays (from one to three). I don't know how much that increases heat. There's also the heat of the Thunderbolt controller converting DisplayPort signals to Thunderbolt signals. The Blackmagic eGPU should reduce the heat from both of those sources but I don't know by how much.

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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palad20
(@palad20)
Active Member
Joined: 12 months ago
 

I'm running the new LG UltraFine 5K off a Razer Core X with a Radeon VII and a Mac mini 2018.

Connecting the display to the eGPU is a Moshi USB-C to DisplayPort Cable
https://www.moshi.com/en/product/usb-c-to-displayport-cable-5k/white

It works fine (puts out 5k), but I'm not getting the full benefit of the display. Speakers and camera is not working.

Mac Mini (2018), Razer Core X, Radeon VII, LG UltraFine 5K (2 gen)


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@palad20 Good to hear the Moshi cable can power the new LG 5K UltraFine from the eGPU DisplayPort connection.

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 13" MacBook Pro [10th,4C,G] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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Eightarmedpet
(@eightarmedpet)
Noble Member Moderator
Joined: 3 years ago
 

I wish I had the second gen... le sigh. Good to hear it's power able by the Mooshi cable, V1 defo isn't (have tried).

2017 13" MacBook Pro Touch Bar
GTX1060 + AKiTiO Thunder3 + Win10
GTX1070 + Sonnet Breakaway Box + Win10
GTX1070 + Razer Core V1 + Win10
Vega 56 + Razer Core V1 + macOS + Win10
Vega 56 + Mantiz Venus + macOS + W10

---

LG 5K Ultrafine flickering issue fix

 
2017 13" MacBook Pro [7th,2C,U] + RX 5700 XT @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.15.4 & Win10 2004 [build link]  


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joevt
(@joevt)
Noble Member
Joined: 3 years ago
 

@palad20

Can you use SwitchResX to verify that the output timing is 900+ MHz? macOS doesn't actually tell the user what the output signal is anywhere. It's possible that you have a 5K frame buffer but are only outputting a 4K signal (533 MHz).

Also, because DisplayPort 1.4 has only 75% the bandwidth of dual DisplayPort 1.2 (what Thunderbolt connection to LG 5K displays uses), the max color depth is reduced from 10 bpc to 8 bpc.

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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joevt
(@joevt)
Noble Member
Joined: 3 years ago
 

If the Moshi cable works, then maybe the Huawei VR 2 Computer Connection Cable can enable USB functions of the display? The description of the cable says DisplayPort 1.2, but we haven't proven yet that the LG UltraFine 5K gen 2 supports 5K over DisplayPort 1.4, and DisplayPort 1.4 is only 50% faster than DisplayPort 1.2 so the cable might be able to transmit a DisplayPort 1.4 signal. The cable has worked with the LG UltraFine 4K display.

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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palad20
(@palad20)
Active Member
Joined: 12 months ago
 

@joevt

You're right. I´m getting the following in SwitchResX

Mode = 3840 × 2160 @ 59.999Hz
Pixel Clock............. 522.61 MHz

Also:

Input signal & sync:
--------------------
Digital Input
10 Bits per Primary Color
DisplayPort interface

Mac Mini (2018), Razer Core X, Radeon VII, LG UltraFine 5K (2 gen)


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joevt
(@joevt)
Noble Member
Joined: 3 years ago
 

@palad20

I think you're looking at the EDID of the display. Can you post it here? I would like to see if there's any other useful info in there. 522.61 MHz matches CVT-RB v2 timing for 4K.

To see the timing info for the current resolution, double-click the current resolution in the Current Resolutions tab in SwitchResX.

I wonder if you can create a 5K resolution with lower refresh rate such as 30 Hz? SwitchResX lets you create custom timings and scales. Use CVT-RB or CVT-RB v2 timing to create a 5120x2880 30Hz resolution.

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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palad20
(@palad20)
Active Member
Joined: 12 months ago
 
EDID report generated by SwitchResX Version 4.9.0  for display LG UltraFine
 
-----------------------------------------------------
------------------- MAIN EDID BLOCK -----------------
-----------------------------------------------------
 
EDID Version........1.4
Manufacturer........GSM (1E6D)
Product ID..........23412 (5B74)
Serial Number.......
 
Manufactured........Week 6 of year 2019
Max H Size..........60 cm
Max V Size..........34 cm
Gamma...............2.20
 
Display Supported Features:
---------------------------
Power Management: Standby
 
 
Display type:
-------------
RGB 4:4:4 Color Encoding Format
Display is non continuous frequency
Default color space is not sRGB standard
 
 
Input signal & sync:
--------------------
Digital Input
10 Bits per Primary Color
DisplayPort interface
 
 
Color info:
-----------
Red x = 0.680  Green x = 0.265  Blue x = 0.150  White x = 0.312
Red y = 0.320  Green y = 0.690  Blue y = 0.060  White y = 0.329
 
Established Timings:
--------------------
640 × 480  @ 60Hz
 
Manufacturer Reserved Timings:
------------------------------
 
Standard Timing Identification:
-------------------------------
 
Monitor Description blocks:
---------------------------
Descriptor #0 - Timing definition:
Mode = 3840 × 2160 @ 59.999Hz
Pixel Clock............. 522.61 MHz Non-Interlaced
 
                       Horizontal Vertical
Active.................. 3840 pixels 2160 lines
Front Porch.............    8 pixels   1 lines
Sync Width..............   32 pixels   8 lines
Back Porch..............   40 pixels  53 lines
Blanking................   80 pixels  62 lines
Total................... 3920 pixels 2222 lines
Scan Rate............... 133.319 kHz 59.999 Hz
 
Image Size..............  600 mm 340 mm
Border..................    0 pixels   0 lines
 
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
 
Descriptor #1 - Timing definition:
Mode = 2560 × 1440 @ 60.000Hz
Pixel Clock............. 234.59 MHz Non-Interlaced
 
                       Horizontal Vertical
Active.................. 2560 pixels 1440 lines
Front Porch.............    8 pixels   1 lines
Sync Width..............   32 pixels   8 lines
Back Porch..............   40 pixels  32 lines
Blanking................   80 pixels  41 lines
Total................... 2640 pixels 1481 lines
Scan Rate...............  88.860 kHz 60.000 Hz
 
Image Size..............  600 mm 340 mm
Border..................    0 pixels   0 lines
 
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
 
Descriptor #2 - Serial number:
 
 
Descriptor #3 - Monitor name:
LG UltraFine
 
 
-----------------------------------------------------
------------ EXTENSION EDID BLOCK   1 ---------------
-----------------------------------------------------
 
DID-EXT: Display ID Extension:
------------------------------
(only partly interpreted)
DisplayID version........1.2
 
 
 
DisplayID Block Type = Detailed Timing Block type 1:
Detailed Timing #1 in Block
Mode = 3840 × 2160 @ 59.999Hz
Pixel Clock............. 522.61 MHz Non-Interlaced
 
                       Horizontal Vertical
Active.................. 3840 pixels 2160 lines
Front Porch.............    8 pixels   1 lines
Sync Width..............   32 pixels   8 lines
Back Porch..............   40 pixels  53 lines
Blanking................   80 pixels  62 lines
Total................... 3920 pixels 2222 lines
Scan Rate............... 133.319 kHz 59.999 Hz
 
Is default Mode
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
 
Detailed Timing #2 in Block
Mode = 3200 × 1800 @ 59.999Hz
Pixel Clock............. 364.47 MHz Non-Interlaced
 
                       Horizontal Vertical
Active.................. 3200 pixels 1800 lines
Front Porch.............    8 pixels   1 lines
Sync Width..............   32 pixels   8 lines
Back Porch..............   40 pixels  43 lines
Blanking................   80 pixels  52 lines
Total................... 3280 pixels 1852 lines
Scan Rate............... 111.119 kHz 59.999 Hz
 
Is non-default Mode
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
-----------------------------------------------------
------------ EXTENSION EDID BLOCK   2 ---------------
-----------------------------------------------------
 
DID-EXT: Display ID Extension:
------------------------------
(only partly interpreted)
DisplayID version........1.2
 
 
DisplayID Block Type = Detailed Timing Block type 1:
Detailed Timing #1 in Block
Mode = 2560 × 2880 @ 59.996Hz
Pixel Clock............. 483.37 MHz Non-Interlaced
 
                       Horizontal Vertical
Active.................. 2560 pixels 2880 lines
Front Porch.............    8 pixels   1 lines
Sync Width..............   32 pixels   8 lines
Back Porch..............  120 pixels  73 lines
Blanking................  160 pixels  82 lines
Total................... 2720 pixels 2962 lines
Scan Rate............... 177.710 kHz 59.996 Hz
 
Is non-default Mode
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
 
5210x2280 at 30 hz
 
-----------------------------------------------------
------------ EXTENSION EDID BLOCK   3 ---------------
-----------------------------------------------------
 
DID-EXT: Display ID Extension:
------------------------------
(only partly interpreted)
DisplayID version........1.1
 
DisplayID Block Type = Detailed Timing Block type 1:
Detailed Timing #1 in Block
Mode = 5120 × 2880 @ 30.000Hz
Pixel Clock............. 455.68 MHz Non-Interlaced
 
                       Horizontal Vertical
Active.................. 5120 pixels 2880 lines
Front Porch.............    8 pixels  27 lines
Sync Width..............   32 pixels   8 lines
Back Porch..............   40 pixels   6 lines
Blanking................   80 pixels  41 lines
Total................... 5200 pixels 2921 lines
Scan Rate...............  87.631 kHz 30.000 Hz
 
Is non-default Mode
Sync: Digital separate with
* Negative vertical polarity
* Positive horizontal polarity
 
DisplayID Block Type = ASCII String:
SwitchResX
 

Mac Mini (2018), Razer Core X, Radeon VII, LG UltraFine 5K (2 gen)


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