Mac Book Pro 2020 16” - Razer Core X - AMD Radeon 5700 XT Issues
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Mac Book Pro 2020 16” - Razer Core X - AMD Radeon 5700 XT Issues  

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Illustrious Member Admin
Joined: 4 years ago

@outer_net, The first generation 5K UltraFine display can only work with a Thunderbolt 3 monitor input. DisplayPort to USB-C connection does not work with it.


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2021 15" ASUS TUF Dash F15 [11th,4C,H] + RTX 3080 @ 32Gbps-TB4 (AORUS Gaming Box) + Win10 2004 // my 3rd RTX 3080 build [build link]  

Active Member
Joined: 7 months ago


So the newer ones work 27MD5KL with the adapting cables but not the one I have?

Think I will have to wait for this

Will those cables work on this screen? or would I be better with DP > DP


Thank you

This post was modified 7 months ago

MBP 16” 5600M | 64GB | 4TB | Razer Core X Chroma | AMD Radeon 5700 XT

Noble Member
Joined: 3 years ago

The LG UltraFine 5K (27MD5KL) can work with USB-C to DisplayPort bidirectional cable but only at 4K. For both the 27MD5KA and 27MD5KL, you need a Thunderbolt 3 add-in card to get 5K.

For any display (including the LG UltraFine display Ergo 32UN880), use DP to DP if it exists. Leave the USB-C port for USB 3.x input if that is an option.


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

Mini i5 liked
Active Member
Joined: 1 year ago

Daft Question - have you got Filevault enabled?  My works Macbook Pro 2019 wouldn't boot correctly with Filevault Enabled and the eGPU plugged in.  If i booted without it plugged in, logged in and then connected it everything was fine.


Macbook Air 2018 8/250 with Razer Core X / Sapphire Pulse RX580 4GB and too many adapters 😀

Mini i5 liked
Reputable Member
Joined: 3 years ago

Same here, I have filevault enabled and I have to hotplug my Radeon Vii/Core v2 after signing in, or the boot process hangs before the progress bar shows up.

2019 16 Macbook Pro + Core v2 + Radeon VII MacOS 10.15.1
Core X Chroma + RTX 2080 Windows 10 1909
Asrock X570 Phantom Gaming ITX/TB3, Ryzen 5 3400G + Core v2 + Radeon VII Win10 1909

2020 13" Razer Blade Stealth (GTX1650Ti) [11th,4C,G] + RTX 2080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 20H2 [build link]  

Mini i5 liked
Active Member
Joined: 8 months ago



I have a 16" MacBook Pro / 5300M with a Sapphire 5700 XT Nitro+ and after the login screen, I get no progress bar. I can boot the machine and then hotplug, but you can't boot the machine with it plugged in.



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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