Mac Mini 2018 + Razer X + Vega 64 + LG Ultrafine 5K in Final cut pro
 
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Mac Mini 2018 + Razer X + Vega 64 + LG Ultrafine 5K in Final cut pro  

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(@massimo_franzese)
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Joined: 4 months ago
 

I have the set up described the LG monitor has only a thunderbolt port so the internal GPU is used for real time tasks. When I play my source files in Final Cut Pro X (4K 400 mbps AVC Ultra) it stutters. This problem does not occur with VLC both used the internal GPU as this controls the display

I tried last year using a blackmagic eGPU (not pro version) and it would still stutter plus rendering was also slow

Right now render and sharing in FCPX is blazing fast but playback with the iGPU is painful

As there is no way to connect the LG display to the Vega 64 am thinking of ditching the display and get another 4K monitor that I can drive with the Display Port 1.4 

I do not do any gaming I only use this for office use and video editing

My question is if I connect a display to the Razer X Vega is the iGPU completely disabled or there will still be processes using it?

Also is it possible to pass audio through the Vega 64 so that I can drive the speakers of the new monitor?

Thanks for reading

Mac Mini 2018 3.2 Ghz 6 cores
Razer Core X enclosure with Sapphire Vega 64 Nitro
Benq PD2720U


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joevt
(@joevt)
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Joined: 3 years ago
 

The Vega 64 will have audio like every other graphics card.

An LG UltraFine 5K could be connected to the Vega 64 using a Thunderbolt 3 add-in card, but not sure that would help since it would be similar to the BlackMagic eGPU (except the Vega 64 is faster? And the LG's PCIe devices won't be visible to the Mac Mini).

 

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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(@massimo_franzese)
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Joined: 4 months ago
 

@joevt


As far as I understand I don’t have other slots on the Razer to add any cards

I also understand those cards are pass-through cards so the signal doesn’t go through the Vega and will ultimately result in the Thunderbolt display not be accelerated at all that I think is the flaw with the Blackmagic 

what I would need is an adapter to convert the output of the DP port to thunderbolt and I understand that doesn’t exist

thats the reason why I think you can only accelerate the output of the card from DP and HDMI ports

Hoping am wrong but this would be the reason why the blackmagic wasn’t accelerating playback either

Mac Mini 2018 3.2 Ghz 6 cores
Razer Core X enclosure with Sapphire Vega 64 Nitro
Benq PD2720U


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

@massimo_franzese

The Thunderbolt 3 add-in card will need to be powered with a riser (bitcoin mining), or PCIe slot in a Thunderbolt 3 expansion box, or a free PCIe slot of a computer. It won't have a connection to the computer, so you won't be able to use the PCIe devices of the display (USB controller for audio, brightness control, USB ports)...

The add-in card (GC-TITAN RIDGE or GC-ALPINE RIDGE) has two DisplayPort inputs that you connect to the GPU. Then it will transmit those signals over Thunderbolt to the display. The add-in card acts as an adapter to convert DisplayPort to Thunderbolt (for Thunderbolt displays) or USB-C with DisplayPort alt mode (for USB-C displays).
https://hardforum.com/threads/use-usb-c-monitor-without-usb-c.1911817/page-2
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 eGPU is different than every other eGPU, because the GPU inside the BlackBagic eGPU has it's DisplayPort outputs internally connected to the Thunderbolt controller in the eGPU, so that a Thunderbolt display connected to the downstream Thunderbolt 3 port of the BlackMagic eGPU will be driven by the GPU of the eGPU, and not the GPU of the computer.

 

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)
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Joined: 3 years ago
 
Posted by: @massimo_franzese

Hoping am wrong but this would be the reason why the blackmagic wasn’t accelerating playback either

The reason is something else, since the GPU in the BlackMagic eGPU is powering the display. You can see what GPU the display is connected to by going to About This Mac... -> Graphics/Displays.

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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(@massimo_franzese)
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Joined: 4 months ago
 

@joevt

Blackmagic was sent back last year. This is a mac mini does not have another display so once connected to the eGPU there is not other connection to the display itself

Regarding the riser etc the mini does not have any slots accessible and I have no slots in the Razer X so basically you say the options are

  • Get a riser card and a thunderbolt expansion
  • Get another enclosure for the riser card
  • Change the enclosure to a double PCI slot I think there is only one like that

Or otherwise sell the LG monitor and just get a 4K with DP 1.4 🙂 

Mac Mini 2018 3.2 Ghz 6 cores
Razer Core X enclosure with Sapphire Vega 64 Nitro
Benq PD2720U


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joevt
(@joevt)
Noble Member
Joined: 3 years ago
 
Posted by: @massimo_franzese

Get a riser card and a thunderbolt expansion

A powered riser slot that you can connect a Thunderbolt 3 add-in card to.
https://sewelldirect.com/products/pcie-riser-16x-to-1x
https://www.gigabyte.com/ca/Motherboard/GC-TITAN-RIDGE-rev-10#kf

Posted by: @massimo_franzese

Get another enclosure for the riser card

A Thunderbolt enclosure that can fit a Thunderbolt 3 add-in card.
https://www.sonnettech.com/product/echo-express-se1-tb3/overview.html

Posted by: @massimo_franzese

Change the enclosure to a double PCI slot I think there is only one like that

The Node Duo, but the eGPU would be limited to PCIe 3.0 x2.
https://www.akitio.com/expansion/node-duo
A Thunderbolt 3 enclosure with more than 2 slots (expensive):
https://www.sonnettech.com/product/echo-express-3d-tb3/overview.html
https://www.sonnettech.com/product/echo-express-3r-tb3/overview.html
https://www.sonnettech.com/product/echo-express-se3/overview.html
https://www.sonnettech.com/product/echo-express-se3e/overview.html

There are some 5K displays that don't require Thunderbolt.

4K only requires DisplayPort 1.2.

 

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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(@massimo_franzese)
Trusted Member
Joined: 4 months ago
 

@joevt

Thank you DP 1.4 is because of HDR support.

yesterday I got myself a monitor with HDMI DP and Thunderbolt 3 inputs connected the DP to the Vega 64 and now everything is accelerated 

I no longer have 5K but I can’t tell the difference with 27” size

the Razer X is large enough didn’t want add boxes

Mac Mini 2018 3.2 Ghz 6 cores
Razer Core X enclosure with Sapphire Vega 64 Nitro
Benq PD2720U


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