LG 5k Ultrafine + Hackintosh/windows SFF
 
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skol
 skol
(@skol)
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Joined: 1 year ago
 

I'm looking to build an itx/SFF hackintosh/windows pc to use with the LG 5k Ultrafine (first gen). I realise I need a Tb3 Alpine ridge AIC to get the full 40 gps to power the monitor. I'm struggling to find mini itx boards with the correct TB3_header. The case I was planning to use is the Streacom DA2 - Does anyone know of any itx boards with the tb3_header port and if it would fit in a SFF case like the streacom DA2

Many Thanks,

This topic was modified 7 months ago

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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skol
 skol
(@skol)
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https://www.asrock.com/mb/AMD/X570%20Phantom%20Gaming-ITXTB3/index.asp

 

This says it has full 40gps TB3 on the board. I can't find any other itx boards that have this. In theory, this should work with the LG 5k right?

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)
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Joined: 3 years ago
 

@skol

Only at 4K.

All Thunderbolt 3 controllers support 40 Gbps. Some only have two PCIe lanes (reduces PCIe bandwidth from 22 Gbps to 16 Gbps) but that doesn't reduce the bandwidth that can be used by DisplayPort for a display.

To use LG UltraFine 5K at 5K60, the Thunderbolt controller needs two DisplayPort inputs. Most PCs and laptops don't have two DisplayPort inputs. All Macs do. Many Macs have two Thunderbolt 3 controllers with two DisplayPort inputs each - to support two LG UltraFine 5K displays.

The X570 Phantom Gaming-ITX/TB3 only has one DisplayPort input. You should complain to them that you won't buy their piece of crap motherboard because it only has one DisplayPort input and therefore cannot support LG UltraFine 5K or Apple Pro Display XDR 6K displays.

Why does it say only 3 Thunderbolt devices can be detected? A Thunderbolt chain can support 6. Is this a limit placed on AMD by Intel?

Why doesn't it support eGPUs? What would stop a PC from supporting an eGPU (besides Windows)? Maybe their firmware is broken.

Why would DisplayPort 1.4 Input be limited to 4K60? DisplayPort 1.4 should allow 5K60 or 8K30 at 8 bpc. Are they using Alpine Ridge instead of Titan Ridge? This limit means that a 5K display that doesn't need two DisplayPort inputs would also not be supported.

 

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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Eightarmedpet
(@eightarmedpet)
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Joined: 3 years ago
 

I tested my 5k with my dual boot hack and it worked in windows, I’m guessing at 4K and maybe lower refresh rate? Never actually checked. I had an asrock fatality mobo, 270 something I think. 

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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skol
 skol
(@skol)
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Joined: 1 year ago
 

@joevt

Thanks so much for the in-depth response! I'm really scratching my head over this. You said it would work at 4k. Would that be 4k 60hz? 4k/60 would be fine for me. I was looking at this board specifically because it said it supported full 40gps but I understand that it is DisplayPort 1.4 over tb3 which is needed (yet it still wouldn't work as you mentioned). 

I originally wanted to build an intel based machine (easier time hackintoshing). 

https://www.asrock.com/MB/Intel/Fatal1ty%20Z270%20Gaming-ITXac/index.asp

Am I  correct in saying the Fatal1ty Z270 Gaming-ITX/ac would power the LG 5k @ 4k/ 60hz too? It says it supports 4k/60hz via display port 1.2 in the specs. I just want to be sure before purchasing. @ Eightarmedpet I think this would have been the Mobo you used too. 4k/60 would be fine 4k/30hz would be a dealbreaker though.

Thanks again for all your help!

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)
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Joined: 3 years ago
 

Posted by: @skol

You said it would work at 4k. Would that be 4k 60hz?

Yes, one DisplayPort signal over Thunderbolt 3 for the LG UltraFine 5K allows only 4K60.

Posted by: @skol

I understand that it is DisplayPort 1.4 over tb3 which is needed

For LG UltraFine 5K, it is two DisplayPort 1.2 over Thunderbolt 3 which is required for 5K60. Otherwise you are limited to 4K60.

Posted by: @skol

Am I  correct in saying the Fatal1ty Z270 Gaming-ITX/ac would power the LG 5k @ 4k/ 60hz too? It says it supports 4k/60hz via display port 1.2 in the specs.

Only 4K60. That motherboard has no external DisplayPort inputs. Therefore, the Thunderbolt controller is getting DisplayPort inputs from the Intel CPU's iGPU (integrated graphics) so it would be limited to Intel graphics.

The iGPU supports only three DisplayPort 1.2/HDMI 1.4 outputs. The Rear Panel I/O includes HDMI and DisplayPort 1.2. The HDMI port supports HDMI 2.0 which means the motherboard has a DisplayPort 1.2 to HDMI 2.0 chip. Anyway, there's only one output left from the iGPU to connect to the Thunderbolt controller. Therefore, only one 4K60Hz DisplayPort 1.2 display can be supported from the Thunderbolt port.

You should consider a display that does not require Thunderbolt.

A 5120x2880 DisplayPort 1.4 display is limited to 8bpc (a dual DisplayPort 1.2 display like the LG UltraFine 5K or Dell UP2715K allows 10 bpc).
iiyama 27 inch Prolite XB2779QQS-S1

A 5120x2160 DisplayPort 1.4 display can do 10bpc. It can also do 8bpc with DisplayPort 1.2 probably.
LG 34 inch 34WK95U.

 

 

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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Eightarmedpet
(@eightarmedpet)
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Joined: 3 years ago
 

Yep, the Fatal1ty Z270 Gaming-ITX/ac is what I had! Regret selling it now.

@joevt it sounds like @skol already has the display so he's trying to find a way to use it rather than what display to pair with a SFFPC.

Linus did a video where he used a mining card with no display out put to game on using the same technologies ogpu's rely on (Optimus and XConnect) and IIRC was surprised by the lack of performance lost. I never got round to testing mine properly but wonder if it would have worked much like gpu's do.

I rarely manage to get 5K in Windows with my set up anyway, for some reason Intel drivers cap it at 4K. I've had 5K available a couple of times but have absolutely no idea what changes/changed to prevent/enable that.

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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itsage
(@itsage)
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Joined: 4 years ago
 

If your main priority is to produce 5K Thunderbolt 3 monitor output, you don't really need a TB3 header on the motherboard. All you'd need is dual DisplayPort inputs from the graphics card and a good way to power the GC-ALPINE-RIDGE. An ITX build presents a challenge in that you can only have one PCIe slot for the dGPU. You could use a powered PCIe riser card but those are not reliable in providing consistent power to the AIC.

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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joevt
(@joevt)
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Joined: 3 years ago
 

AIC could be connected to an unused M.2 slot. Some ITX boards have two M.2 slots with one slot on the backside of the motherboard?

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

@joevt That's an excellent option I didn't think of. Do you have a recommended method to power the AIC through M.2 slot?

 

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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