2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (S...
 
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2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 350) + Win10 [philw]  

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philw
(@philw)
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Joined: 3 years ago
 

System specs:
Home Build Gigabyte Z390 Designare (w TB3), Core i9-9900K, 64GB, 2x GTX 1080TI, Win 10

eGPU hardware:
Sonnet eGFX, GTX 1070

Installation steps:
It just worked 🙂

Benchmarks:
Octane Bench 558

Comments:
Awesome Redshift & C4D rendering...

Given up on all my Macs...but successfully running: Gigabyte Designare Z390, Core i9-9900K, 64GB RAM, 2x Internal GTX 1080TI, 2x GTX 1070 eGPU (Sonnet eGFX)

 
2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 350) + Win10 [build link]  


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itsage
(@itsage)
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@philw Nice build! Do you know if the Thunderbolt 3 controller connects to the CPU or PCH on this board?

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2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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philw
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@itsage Unsure, sorry! And posting about my success obviously jinxed it. Was happily running all 3 GPUs, with 4 SATA SSDs and all network interfaces enabled... and now the 1070 has the dreaded Error 12. Can't get it back even with disabling a load of those resources.

So damn random! And to confuse even more, I switched the 1070 for an AMD RX580 and that worked fine.... 

I wish it would be either consistently great or consistently crap 🙂

Given up on all my Macs...but successfully running: Gigabyte Designare Z390, Core i9-9900K, 64GB RAM, 2x Internal GTX 1080TI, 2x GTX 1070 eGPU (Sonnet eGFX)

 
2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 350) + Win10 [build link]  


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joevt
(@joevt)
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The review at www.tweaktown.com says the Thunderbolt controller only uses two PCIe 3.0 lanes. That is either wrong or bad (should be 4 lanes).

The review says there's a HD3SS215 6.0 Gbps HDMI DisplayPort 2:1/1:2 Differential Switch to switch between the DisplayPort input and the iGPU. This is bad because the switch can't handle DisplayPort 1.4 (the review implies it can - probably wrong). To support DisplayPort 1.4, it would need to use a HD3SS214 8.1 Gbps DisplayPort 1.4 2:1/1:2 Differential Switch. Or maybe the switch is used for some other purpose. Maybe the review listed the wrong switch. Maybe Gigabyte overclocked the switch.

There's only one DisplayPort input, so 5K dual link SST DisplayPort 1.2 Thunderbolt displays can only be handled by the iGPU. DisplayPort 1.4 displays probably can't work because of the HD3SS215 switch.

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
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@joevt3 This photo of the motherboard shows one Titan Ridge [JHL7540] Thunderbolt 3 controller and two TI83 USB-C controllers so no chance the connection is x2 PCIe 3.0. @philw Can you run HWiNFO64 and expand the Thunderbolt 3 connection through the PCI Express root? Here are a couple of example what they look like; left is CPU attachment and right is PCH attachment.

Regarding error 12 can you tell us your procedure of connecting the GTX 1070 eGPU? Have you made changes in the BIOS under Peripherals > Thunderbolt? On my X99 Designare, I had Thunderbolt Boot Support [ENABLED] at eGPU connected at boot to be able to use it. Hot-plug doesn't work on this board for me.

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

 
2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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philw
(@philw)
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Here you go...

I'll check my Thunderbolt Boot Support option 🙂 Thanks!

HWiNFO64 Mv0XYEc9OJ

Given up on all my Macs...but successfully running: Gigabyte Designare Z390, Core i9-9900K, 64GB RAM, 2x Internal GTX 1080TI, 2x GTX 1070 eGPU (Sonnet eGFX)

 
2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 350) + Win10 [build link]  


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itsage
(@itsage)
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@philw Thank you! It's through the PCH but connected through x4 PCIe 3.0 connection like we thought. When you run CUDA-Z can you share the screen capture of the Performance tab for the GTX 1070 eGPU?

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

 
2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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philw
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Wait.... 

I enabled  the Thunderbolt Boot option... and restarted and no change. I then did a proper power cycle on the eGFX box and this time it has booted up and is working (but I've been here before!)... so I grabbed the GPU-Z while I could.... Thanks!

CUDA Z 0.10.251 64bit oeZBjDNyjs

Given up on all my Macs...but successfully running: Gigabyte Designare Z390, Core i9-9900K, 64GB RAM, 2x Internal GTX 1080TI, 2x GTX 1070 eGPU (Sonnet eGFX)

 
2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 350) + Win10 [build link]  


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itsage
(@itsage)
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Glad to hear it's working again without error 12. However there's something not right with your Thunderbolt 3 connection on this board. The Host-to-Device should be closer to 22XX while Device-to-Host should be closer to 27XX (full Thunderbolt 3 bandwidth). There are some strange things going on with TB3 support on desktop motherboards. I had a similar experience recently on my X99 TB3 build in that the Thunderbolt 3 connection dropped to half speed. Can you click on the PCI Express root port that hosts the eGPU and check for Current Link Width? It should be 4x but the numbers in CUDA-Z indicate it's at 2x or less.

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

 
2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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philw
(@philw)
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I think that will be because I had stepped it down to Gen 1 in the BIOS as part of the troubleshooting madness...

Switched it back...

CUDA Z 0.10.251 64bit eITJ8daG2W
CUDA Z 0.10.251 64bit QKX4CpscuR
CUDA Z 0.10.251 64bit j7KH6Y4XqS
HWiNFO64 4CJZNdWVqV
HWiNFO64 lJvVB8s6jW

Given up on all my Macs...but successfully running: Gigabyte Designare Z390, Core i9-9900K, 64GB RAM, 2x Internal GTX 1080TI, 2x GTX 1070 eGPU (Sonnet eGFX)

 
2018 Gigabyte Z390 Designare (GTX1080TIx2) [9th,8C,K] + GTX 1070 @ 32Gbps-TB3 (Sonnet Breakaway 350) + Win10 [build link]  


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