eGPU Performance Loss - PCI Express vs. Thunderbolt
 
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eGPU Performance Loss - PCI Express vs. Thunderbolt  

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Gotsche
(@gotsche)
Active Member
Joined: 4 years ago
 

Thanks for the tests! So with an iMac late 2013 with TB1, a GTX 1060 should have the same Performance like a GTX 1080?

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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enjoy
(@enjoy)
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Joined: 4 years ago
 

@Gotsche - No, 1080 will performance better, here we test the performance drop of the GPUs!

With your iMac you will use External Display (Monitor) so go with 1080 if you can 🙂

01. 1060 (eGPU) vs. 1080 (eGPU) Internal Display test on 2016 MacBook Pro 13"

02. 1060 (dGPU Laptop) vs. 1080 (eGPU) External Display test with 2016 14″ Razer Blade

GTX 1060:

Unigine Heaven Benchmark   1080p   GTX 1060
Unigine Heaven Benchmark   1440p   GTX 1060

 

GTX 1080:

Unigine Heaven Benchmark   1080p   GTX 1080
Unigine Heaven Benchmark   1440p   GTX 1080

MacBook Pro (Retina, 15-inch, Later 2013) 3.2GHz Quad Core Intel i7-4750HQ / 8 GB 1600 MHz DDR3 / 256GB SSD + 1TB
mini eGPUPCI Express vs. ThunderboltMac CAN gameGaming Laptops vs. MacBook Pro with eGPU

 
2012 13" MacBook Air [3rd,2C,U] + GTX 1060 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12 [build link]  


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Gotsche
(@gotsche)
Active Member
Joined: 4 years ago
 

I want to use the internal display of the iMac because of no room for another Display... - the iMac is placed (removeable) at the dining table. No own room anymore since the child was born.

So - with the many problems and internal/external Display barriers (I'll Need to run windowed-mode games to get the eGPU Performance without an external Display - because I don't have an iGPU), I've a new plan:

If the external displaymode of my iMac works with TB3<->TB2/TB1 Adapter between iMac and a TB3-PC, I'll buy a gaming mini-PC with USB-C Interface to connect it to the Display of the iMac. If this  is working, I'm done. Advantages: full Performance of the PCIe Interface of the GPU. No bad Drivers and crazy modes... A mini-gaming-PC is not much bigger as the Akitio Node. Only the displayportinterface between the iMac and a PC. I'll test it...

 

 

 

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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enjoy
(@enjoy)
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Joined: 4 years ago
 

AKiTiO Thunder2 + EVGA GTX 1060 6GB SC + MacBook Pro (Retina, 15-inch, Later 2013) – Thunderbolt2 (16Gbps) Test:

GTX 1060 6GB in Desktop PC (PCIe slot 126Gbps)

GTX 1060 6GB in eGPU Thunderbolt 2 (16 Gbps) External Display: -16% performance drop

 GTX 1060 6GB in eGPU Thunderbolt 2 (16 Gbps) Internal Display: -24% performance drop

MacBook Pro (Retina, 15-inch, Later 2013) 3.2GHz Quad Core Intel i7-4750HQ / 8 GB 1600 MHz DDR3 / 256GB SSD + 1TB
mini eGPUPCI Express vs. ThunderboltMac CAN gameGaming Laptops vs. MacBook Pro with eGPU

 
2012 13" MacBook Air [3rd,2C,U] + GTX 1060 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12 [build link]  


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vava726
(@vava726)
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Joined: 4 years ago
 

According to my opinion the gap is less then 17% because the difference in terms of cpu performance between desktop environment and laptop one affects this kind of benchmark.

 

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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enjoy
(@enjoy)
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Joined: 4 years ago
 

Most of the eGPU users wants GTX 1080Ti, thanks to @konceptz we can see that we have -20% performance drop of the GPU on external display, on the Internal Display we have only macOS benchmarks but -35% performance drop was expected even for Thunderbolt 3!

GTX 1080Ti 11GB in Desktop PC (PCIe slot 126Gbps)

AKiTiO Node + GTX 1080Ti FE 11GB / MacBook Pro (Retina, 15-inch, Late 2016) Thunderbolt3 (32Gbps) External Display: -20% performance drop

Mantiz Venus + GTX 1080Ti FE 11GB / MacBook Pro (Retina, 15-inch, Late 2016) Thunderbolt3 (32Gbps) Internal Display: -35% performance drop

MacBook Pro (Retina, 15-inch, Later 2013) 3.2GHz Quad Core Intel i7-4750HQ / 8 GB 1600 MHz DDR3 / 256GB SSD + 1TB
mini eGPUPCI Express vs. ThunderboltMac CAN gameGaming Laptops vs. MacBook Pro with eGPU

 
2012 13" MacBook Air [3rd,2C,U] + GTX 1060 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12 [build link]  


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enjoy
(@enjoy)
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Joined: 4 years ago
 

We have full tests with GTX 1060 6GB on all Thunderbolt ports vs. Desktop PC & Gaming Laptop:

MacBook Pro (Retina, 15-inch, Later 2013) 3.2GHz Quad Core Intel i7-4750HQ / 8 GB 1600 MHz DDR3 / 256GB SSD + 1TB
mini eGPUPCI Express vs. ThunderboltMac CAN gameGaming Laptops vs. MacBook Pro with eGPU

 
2012 13" MacBook Air [3rd,2C,U] + GTX 1060 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12 [build link]  


Oliostro, precision01, nando4 and 2 people liked
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Fred.
(@fred)
Trusted Member
Joined: 4 years ago
 

Even on TB1 - External display it's still preforming great. Nothing to worry about!

mid-2012 11" Macbook Air + [email protected] (AKiTiO Node via TB3 to TB2 adapter) + Win10

 
2012 11" MacBook Air [3rd,2C,U] + GTX 1080 Ti @ 10Gbps-TB1>TB3 (AKiTiO Node) + Win10 [build link]  


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enjoy
(@enjoy)
Reputable Member
Joined: 4 years ago
 

I want to add some videos that confirms my tests:

This is a comparison between eGPU with GTX 970 (External Display) performance vs. desktop performance (GTX 970):


eGPU Internal vs External display comparison - GeForce GTX 1060 - Star Wars Battlefront

eGPU Internal vs External display comparison - GTX 970 -  The Division


eGPU with GTX 970 VS eGPU with GTX 1060 VS eGPU with GTX 1070 (External Display)

MacBook Pro (Retina, 15-inch, Later 2013) 3.2GHz Quad Core Intel i7-4750HQ / 8 GB 1600 MHz DDR3 / 256GB SSD + 1TB
mini eGPUPCI Express vs. ThunderboltMac CAN gameGaming Laptops vs. MacBook Pro with eGPU

 
2012 13" MacBook Air [3rd,2C,U] + GTX 1060 @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.12 [build link]  


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vava726
(@vava726)
Estimable Member
Joined: 4 years ago
 

An other interesting thing to explore is the performance drop is influenced by architecture (Pascal vs Maxwell).

Is worth to buy an old 980 or a 1060 ? The amount of dram vram is a variable that increases the drop ?

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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