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: 3 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)
Reputable Member
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 Smile

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: 3 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)
Reputable Member
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: 3 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: 3 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: 3 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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