Akito Thunder2 Resetting Whole Macbook Under Load
 
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Akito Thunder2 Resetting Whole Macbook Under Load  

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mac_editor
(@mac_editor)
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@noah_leon

Could be an issue with the Thunder2 as you surmise, given that you eliminated all other variables already. 

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Insights Into macOS Video Editing Performance

Master Threads:
2014 15-inch MacBook Pro 750M
2018 15-inch MacBook Pro

 
2019 13" MacBook Pro [8th,4C,U] + RX Vega 64 @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.14.6 & Win10 [build link]  


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Noah Leon
(@noah_leon)
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Joined: 3 years ago
 

PROBLEM SOLVED!

So I knew that the Thunder2 is finicky about the barrel-plug power supply. When I first received it a couple years ago, I made sure to increase the solder on the loose joints for the barrel plug. As far as I can see, there's still nothing wrong with it. Very sturdy.

I was searching this forum for people with similar problems, almost everyone with a crashing card had some power issue. I decided to try once more before giving up.

As a last effort I bypassed the barrel plug with a molex connector, soldering the yellow and black leads to the board correctly. I connected everything back up to my 500w PSU and voila, no more crashes. I have been editing in Final Cut Pro X for a little while now, and it has been very stable. 

So to recap, from my research and experience the power connection seems to be often the culprit when the card in the Thunder2 crashes. Even a seemingly correct barrel-plug configuration can cause instability. My guess is that it couldn't support the current traveling over it anymore, possibly due to heat from use the solder deteriorated. This will probably happen again with my own solder joints, I'll have to keep an eye on that in the future.

Thanks everyone for your help, this forum is a great resource.

Macbook Pro 15" 2013 with NVIDIA 750m and Akito Thunder2 and MSI AMD 560 OC, Mojave 10.14


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Branislav Benak
(@branislav_benak)
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Could you upload photos from you soldering work? THX. I'm also preparing for useful bypass.

1. Macbook Air 13" 2014 + Akitio Thunder2 RX560 (optional GTX1050Ti).
2. MacMini 2018 i3 + Sapphire Gearbox Vega 56.

 
2014 13" MacBook Air [4th,2C,U] + GTX 1050 Ti @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.13.6 [build link]  


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mac_editor
(@mac_editor)
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Joined: 3 years ago
 

@noah_leon

Awesome job figuring out the issue man! Will be a great resource for fellow Thunder2 users. 

purge-wranglertbt-flashpurge-nvdaset-eGPU
Insights Into macOS Video Editing Performance

Master Threads:
2014 15-inch MacBook Pro 750M
2018 15-inch MacBook Pro

 
2019 13" MacBook Pro [8th,4C,U] + RX Vega 64 @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.14.6 & Win10 [build link]  


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Noah Leon
(@noah_leon)
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Joined: 3 years ago
 

@branislav_benak

Here are the two soldering I did to get everything working.

IMG 6339 2
IMG 6340

Please note also that with this modification, I no longer have installed the little black and yellow cable that comes with the Thunder2 and goes between the two boards, as it is not really needed and I thought might make it unstable.

This post was modified 7 months ago

Macbook Pro 15" 2013 with NVIDIA 750m and Akito Thunder2 and MSI AMD 560 OC, Mojave 10.14


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Username
(@username)
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When I ran my Thunder3 and 1070 I fed them both with the same external HP 460w Server PSU. 
I made the 12v power cable split in two. One for the barrel plug and one into the case feeding the 1070 card. 

That way the pcb and case retained the original and unmodified state. 
And there was no voltage differences between power lines. 

Present: 2012 Mac mini + PowerColor RX 56 Vega Nano @10Gbps-TB1 + PowerColor Mini eGFX 180F via Apple TB3 to TB2 + macOS Catalina 10.15.4

Previous: 2012 Mac Mini + GTX1070 @ 10Gbps-TB1 (AKiTiO Thunder3 via Apple TB3 to TB2 adapter) + macOS

 
2012 Mac Mini [3rd,4C,Q] + GTX 970 @ 10Gbps-TB1>TB3 (AKiTiO Node) + macOS 10.12.4 [build link]  


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Noah Leon
(@noah_leon)
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Posted by: @username

When I ran my Thunder3 and 1070 I fed them both with the same external HP 460w Server PSU. 
I made the 12v power cable split in two. One for the barrel plug and one into the case feeding the 1070 card. 

That way the pcb and case retained the original and unmodified state. 
And there was no voltage differences between power lines. 

Thanks, in this case there was something wrong with the barrel plug, so I decided to bypass it completely. In my case my 500w PSU is also split in two, one going to the board via the molex connection, and the other connecting to the 8-pin and 6-pin input on the graphics card. I made sure everything is on the same rail and that it can deliver the necessary amps to power the card, because as you say it's better to keep the same voltage.

Every once in a while it still brings down the system, so I think there is more work to be done, perhaps the wire I used is not thick enough gauge, I don't know. At least it's only sometimes under very heavy load, never with games but only with video editing at full quality.

 

Macbook Pro 15" 2013 with NVIDIA 750m and Akito Thunder2 and MSI AMD 560 OC, Mojave 10.14


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Noah Leon
(@noah_leon)
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@goalque

Is there a chance that the power mod could fry my computer via the thunderbolt connection after this mod?

My internal 750m stopped working shortly after doing it to the enclosure. Graphics glitches and crashes. It may be a coincidence but I would be interested to know if it Could be potentially dangerous before I try it on another machine.

This post was modified 6 months ago

Macbook Pro 15" 2013 with NVIDIA 750m and Akito Thunder2 and MSI AMD 560 OC, Mojave 10.14


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Branislav Benak
(@branislav_benak)
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Hi. Today I had time for soldering. I did bypass of the fried chip FDC610PZ. The RX560 is again working. But the box is always running. I mean when the box is connected to 12V power source the fan inside the box and GPU fan is spinning with max rpm. After TB2 cable is connected to Mac the rpm is normalized and controlled by temp. Any suggestions?

1. Macbook Air 13" 2014 + Akitio Thunder2 RX560 (optional GTX1050Ti).
2. MacMini 2018 i3 + Sapphire Gearbox Vega 56.

 
2014 13" MacBook Air [4th,2C,U] + GTX 1050 Ti @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.13.6 [build link]  


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Noah Leon
(@noah_leon)
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@branislav_benak

I have the same issue. For now I solved it by using a PSU with a switch on it. When I unplug I just try to remember to turn it off. I think there is another mod that I could try but I’m satisfied with this setup for the moment, just to have it working again.

Macbook Pro 15" 2013 with NVIDIA 750m and Akito Thunder2 and MSI AMD 560 OC, Mojave 10.14


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