[Help!] Akitio Thunder2 and Power Overload: A Cautionary Tale
 
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[Help!] Akitio Thunder2 and Power Overload: A Cautionary Tale  

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ricky
(@ricky)
Eminent Member
Joined: 5 years ago
 
Posted by: Leeroy
Posted by: goalque

 

@Leeroy: Means that your TB card isn’t capable of drawing power from the PCIe x4 slot anymore. Be very careful with powered risers. It’s important to know which direction the power flows.

Those people who use Akitio without an auxiliary power connector on the GPU or GPUs such as reference RX 480, and feed over 75W through the DC jack and TB board, take a huge risk.

   

Exactly. That's how I fried the chip in the first place.

I'm no longer using a powered riser, and the PCIe is powered by your power bypass mod. The mod is not providing stable power for me hence causing reboots under high load for my RX480.

Thank you @goalque for the power bypass mod! Now I wish I had done it earlier...

So you fried the chip like the OP? And your compuer cant detect the eGPU am i right? And you are able to solve this by using the power bypass or the riser with power? Am i right

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ricky
(@ricky)
Eminent Member
Joined: 5 years ago
 

I just fried mine and the computer doesnt detect the GPU but detect the box.

IMG 1325

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John_Petrucci
(@john_petrucci)
Eminent Member
Joined: 5 years ago
 
Posted by: ricky

I just fried mine and the computer doesnt detect the GPU but detect the box.

IMG 1325

Do you use it to play?

It was overclocked?

STAFF


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

Let me ask: if you just replace the power brick so it feeds more power but you do not overclock then you can run a GTX 1050 or such safely?

Lenovo ThinkPad 25 -- GALAX SNPR TB3 1060 -- Lenovo Graphics Dock -- Benq BL2411PT - - two PackedPixels - Dasung not-eReader backer


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Yukikaze
(@yukikaze)
Noble Member Moderator
Joined: 5 years ago
 

Yes, there should be no issue. I am running a GTX1050Ti for quite a while now in such a configuration. I'd stay away from Furmark in any case, but nobody needs to run that thing anyway.

Want to output 4K@60Hz out of an old system on the cheap? Read here.
Give your Node Pro a second Thunderbolt3 controller for reliable peripherals by re-using a TB3 dock (~50$).

"Always listen to experts. They'll tell you what can't be done, and why. Then do it."- Robert A. Heinlein, "Time Enough for Love."

 
2012 Mac Mini [3rd,4C,Q] + RX 480 @ 10Gbps-TB1 (Atto Thunderlink) + macOS 10.15.7 [build link]  


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ricky
(@ricky)
Eminent Member
Joined: 5 years ago
 
Posted by: FricoRico

I'm not sure if the power relay modification might actually help you, but I think it does protect users from frying their Akitio boxes with more demanding GPUs that suck a lot of power through the PCIe slot. This is not actually a mod I came up with and is something people have been experimenting with over at the other forums.

This particular setup has been advised by Goalque to me. I don't think that Akitio's advice to only have a bigger power source into the barrel plug is very wise, because you basically run out of spec of the board.

In my setup I don't do any taping tricks and the board is not powered by the J4 cable bridge any longer. It involves some difficult soldering though.

First I remove the cable going from J4 to J2 on the Thunderbolt board, this cuts the power from the boards MOFSET.

I also soldered in C3 and C4, which are basically to stabilise incoming power from the barrel plug. Not really needed, but for some cards it can make a difference in stability.

Now for the hard part, where I connect two thick wires from the underside of J6 to A1, A2, B1, B2 on the PCIe slot. My cables came from a donor power supply that was broken, they are really thick making it hard to not overlap two pads and getting enough heat in them without melting the insulation. I created a bridge between A1 -> A2 and B1 -> B2 with some solder, but it is not particularly required.

After doing this, how do you power the board? Is it still by using molex or?

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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ricky
(@ricky)
Eminent Member
Joined: 5 years ago
 
Posted by: chx

Let me ask: if you just replace the power brick so it feeds more power but you do not overclock then you can run a GTX 1050 or such safely?

I use it just to play games, csgo, i never overclocked

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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ricky
(@ricky)
Eminent Member
Joined: 5 years ago
 
Posted by: FricoRico

I'm not sure if the power relay modification might actually help you, but I think it does protect users from frying their Akitio boxes with more demanding GPUs that suck a lot of power through the PCIe slot. This is not actually a mod I came up with and is something people have been experimenting with over at the other forums.

This particular setup has been advised by Goalque to me. I don't think that Akitio's advice to only have a bigger power source into the barrel plug is very wise, because you basically run out of spec of the board.

In my setup I don't do any taping tricks and the board is not powered by the J4 cable bridge any longer. It involves some difficult soldering though.

First I remove the cable going from J4 to J2 on the Thunderbolt board, this cuts the power from the boards MOFSET.

I also soldered in C3 and C4, which are basically to stabilise incoming power from the barrel plug. Not really needed, but for some cards it can make a difference in stability.

Now for the hard part, where I connect two thick wires from the underside of J6 to A1, A2, B1, B2 on the PCIe slot. My cables came from a donor power supply that was broken, they are really thick making it hard to not overlap two pads and getting enough heat in them without melting the insulation. I created a bridge between A1 -> A2 and B1 -> B2 with some solder, but it is not particularly required.

Is it just mine or  my c3 and c4 does not have the “drum” thingy? Did you add them yourself?

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ricky
(@ricky)
Eminent Member
Joined: 5 years ago
 
Posted by: lifecom

I had the same problem with the transistor FDC610PZ. But this position was not on sale in my city (need to wait for 2-3 weeks).
And I ordered an analogue from the availability: IRFTS9342TRPBF. Resolder and working perfectly. I think available for use any P-channel 30V MOSFET in TSOP-6 housing.

How did you resolder it?

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CoraDias
(@coradias)
New Member
Joined: 4 years ago
 

Hi....i am a new user here. As per my knowledge the two large drain and source traces are very obvious. The gate looks like it goes to that thin trace near it going diagonally, but double check it with a meter.You can run wires from the 4 drain pins to the right side of that large ceramic capacitor if you need to. If the pad near the source pin is blown out, you can scrape some of the green resist off the trace and put a jumper wire in the middle of those 4 vias.

https://www.7pcb.ca/PCB-Assembly-services/

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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