[SOLVED] Using 24 pin motherboard to dual 8 pin pci-e for egpu dangerous?

[AlexsvonMüller]

I have this Old PSU bought from a computer shop because i found this converter on online shop that kinda interesting to me. Since my GT 740m couldnt handle post 2013 games im thinking of using an external gpu since i have an unused mining riser. Do you think it safe, not recommended, or should i just avoid it?

I dont have any gpu right now, but lets say the gpu require a single 6 pin power and a bit power hungry like gtx 550 ti, gts 450, etc.

PSU Interior
PSU Interior (Closer look)
PSU Spec Table

 

[Eximo]

I would not trust that PSU for anything I cared about, even if it was new.

There are simpler solutions to this problem, especially since GPUs are 12V only.

An expensive example, but things like this are out there in a more barebones fashion.

https://www.amazon.com/External-Independent-Discrete-Graphics-Interface/dp/B097NCBNJK

 

[hotaru.hino]

What I can scrounge up on the internet tells me that the 12V pins on the 24-pin connector are only good for up to 8A, assuming it's using 16g wire. So even under the best circumstances, I would avoid the converter because PCIe 8-pin requires 12.5A in total, so adding two of them easily exceeds what the 24-pin can provide.

 

[AlexsvonMüller]

I would not trust that PSU for anything I cared about, even if it was new.

There are simpler solutions to this problem, especially since GPUs are 12V only.

An expensive example, but things like this are out there in a more barebones fashion.

https://www.amazon.com/External-Independent-Discrete-Graphics-Interface/dp/B097NCBNJK

That looks like an exp gdc...Thank you sir, i take that answer as "I should avoid it"

 

[AlexsvonMüller]

What I can scrounge up on the internet tells me that the 12V pins on the 24-pin connector are only good for up to 8A, assuming it's using 16g wire. So even under the best circumstances, I would avoid the converter because PCIe 8-pin requires 12.5A in total, so adding two of them easily exceeds what the 24-pin can provide.

Thanks, i just search for this a while ago on internet about 24 pin motherboard color code.

 

[InvalidError]

What I can scrounge up on the internet tells me that the 12V pins on the 24-pin connector are only good for up to 8A, assuming it's using 16g wire.

#16 is overkill when standard MiniFit pins only go up to 9A and #18 is already good enough for up to 16A in ventilated enclosures. #16 is only really needed when using splitters or daisy-chained connectors.

The extra ESR can also help dampen ringing between the PSU, CPU and GPU bypass capacitor banks.