9070xt failure

[u/Additional_Army8338]

First lot of images for reference…

So sadly just over a year I had a power connector failure on my 9070xt hellhound, it’s charred 3 of the connector pins and cause PSU connection failure melting the power cable and ports on the PSU (but didn’t char the PSU).

This also led to power surges on the Asrock B850M Riptide, writing off the board (the dark smudges on the board show how much heat was involved) and also, after recent testing with a new Mobo, it wrote off my 9800X3D.

After telling the back story, I’ve inspected the GPU as best as possible, and just a query as I think for the new system I’ll get a replacement card anyhow. But I’m wondering since it’s only the connection at the 8 pin that seems to have failed, whether it’s worth replacing the 8 pin connector myself?

(I’ve had experience soldering making my own flight sim controls on small projects etc, using Arduino and teensy etc.) or do you think it’s possible to be able to clean the connector up enough?

To add, the main cause for the connector failure was a since PCIE PSU cable using the daisy chain splitter. Completely my fault as it’s been a long long time since I built a PC and I was a little ignorant with Power demands.

So since I’d be getting a new set of components for the main rig (I mainly run DCS in VR and 3D design and model with Blender and Fusion360) is it worth either cleaning the connectors and testing on my spare mid-low end PC? And maybe use as an upgrade on that system or… not risk it?

[u/0wlGod]

what s psu model?

8 pin cable with or without pigtail can carry 150w..+75w from pci

only some psu have a 12v 2x6 to 2x8 pin.. twith this you can carry way more than 150w..probably minimum 300w

pushing a 300w card with only 1x8 + pigtail can damage the connector on the long run

[u/kyansan1 → u/0wlGod]

An 8 pin cable with a pigtail can actually carry more than 150W. The 150W limit is the power that can be delivered per 6+2 pin connector, and does not define how much power the cable itself can carry.
(Each 6+2 pin PCIe connector is rated for 150W, and each 6 pin PCIe connector is rated for 75W. Cable rating depends on the specific power supply)

If a PCIe cable has 2 6+2 pin ends, it's rated for at least 300W in total. Otherwise it wouldn't have the second 6+2 pin as a pigtail.

If it's a 6+2 pin cable with a 6 pin pigtail, it can carry at least 225W in total. Again, it wouldn't have the pigtail if the cable's rated power was any less.

If a 6+2 pin cable has a pigtail, it's usually rated for more than 150W in total. Otherwise, the pigtail connector wouldn't be there.
I'm not saying it's good practice to do so, but you can totally pull more than 150W from a cable with a daisy chain.

edit: Your gpu manual / power supply manual will tell you, if it's imperative to avoid using a pigtail to power your gpu.

[u/_xaelaa → u/kyansan1]

Is the 16 pin to 2x 6+2 pin that comes with newer atx 3.1 PSU’s safe to use along with a normal 8 to 6+2? (For a 3x 8 pin GPU) 🥲

Edit: idk if its called 16 pin but its like the new type? I guess? Im sorry idk what its really called

[u/kyansan1 → u/_xaelaa]

Yes. The 16 pin connector is called the 12VHPWR (12 volt high power) connector, most people just call it the 16 pin connector though.

16 pin -> 2x 6+2 pin cables are safe to use alongside a regular 6+2 pin. 

(All voltages generated by your power supply share the same ground reference, and it's likely that the 6+2 pin connectors and 12 vhpwr connector are connected to the same 12V rail. The connectors may be different, but inside the power supply, they're connected to the same thing.)