Question Just a little question about molex to 8 pin

[Power supply studdent]

i recently got a rx 580 2048sp 8gb version
i used my 350w power supply
i underclocked and undervolted the gpu to the maximum amount
i used a molex to 8 pin gpu and recently the black cable on the adapter got cut . when i plug it in my gpu and turned on my pc it worked! idk what happened can someone explain?

btw. my gpu was using only 40w maximum

 

[COLGeek]

Those types of adapters are never recommended by experienced/knowledgeable users. They are often very poorly made and can lead to catastrophic failures.

If you look at the adapter you showed in the picture, there is a bit of redundancy between the two Molex connectors and the PCIe connector. Damage to one of the black wires may be mitigated by that redundancy.

However, that puts a heavier load on the working part of the adapter and could lead to an overload on that connector.

You would be be advised to get a proper PSU in this system. One with the recommended wattage and proper connectors.