I’ve got an old Dell Inspiron 530 with a Foxconn G33 M02 motherboard. It has a 16x PCI e slot and a 1x slot. One of my XFX RX 580 cards mines great on the 16x slot, but when I try to run it through a riser it doesn’t seem to get power because the fans never spin and the blue power light doesn’t turn on. I’m afraid the risers are not compatible with the motherboard, but I can’t figure out how to test them. I’m using these https://www.amazon.com/gp/product/B071LQFCN4/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
but these ones didn’t work either (one had a bad trace on the 1x connector, but the other looked fine. got a refund) https://www.amazon.com/gp/product/B00IMYODGS/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1
I have a 1200W power supply http://www.thermaltake.com/products-model.aspx?id=C_00001780
and I am connecting the risers by molex. Some case fans are running off of the same molex so I know the risers have power available. the gpus are powered from the top aswell.
I tried pin shorting, but I can see that the 1x already has the pins shorted.