Question Is the PCI-E x1 slot of this motherboard faulty?

arham.amouei

Commendable
Oct 25, 2018
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As you may know, GPU risers are composed of two PCBs, one to be connected to a PCI-E slot on motherboard, and the other one has a PCI-E x16 slot for the graphics card. When I insert the former PCB in a PCI-E x1 slot on this 10+ years old motherboard, there is some short, and consequently, two traces on the PCB are burned. Then if I insert that damaged PCB in a PCI-E x16 slot on the motherboard, the graphics card works properly, with no problem that I can observe. This has happened with two different GPU risers, so I guess riser isn't the cultprit. By the way, the motherboard has only one PCI-E x1 slot.

How can I test if the motherboard or the graphics card is faulty without damaging other PCBs? And why does the damaged PCB work on a PCI-E x16 slot?
 

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