I have an i3 6100 in a Biostar TB250-BTC motherboard. CPU-Z reports my PCIe speed as x0. I'm using a known-good GPU. I've also tried a second of the same main boards, and a G3900 proc I had on had. Can anyone think of a reason why these boards don't seem to recognize any PCIe lanes?
Have you checked to see if there are any firmware (BIOS) updates available for this board. If so, install them and then test again...
Hope this helps,
Well, this could simply be a bug in the CPU-Z program, but I rather doubt it. You need to contact Biostar's customer support and have them report this issue to their BIOS engineers.
I have contacted Biostar but they don't have a solution. I'm going to return both motherboards. It is odd that this same issue is on two boards both tried with 2 different processors.