Yes , but there is no guaranty it will work . You have to play with those mobo's a little bit , have to find out which PciE you need to short , might need to short just 1 , might need to short all ... It's all motherboard dependant ....
There is a topic started 5 years ago about "List of motherboard that require shorting pin A1 B17 for pci-e 1x to work"
https://bitcointalksearch.org/topic/list-of-motherboard-that-require-shorting-pin-a1-b17-for-pci-e-1x-to-work-36061
of course this is not the complete list
It's all motherboard dependant. Some motherboard don't need presence shorting at all. Some need only 1 or 2 slots shorted, Some need all of them shorted. You will only need to short the slots that have the detection problems though. My EVGA 790i Ultra SLI motherboard needs all the slots shorted to detect cards on 1x risers. My Asrock 890GX Extreme4 only needs the 1x and the middle 16x slots shorted. My MSI Z77A-G45 has 7 PCI-E slots. Only 6 can work at the same time; 1 pci-e slot turns off entirely if the adjacent 1x slot is populated, and the 2 middle slots require presence shorting as well.
What I use for a wire is find an old molex to SATA power adapter (or any other adapter with similar wire thickness and you don't plan on using it), and cut off about a 4-5 inch long piece of wire. Strip off about a 1/4 inch on each end, and use your finger to bend 8 strands of wire off to the side; cut off the rest as close to the shielding as possible. Twist em together and insert each end into the proper holes on the PCI-E slot before you plug in your riser. When plugged it, they should have some resistance on being pulled out, though likely won't be much. You should be able to insert almost all of the bare wire into each hole if you cut it appropriately short.
