Reddit reviews Motherboard PCI Express 1 to 8 Mining Riser Card PCI-E x16 Data Graphics SATA to 8Pin Adapter Card for BTC Miner Machine Board
We found 2 Reddit comments about Motherboard PCI Express 1 to 8 Mining Riser Card PCI-E x16 Data Graphics SATA to 8Pin Adapter Card for BTC Miner Machine Board. Here are the top ones, ranked by their Reddit score.
Basically what this does is allow you to run 8 gpus to a single Pci-e 16x slot. So far from my experience it has worked very well, but does require a fair amount of playing around to get it working properly. It uses a plx chip to effectively double your lanes. It doesn't get around using over 4g decoding or anything else you'd normally need.
There have been complaints about one-two USB slots not working, which I have experienced with one bad slot. But 7 to 1 still isn't bad.
Costs about $100 and here's the Amazon link:
Motherboard PCI Express 1 to 8 Mining Riser Card PCI-E x16 Data Graphics SATA to 8Pin Adapter Card for BTC Miner Machine Board https://www.amazon.com/dp/B07571T721/ref=cm_sw_r_cp_api_CiAPAb8PCSE6X
Here is another Reddit post on this chip:
https://www.reddit.com/r/EtherMining/comments/6nwqsl/8_x_usb30_pcie_1x_to_8_port_1x_mining_rig_card/?st=JENBROHD&sh=e888cff7
Do you have an ITX motherboard? If not, I find it hard to believe that it only has 1 PCI-E slot.
To answer the question though, it's possible but expensive.