Febsmart FEB-VER006C PCI-E x1 To PCI-E x16 Riser 6-Pack

I note these only have power input via SATA, be warned it's generally *not advisable* to drive a PCIE slot power requirements from a SATA cable. Melted cables/fires etc can result if too much current is drawn etc.

Some other risers accept molex and/or PCIE power connectors, which are up to the task/spec of PCIE slot and are far preferable.

For more see:
https://www.nicehash.com/blog/post/why-should-you-not-power-usb-risers-with-sata-power-connectors
https://www.reddit.com/r/NiceHash/comments/josdfl/why_are_sata_powered_risers_unstable/
https://i.imgur.com/Xg2wvF1.png