PCIe Riser
A flexible cable or adapter that physically extends a PCIe slot so a GPU can sit somewhere other than directly on the motherboard.
A PCIe riser is a cable or adapter that lets you mount a graphics card away from the motherboard slot it would normally plug into. Risers come in two main flavours: shielded ribbon risers used inside ATX cases (typically PCIe Gen3 or Gen4) and powered USB risers used in open-air ETH-era mining rigs. For Malairte home miners building inside a normal case, a shielded ribbon riser is the right choice; powered USB risers are a poor fit unless you are building an open-frame rig. Riser quality varies wildly, and a bad riser can cause crashes, missing GPUs at boot, or PCIe link drops to lower speeds.