Can I use a RX580 in PCI gen 2 for rocm 1.8.1 and tdxminer? I use an older PC for mining. 2 GPU are installed: Vega64 and RX580.

The Vega64 (PCIe x16 Gen 2 via riser) is ok and runs with 8 MH/s. The RX580 is plugged directly into a PCIe x16 Gen 2.
rocm-smi finds both cards, clinfo and tdxminer only the Vega64.