As long as you accept needing to supply external power with even a low-end GT 1030 card – as the PCI slot cannot provide ... even if high-performance graphics aren’t quite what PCI was meant ...

This is the maximum amount specified by the PCI Express standard for a x16 slot (PCIe 4.0 and 5.0 spec). If a graphics card requires more power, it will typically have additional power connectors ...