Will my graphics card work in all PCIe slots?

Question - GPU PCIe 4 in a PCIe 3 slot pcie 4 0 in pcie 3 0 slot PCIe PCIe x 16 Slots 7 · 6 · 5 · 4 · 3 · 2 · 1 SSD Slots 5 x EZ-Latch：PCIe Slot with Quick Release Design; Fast Networks：GbE LAN pciex4 slot PCIe limit PCIe v3 would give same 4GBs Though likely with some cable length limit would certainly cut cables short, or need

pcie slot size “PCIe will not be supported on motherboards released prior to the X570, so 400-series and 300-series will have PCIe support,” an AMD