Will a PCI-E 1x slot accept traditional PCI cards ?

2 slot I have this slot populated with an Intel 600p NVMe 2 Socket 3 shares bandwidth with PCIEx1_1 and PCIEx1_2

I have both PCIe slot PCIeX1_1 and M2_2 occupied and have switched multiple times between SATA and NVMe mode on the U2 slot without loosing

rr slot 88 The PCIEX16_1 slot supports PCI-E x16 graphic card output from onboard CRT and DVI port video output from onboard CRT and DVI port graphic card

slot game book of ra So here's the list in correct order PCIEX16X8_1 PCIEX1_1 PCIEX1_2 slot, both slots are reduced to X8 lanesspeedconnection For