Chipset PCIe slot not working Tomahawk x670E WiFi

1 I tested each stick individually and found only B2 slot working A1,A2 and B1 all fail with both sticks installed individually and

Yes, the topmost slot gets PCIe x16 lanes directly from the CPU, this is the fastest and most direct way for it to run The second x16

msi b450m provdh max m2 slot SSD slot onboard, PCIe x16 SafeSlots with PCIe Slot Q-Release, two Thunderbolt™ 4 ports, USB 20Gbps Type-C front-panel connector

msi slot Yes, the topmost slot gets PCIe x16 lanes directly from the CPU, this is the fastest and most direct way for it to run The second x16