Not able to change my pcie gen for the first slot to 4.0

[Amathou]

I just recently upgraded my gpu from a 1660 super to a founders rtx 3070, on a ROG B550-A motherboard, in the top slot which says it should be able to be PCIE gen 4, my cpu is a ryzen 5 5600 which says it will be able to do gen 4, but in bios the max itll let me choose is gen 3. ive updated all my drivers and bios to the latest. im not using a riser and i have resizable bar enabled and the latest gpu firmware

[Jiaszzz_ROG]

Hello, @Amathou 

May I ask if your current BIOS version is 3002? Have you cleared the CMOS after completing the BIOS update?
If so, could you please verify the Bus interface or the PCIe X16_1 slot under default BIOS settings?
We also recommend checking if there is any dust or foreign objects in the PCIe X16_1 slot.

Thank you.

[Amathou]

bios version is 3002, i cleared the cmos, bus interface will go to a max of gen 3.0, and theres nothing in the slot

[Jiaszzz_ROG]

Hello, @Amathou 

In that case, we would suggest attempting a cross-test with the below methods:
- Cross-test other PCIe slots to confirm if it still shows 3.0.
- Cross-test the graphics card on other motherboards to verify if the bus interface is correct.
- Cross-test the installation of other graphics cards to check for any abnormalities in the motherboard slots.

Thank you.