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PCIe_3 x16 stuck at x2 mode

Rizbon
Level 7

i Have Asus Code XI mobo with the next hardware:

i7 9700kf
2 stick of RAM (xmp profile)
RTX 4090 (PCIe_1) 
Avermedia Capture card (PCIe_3)
2 m2 ssds Samsung 970 PRO

The question is related to Capture card PCIe_3 x16 slot, it runs at x2 speed instead of x4 (what is capture card requires). 

A have change settings in BIOS to PCIe gen3, and PCIe_3 x4 mode, but no effect.

Any suggestions?

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