GPU no detected

Hi,
we have a problem about GeForce RTX 2080 Ti, we have 4 of this model plugged on a Supermicro X11DPG-OT with Ubuntu 20.04.3 LTS, we installed the driver version 495.29.05 and CUDA v. 11.5. 2 of them there are not detected, however, after remove all the cards and plugged only the two cards failed on the motherboards, the O.S has detected them.
We would like to know if the v of the driver is correct or you recommend an update or downgrade.
Best regards!

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