Hello, 
I installed my new RTx 3080 Ultra Just couple of days a ago , everything works fine and the card is preforming the way it should , i'm using an EVGA 1000 G2 with 3 separate cables from the power supply to the card , On z370 Asus maximus x formula this is not a new system and i had it for a about 2 years , when i first upgraded from my 2x 1080ti in sli like i mentioned everything worked fine but i heard 2 short beeps not separated   beeps but continuing 2 short beeps i checked on my RoG board error code screen and it showed error B2 , however it boot normally and everything works fine , i checked with google and it showed smoothing with the graphics card , i checked the card is not throttling and it's getting ample power , also it's seated correctly on the board , dose anyone know what might be the issue .
Thank you in advance