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Rig crash when i change the oc settings

Hello, my second rig with three gpu crash when i change the oc settings. The cards are RX 5500xt, RX 5700 xt and RX 6700 xt. The rig crashes even if I only change the fan speed in the oc settings? does anyone have any idea why that is and how it can be changed? Greetings unlucky

The motherboard is a btc 37 8 card board