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Rebooting system , problem with rx5700

hi . i have problem with my gpu i have 2 rx570 and 2 rx5700 . rx570 is working well but rx5700 have some problem and watchdog rebooting system . >teamredminer reboot
this is my crash pic

but my wachdog is off and gpu 0 is working well !!!
idk why my rig is rebooting . oh and my oc value set to default
and hashrate on rx5700 is too low its about 48
pls help me !!!