hi guys can u help me with this issue,

i have 2 rx5700xt.  their GPU clocks starts running mining at 1300mhz but after 2-5 minutes it starts dropping to 1100ish mhz. can you help me with this?

- cvddc 850 -cclock 1300 -mclock 1800

hashrate starts at 54mhs then drops to 48mhs because of gpu clock