I suppose your card is 8Gb model right?
And you're mining ETH?
It's always more difficult when information isn't provided.
"One of my RX580..." I assume means others are working using the same configuration and parameters.
Invalid shares are usually user error: wrong algo, wrong port, but if it's only happening on one card
it's a bad card.
I am sorry for missing the things. yes i have 2 rigs. others are working perfectly fine. i have attached the GPU-z details in above screenshot