thanks alot guys...problem solved
one object had problem...by delete it ,render is ok now
i checked all objects in an isolate place and it found with several test renders
i updated the graphic drives but not solved
yes it is a hat shop and there is many hats in this plan but i had plans like this before like cosmetics shop but didnt happened this problem
thanks sir...no it is pc.but i didnt buy new graphic card because prices are too high here.any way this problem never happened before just happened in this project.think this pic is what you need