Do u need such a good motherboard??

Solution
With the same GPU and CPU at same clocks No. Better boards often have more features and can OC CPU's higher therefore can in directly affect performance.
with motherboards it the parts they use...the cheaper mb like msi are thinner then asus mb. also with cheaper mb the vrm used on the mb come into play. most good gaming mb have large vrms and heat sinks. lot of the cheap low end mb dont have heat sinks.