Do I really need netduma smart qos for 1000/1000 mbit speed?

[Chaiyoabc]

Feel like having qos enabled has affect my hit registration 

[Netduma Fraser]

It really depends on what the usual network activity is when you're gaming, if it's streaming etc you're probably fine without but if anyone downloads while you're playing I would suggest keeping it on

[Newfoundland]

Depends on network and hardware. Most routers nowadays have enough grunt to handle that throughput fine without QoS  but older hardware will show its age. Ideally you want as little as possible regarding application processes run by a router unless you have some of the better architectures that can handle extra security, various QoS shaping, complex DPI and logging.