It controls all the key components used in gaming like the CPU, hard drive , memory, graphics cards and sound cards… If you have good components then you will get better game performance as long as they are compatible with the mother boards. Are you having specific problems? Post your issues as well as your system specs and we can better advise.
Thought of this one last minute… If you have a motherboard with integrated sound and video then you may need top upgrade for better gaming performance. Those that are built into the motherboard are pretty generic and usually low quality.
The motherboard has almost no impact on your gaming performance – but it can have features that may matter to you outside raw in-game performance.
It may limit your future upgrade options to some extent, and lower-end motherboards might be a bottleneck for specific high-end configurations… but you’re not exactly going to drop $1000 on computer hardware and get the cheapest motherboard possible to cut the costs, are you?
Don’t fall into the trap of “GAMING” motherboards – your choice of a motherboard should be dictated by your needs, your upgrade plans and whether or not it offers any features that may be useful to either of the above rather than marketing gimmicks.