Yeah it kind of interesting. The added 5 ghz signal in the routers is misunderstood The 5 ghz signals are better for shorter range and more direct routes, less solid objects between the router and the PC. They can carry more data in theory but require more energy to do so. The lower 2,4ghz is a shorter wave length so it can travel through solid objects better and uses less power to go further.
The 2.4 is actually a better choose in most cases. The one exception is if there are a lot of devices in the house or the wireless network area that also use 2.4 ghz and a simple change of the radio in the router settings doesn't fix it. Or if the speed is more important then the range. although in most cases the 2.4ghz can outperform the 5ghz as far as speed