The faster RAM that your PC has, the better your gaming performance will be. While RAM is not the most important aspect to consider, it is something that should not be ignored.
When looking at the RAM specifications, you should always look at the speed. While 2400 MHz may seem like a significant amount, it is slightly lower than the recommended amount needed for gaming.
Typically, if you want your games to run with no performance issues, you should be looking to purchase RAM that is above 3200 MHz. This is considered the optimum amount, though there is RAM available that is 4000 MHz.
However, you can still game using 2400 MHz successfully, but the performance will not be quite as good as it could be. This type of specification is better suited for an entry level PC, rather than for someone that is looking to take their gaming more seriously.