DDR4 ram

That will only help if your CPU and bus speed presently exceed the speed of your RAM. It's a question of compatibility.

memory - What happens if I use RAM of a faster speed than the CPU supports? - Super User
https://www.reddit.com/r/buildapc/comments/1v6m3z/is_it_okay_to_put_faster_ram_in_a_slower/
[Solved] Install RAM with higher speed than CPU support - Forums - CNET

Do you have more than 1 stick of RAM at present? If you have 2 sticks you may be able to benefit from dual channel access.

Whether that will give an observable benefit in practice is another matter.

You have to look up your motherboard specs, it should tell you what rams speeds are compatible.

teots said:

I want to upgrade my system ram which is a ddr4 2133mhz. I whish to know if I can use a ram
with faster clock speed as long it's a ddr4 ram ?

Do you have XMP (eXtreme Memory Profile) applied in BIOS ? Which exact memory do you have ?

Let's start from basics. Default frequency of DDR4 is 2133MHz, anything over that can be considered overclocking. XMP is therefore considered overclocking by determined amount and settings defined in XMP. For it to work automatically, BIOS has to have that option. If not, most BIOS also have options to set memory manually to settings according to data in XMP. Apart from BIOS, chipset and IMC (Internal Memory Controller) built into processor also determine basic settings, like frequency and latency at every setting.
Unfortunately, brand name computer makers often release very constrained BIOS, without usual settings found in free market parts in order to sell only their parts at inflated prices.