Why do I have less fps than other people at fortnite with the rx 580?

I saw a video that has 160 fps with the lowest settings.

But I have only 90 fps at what can that be?

Poor cable connections or the driver of the graphics card, what can that be because with a 144 Hz monitor and only 90 fps in public that always feels like I have 30fps

They may have more RAM, memory, or another CPU

So you think I should buy better RAM or RAM

The other components and software versions also have an impact on performance.

So can that be due to RAM or mainboard?

Yes

Rather RAM or CPU, usually motherboard Not.

Not necessarily, it depends on what it depends on.

Well… I don't know what kind of pc you have. Could you give me more information?

Ryzen 5 2600, 2 x 8 gb RAM dual kit, rx 580 red dragon, mainboard I think it's called msi b450m vhd pro

So a total of 16 GB RAM
and mainboard b450m pro vdh max not only pro
and the RAM 16 gb g.skill aegis ddr4 3000 dimm dual kit

Thanks to everyone it was due to the ram load I say now it was in bios 2133 mhz and I set it to 3000 mhz now I have more fps thanks