Gaming PC cant handle games? What happened with my new PC?

[Mahesar]

I have been trying to play game in my new PC but it says can't handle your game yet no idea WHY?

My setup is:

Windows 10 Home 64-bit
Intel Core i9 9900KF CPU
2047MB Nvidia GeForxe RTX260
16 GB RAM
ASUSTek Computer inc. Prime Z390-P
27GN7 (1920x1080) 240hz monitor & LG IPS FULLHD (1920x1080) 60hz
1TB memory

What's wrong with my setup?

why doesn't it work?

I have already installed Windows 10 home by following to this:

 

[iXaidyiu]

What game? And what game settings (DX, Vsync, etc...)?