how can i prevent Google Chrome add websites files (cache) to my HDD?

I have Vista and its in

I mean if Chrome do not allow disabling caching, how to redirect this folder into RAM?

there is some way, which im unsure if works, But when i did it, Chrome Cache folder stopped being created by Chrome. I did it on Vista

Go to C:/Windows/System32 and right click cmd.exe file and select to Run it as Administrator
Then make symlink using mklink command

mklink /d "C:\Users\YourUsername\AppData\Local\Temp\" "W:\Temp"
(source directory has trailing slash, destination directory do not have)
to make this symlink make sure both directories do not exist, you may need to close Chrome.