EOS R5 - High pixilation in low light

[lsvasan]

Hi, Shooting with my R5  in low light with ISO greater than 1600 gives me a very grainy picture.  I dont have this problem when I use my 5D Mark IV. Any suggestions on I can avoid getting a grainy shot using my R5.

[lsvasan]

thank you. I will try using just the viewfinder and see how it help.