Just did it and getting increase. This is cool. If you follow these instructions, just append amdgpu.vm_fragment_size=9 to what's already in the grub line so it's
GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0 consoleblank=0 amdgpu.vm_fragment_size=9"
Before
After

@clintar2, did you do that in SMOS with root login?
yes
Just asking for it because I'm not a linux user

Doing anything with linux (without icons/windows) is a nightmare for me. Just lack of proper knowledge.
Did you just logged on with root and then did all described text commands one by one exactly as they was described?