[asdfxD]

You can install tuned and set the tuned Profile to latency-Performance, the var Will Be the same 0.00x

The Important Part of the tuned Profile is „cpu_latency=1“ this will set your var to valules like 0.00x
cpu_latency=1 hold your Core frequency Constantly. If you set cpu_latency=0 you frequency spikes again and var is 0.1xx again.

But i Must say i Never saw a difference between var 0.1xx and 0.00x in gameplay. Var should Never go over 1ms .

Edit: stress all cpu cores is Not needed just stress 1 Core and var will go down Aswell

run stress -c 1 in Screen if you won‘t install tuned