Optimal RAM size for the fastest Ethereum Scrypt v3 cracking

[servercat]

Hi everyone!

Help me to evaluate RAM I needed for getting the most out of the Intel i9-10900KF, plz.
It has 10 cores, 20 threads.

Code:

hashcat -I
    …
    Processor(s)...: 20

So for $ethereum$s*262144*1*8*3436383737333838313035343736303637353530323430373235343034363130*8b58d9d15f579faba1cd13dd372faeb51718e7f70735de96f0bcb2ef4fb90278*8de566b919e6825a65746e266226316c1add8d8c3d15f54640902437bcffc8c3

  262144 (n - CPU/Memory cost parameter)
* 1 (r - blocksize for each mixing loop)
* 8 (p - parallelization factor)
* 128 (scrypt size)
= 268435456 Bytes
= 256 MB
* 20 (i9 Total CPU threads)
* ? what other factors should be considered here ?