To mirror what others have said, 16GB is probably absolutely fine for most gamers. 32GB is nice, but in no way needed for VaM.
You will almost certainly have a pair of 2 * 8GB modules if you have 16GB currently. This means a fairly easy upgrade to 32GB if needed (add 2 more of the exact same memory you have) but will not gain you much if anything in VaM.
You will almost certainly have a pair of 2 * 8GB modules if you have 16GB currently. This means a fairly easy upgrade to 32GB if needed (add 2 more of the exact same memory you have) but will not gain you much if anything in VaM.



