set com_HunkMegs "512"
set com_maxfps "125"
set com_soundmegs "192"
set com_zoneMegs "128"
set com_ignorecrash 1
showdrop 1
This are the settings, I use and i have no issues so far. Reason i have increased hunkmegs is because I was playing around openGL years back from ETL rendering perspective. You can put that to 256.
PS I am not active ET player but randomly fire up ETL when I have the issue on server. Other then that, I would take advice from active folks who are up-to date on latest ETL versions.