Just a trick someone told me about to fix blackcipher lag.

Have you tried pressing 'View processes of all users' (or something similar, the button with the administrator shield next to it) and then changing the cores used? I recall you had to do that if you wanted to change the priority of Maple, which was needed after Big Bang in EMS.

Thanks, that works now. I'll have to experiment with this when I get back from vacation to see if it reduces video freezes during multi-kills in places like Commerci runs or the AMG (Ancient Mixed Golum) map.