The console command mat_queue_mode defines how many cores the material system uses. mat_queue_mode -2 is the legacy value, -1 is auto, 0 is off, 1 is queued mode 1 thread, 2 is queued mode many threads. It reportedly increases FPS by a lot, but this command was unstable in 2007, but appears stable from TF2 onwards, and other 2013 mods appear to be experiencing no crashes. We need some people to test out the command and report their average FPS when using it with the value it was on by default (could be 2 already, no idea) and when using mat_queue_mode 2. Please report back in this thread.