Bumping that 1200 up a little can help. Though I didn't want to complicate anyone's life with complex 64bit installation instructions or memory settings that are beyond what an average machine can do, so I left it as is. By far the easiest way to get around the OOM issues is to restart the game every now and then between matches. Out of curiosity, how long do you have to play before you see it happen with the default settings?