If you follow the extreme cpus guide, it recommends 1152 mb per instance.
After the credit applied for that SMP unit I jump 2 spots and now sit @ 56 uh were sort of neck and neck, but if you're down to just 1200PPD I'm likely to run away with this race @ 9,000-10,000 PPD. Just blame my GTX280 it tears through the smaller units and gets them done pretty quick. I do loose some ground around 5:30pm since my girlfriend shuts down my clients and you could make up some there.
Regards,
EE