CPU OVERLOAD on 64bit

I just installed ANA 64 bit on logic X and when i had more poly… than 8 the sound started to crack and the CPU went CRAZY. Didnt do this on the 32 bit from what i remember.br
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I only had One instance of ANA and nothing else. and the CPU still when crazy.

why you have poly over 8? unless you are writing some seriously massive chord structures you should never need it above 4. otherwise all the releases just build up and take up all the CPU.