Beyond that, is there any other advantage(s) to using
a x64 OS other
 than RAM access beyond 4gb? Is there any 32 bit OS performance
 degradation when installed on a x64 machine?
      
 audio applications benefit from the increased number of available
 registers ... e.g. biquad filters can be computed entirely in registers
 without moving temporal data to the stack ...
 with my performance system (combination of supercollider and nova), i
 experienced a speedup of about 30%, when switching from an ia32 to an
 x86_64 system ...
    
 
 Tim,
 I dont know anything about how this works personally but recall seeing
 comments that possibly referred to this;
 that an application has to be coded specifically to take advantage of
 the 64bit system advantages?