Cisco Switching/Routing :: Combined Power Mode For 6500 Switch?

The following discussion is based on cisco cat 6500 switches with two power supplies: p1 and p2.  . Both power supplies are running in combined mode .Each power supplies is rated with 500 watts max( I just picked 500 watts for simplicity)Combined mode In combined mode, each power supply provides approximately 83% of its  capacity to the chassis. This allows for greater utilization of the  power supplies and potentially increased PoE densities
 
1) Let say  our specific 6500 switch's configuration requires 1000 watts. We have two power supplies p1 and p2 ,each with rated power of 500 watts.  Both power supplies must operate in combined mode.  Will power supplies be able to meet the total load power requirement of  1000 watts?
 
Here is my understanding :The maximum power delivered by each power supplies is 83 percent of its rated power, assuming power supplies are running in combined mode.
 
So Maximum power delivered by power supplies

=  83% of p1+ 83% of p2
=  83% of 500 + 83% of 500
= 415 +415
=830 watts

Thus the required load of 1000 watts can not be met by our power supplies in combined mode. 
 
2 )Suppose our switch's switch configuration needs 500 watts.  Again our power supplies each rated with 500 watts, are configured for combined mode. How much power is being delivered by each power supply?  Is it 83 percent of the total load i.e 500 watts?