Erratic Load Utilization on one of 2 cards

[mmartoccia]

Does anybody have an idea as to why one of my cards load utilization would be erratic?   I've watched it fluctuate from 53% - 98% each time dropping the Mhs rate as low as 239 and as high as 308.

This is a 2 card system (6850 @ 965/845, 5850 @ 775/600) running BAMT with the new pahtk2.

Also worth noting -- when I stop mining then resume this same card wont break above 12Mhs.

Any ideas?  
  
UPDATE Most bizarre -- rebuilt the BAMT USB and all is well.  I must have messed up one of the conf files while optimizing.