aticonfig --od-getclocks giving inaccurate info

[emergence]

It seems the 'aticonfig --od-getclocks' command is giving inaccurate info. When everything is idle, it gives me a memory clock of 1000mhz, but the ATI catalyst control center tells me that my memory's core clock is 900mhz. If the memory clock of 1000 is the current clock, why isn't it idling at 900, like the core clock?

Default Adapter - ATI Radeon HD 5800 Series 
                            Core (MHz)    Memory (MHz)
           Current Clocks :    400           [COLOR="Red"]1000[/COLOR]
             Current Peak :    725           1000
  Configurable Peak Range : [550-775]     [1000-1125]
                 GPU load :    0%