I manually set FAN_SETTING percentage and FAN_CTRL enabled to no then removed everything else below that.
<OVERDRIVE_PROFILE>
<PERFORMANCE_LEVEL level="2" gpu="90000" mem="30000" voltage="1088"/>
<PERFORMANCE_LEVEL level="1" gpu="55000" mem="30000" voltage="1038"/>
<PERFORMANCE_LEVEL level="0" gpu="15700" mem="30000" voltage="1000"/>
<FAN_SETTING percentage="75"/>
<FAN_CTRL enabled="no"/>
</OVERDRIVE_PROFILE>
then made a shell script to run overdrive on each card
export DISPLAY=:0.0
aticonfig --od-enable
AMDOverdriveCtrl -b -i 0 AMDOverDrive
AMDOverdriveCtrl -b -i 3 AMDOverDrive
AMDOverdriveCtrl -b -i 6 AMDOverDrive
works from an ssh session just fine as long as X, fglrx, and opencl are working properly
and once it's enabled aticonfig --odgc --adapter=all should show the memory going all the way down to the lowest point and be changeable with --odsc