ok so I've edited the CFG and still 600 is the max I can hit no matter the number of times I have tried going up/down, open/close.
Does this require a reboot to enforce the below?
[ATIADLHAL]
UnofficialOverclockingEULA =
UnofficialOverclockingMode = 1
AccessibilityCheckingPeriod = 0
EnableUnofficialoverclocking = 1
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 2
AccessibilityCheckingPeriod = 0
mode 2 is what worked for me.