Since the new 17.4 Crimson update the R7 240 has no longer overdrive but Radeon Wattman.
i can no longer overdrive my card can't adjust memory clock settings no more only GPU.
but with memory i gained more fps ingame if i overclocked it.
For somehow AMD gave R7 240 Wattman but they can better return it back to Overdrive
Can i downgrade my software? or is there anyway i can make it work for the 240 with wattman.
You can downgrade to Catalyst 16.11.5. Unfortunately Overdrive has been retired, but it sounds like your GPU does not support all the features of Wattman. You might want to try using some third party software such as MSI Afterburner to control your clock speeds.