i am not seeing anywhere online where it says 140w or any wattage rating really. but if it supports a FX CPU with a AM3+ socket then it well should.
please contact AMD support:
http://support.amd.com/en-us to get help and to notify them of your problem.
this will notify AMD that there is an issue with certain motherboards not accepting certain chips that say they are compatible.
normally i would be able to assist you further but there is no reason apparent to me why this is happening. we only call the team in for INTEL PRODUCTS, NVIDIA GRAPHICS CARDS, and AMD GRAPHICS CARDS. sorry i could not assist you further. AMD support would be recommended or maybe someone with more experience with AMD will be able to answer your question.