This MB design is supporting up to 95W power plan. But if the CPU with 125W and listed in support table, it means that this CPU has been test and qualified by ECS. Because it is out of specification, so there is an asterisk (*) marked at YES* to identify. In addition to the table listed CPU, other 125W CPU cannot be supported as well.
A780GM-A can support Black Edition 955 (C2)(125W) CPU which we have been tested, please refer the M/B CPU support List: