AMD Radeon ™ HD 7650M no supported for the Vulkan graphics API ,perhaps this in future versions of the driver?
The HD765M has reached peak optimisation and been moved to legacy status, there will not be any further driver updates, including Vulkan drivers, for your product. More information available here.
The latest Crimson driver for your system is 16.2.1 and is available here.
The last Catalyst driver for your system is 15.11.1 Beta and is available here.