Radeon HD 7540D is an embedded GPU on the midle-class Trinity CPU A6-5400K.
Since the GPU doesn't have dedicated memory, the bandwidth will depend on the system ram speed which can be up to 1866MHz (the max speed supported by the CPU) meaning the operating memory speed is 933MHz and whether or not it's dual channel, as the bus width can be 64-bit or 128-bit.
Its core-clock is clocked at 760MHz and comes with 192 Shader Processing Units.
Radeon 7560D's performance depends a lot on driver support and varies from game to game in a way games in the same category (demanding, very demanding, etc) can be unplayable at the lowest settings or might run at medium/high settings.