cuz if there is only one RAM module installed, Dual Channel memory couldn't be enabled. For everyday use it's fine but since ur HD 7560D take system RAM the speed will be halved compared w/ Dual Channel RAM. (e.g. ur RAM speed is 1600mhz, Dual Channel can provide u 25.6GB/s memory bandwidth while Single can give u only 12.8Gb/s, it will severely restrain ur gfx performance.) So that's why i recommend u to install another 8GB memory. It's the best if u could buy another exactly same RAM, by reading the model and the brand of this RAM u've installed, through CPU-Z; otherwise at least buy another 8GB RAM, whose spec is the MOST similiar w/ ur old RAM and enable Dual Channel memory.
So if u could enable dual channel memory, ur gfx will be equal w/ GT 430 or HD 5570, which is better off by gaming. (but if it's single channel ur IGP is as worse as HD 6470 or GT 610, which are notorious low-end unplayable gfx )
Find a way to upload the photo and show us the link, or u could directly tell us how many amps(A) output on ur 12V rail.