seems it's quite enough except maybe the gfx is a little bit weak.
So u've 8GB RAM. Could u open the side panel of the rig and figure sth out for us:
1. How many RAM modules are installed? If there is two, your gfx may max out imo.But if there is only one, use CPU-Z to figure out the speed, the brand and the model of this single memory and if possible, buy another exactly same one to plug in another slot.
2. Find the label of your PSU, take a picture and share it to us, or just figure out how many amps output on 12V rail. So we could figure out if is powerful enough to handle another HD 6570/6670 gfx to form dual graphic (hybrid crossfire) w/ the integrated GPU
We're appreciated if u can provide us these details.
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.