That card is okay, PassMark gives it a decent score: https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+RX+560&id=3708
To know what card GameGuru is using, launch the software then press the TEST GAME button and press F11. You will see a panel at the lower part of the screen which shows you the graphics card that has been enumerated and used by the software. If you see an integrated card showing, you need to open SETUP.INI and edit the "adapterordinal=0" to read as "adapterordinal=1". Hope this helps!
PC SPECS: Windows 10 64-bit, Intel Core i7-8700K, NVIDIA Geforce GTX 1080 GPU, 16GB SYSTEM RAM