https://en.wikipedia.org/wiki/Shared_graphics_memory explains how shared memory slows a system down when using an igpu. and since the spead and amount of ram in your laptop are almost guaranteed to be slower than his desktop ill promise you side by side he will outperform you.
passmark shows the desktop apu at 4217 and the mobile at 3387 so there is a difference from the desktop to laptop versions also.......read up a bit about how APU's work before giving bad advice. i have used AMD APU's for years in my builds and they are not as bad you think.
https://search.yahoo.com/yhs/search?p=a10+5700+arma+iii+gameplay&ei=UTF-8&hspart=mozilla&hsimp=yhs-004
https://video.search.yahoo.com/video/play;_ylt=A2KIo9iv7P1V71MAzMssnIlQ;_ylu=X3oDMTByZ2N0cmxpBHNlYwNzcgRzbGsDdmlkBHZ0aWQDBGdwb3MDMg--?p=A10+5700+Dayz+Stand+Alone+Gameplay&vid=70ae31b7200ba02e96dbbe0f6149b440&turl=http%3A%2F%2Ftse1.mm.bing.net%2Fth%3Fid%3DWN.7X%252fZpZpZo4mmczgdQ3iOyg%26pid%3D15.1%26h%3D169%26w%3D300%26c%3D7%26rs%3D1&rurl=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DEKw-YOq7vj4&tit=DayZ+%7C+The+Pilot-+Episode+3+%7C+A-10+Jet%2C+Hind+Attack+Heli%2C+Dogs&c=1&h=169&w=300&l=1945&sigr=11bedqp6b&sigt=11u8hcu6v&sigi=12n5ke1hf&age=1361320908&fr2=p%3As%2Cv%3Av&fr=yhs-mozilla-004&hsimp=yhs-004&hspart=mozilla&tt=b
Ejam4 i was referring to the other guy posting about his laptop.
check my links for how it will play.