It's an okay medium PC for most games, however the question is:
Does Dayz run okay on any machines right now?
I don't have it but several people tell me it's still not running well (it's in early access still).
Not sure if that's the PC you own, but if not:
a) No point in an APU if you are buying a dedicated graphics card
b) if possible, get an i5-4590, i5-6400 or better CPU
I know the budget is probably tight, but many games have issues with weaker CPU's and I think Dayz does as well.