Fully integrated stuff, just slap a HDMI > VGA on it.
Can you get 15khz just from that ?
My issue with the AMD APU thing is that it seems to me a lot of what these are supposed to do on paper completely depends on what the mobo features and compatibility.
For instance recently I've looked into Ryzen and FreeSync, and turns out the requirements for having this feature actually work with monitors are foggy, few mobos have a DP out (especially the entry level ones which are already several times more expensive than anything Intel socket), and for the few monitors supposed to take FreeSync through HDMI the requirements are even more obscure.
15Khz output is not the same field but I just wanted to say; be careful with those AMD APU setups, don't take for granted that they'll do everything you expect just slapping them on any board, they're not as straightforward as the typical Intel and require careful reading/documentation.