"Usually, you can put quite a few volts through the A10 chips, it really depends on the temps for your CPU. If they are good, you can typically push 1.5-1.6 volts, but I'd probably recommend no more than 1.55-1.6 volts for everyday use. Although, more than 1.6 is perfectly fine as long as the processor stays under 80 C.
The 1.65 volts it was using earlier should not have damaged the processor, it may have overheated a little but considering that it was only on that high for a few days it'll be fine. I know that KeithplaysPC got his 7870k to 5.5 Ghz using 1.75 volts so 1.65 isn't going to kill your processor unless the temp was bad.
So, in short: You are probably fine, 1.65 should not have damaged the CPU unless it was overheating. I'd also recommend that you manually overclock that processor, you can probably find a better mix of settings than the auto-overclock feature will be able to set. Usually you can find a advanced bios key of some kind to manually do volts, if not then just play with it a bit and see if you can't get the 4.4 Ghz with a lower amount of volts."
Thats what i found, soo it seems safe for it.
Happy gaming btw.
But usually lower voltage means less heat soo if you are willing to play around then sure, but if it works i wouldn't touch anything.