PC Upgrade

[zerq]

So, as Christmas is coming up I am planning to upgrade my graphics card. I have a budget of around $300 and would preferably like a nvidia card, I’m currently thinking a gtx 1060 but I am open to all input. I’m also not sure if I need to upgrade any other parts so it can be used. Keep in mind I built this at the end of 2014 as a budget gaming computer. 

Here are my current pc specs:
CPU : AMD A10 7850K @ 3.8GHz
RAM : 8GB Crucial Ballistix Sport
Motherboard : MSI A78M-E35
GPU : Gigabyte Geforce GTX 750
PSU : 430W Corsair CX430

I am practically clueless when it comes to this so any help would be much appreciated. 
Thanks,

- zerq