Overall it's good, I'm pretty sure it will do better than my rig in games thanks to the graphics card (considering I've built mine in 2014), the processor is good for gaming and 8 GBs of RAM is also totally fine for now in games, make sure to get a single stick though so if you want to upgrade later and add some extra RAM you'll have a free slot on your motherboard.
As for the power supply, LC Powers are decent, but if you want to go for something a little bit more quality, then I can recommend you a VS series power supply from Corsair (I have one, a VS650, and after 3 years it's still going strong), or an Enermax Naxn (my brother owns one and after 2 years it still works perfectly) with 500 watts of power which are plenty to handle your components.
I'm recommending you these power supplies based on the pricings I have in my country so, unfortunately, they could differ depending on where you live.
So yeah congrats! Pretty cool rig indeed. ^^
I see no case though, did you think about one?