Is this a good build?

You could do much better on the processor if your dedicating this to gaming.
https://www.amazon.com/Intel-Quad-C...&qid=1499005642&sr=1-1&keywords=lga+1150+4570
Yes even though its about 50 bucks more, however it'll do way much more then the pentium you are wanting.
I have this in my computer right now and not a single problem from it.
https://www.amazon.com/dp/B00EON40CS/ref=twister_B01G69E69E?_encoding=UTF8&th=1
You will want a psu with more watts especially with the graphics card you picked.
When you add on more hardware into your machine down the road you will have enough power to run it well enough.
 
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