Is this a good build?Gaming pc

n ot a bad entry level gaming pc. make sure your using a good power supply and it 650w. if your thinking of putting in a larger gpu latter see what the cost is for a 750w unit. one thing to watch out for is both amd and nvidia have tapped out there next gpu and there dropping sometime in 2016. pascal and artic island.
 
Its a good build but the PSU is very low end, you will want to get a much better quality unit so it wont damage your other parts.

"Tier Four

Built down to a low price. Not exactly the most stable units ever created. Very basic safety circuitry or even thin gauge wiring used. Not for gaming rigs or overclocking systems of any kind. Avoid unless your budget dictates your choice."

Here's a good list of units.
Try to grab a Tier 1 or 2 PSU.

http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
 
Watch the gpu, I would recommend getting a psu with at least 750w so that you can upgrade later, also make sure it is a good and reliable main brand, because 1. If it fails you'll have to rewire everything again. 2. Bad gpu's can ruin your parts and shorten their life.
3. Just make sure it's at least 750w that way you can upgrade parts of need be in the future without worrying to much about how much power the parts may use, thus allowing you to chose from a larger variety of parts. (Just a side note, USE a SURGE PROTECTOR, or a decent UPS system in case the power blinks it won't damage your pc and if your working on something and the power goes out, you should have time to save your game/work document.)