Is this a good build for my price range?

[JLyons]

Motherboard: Gigabyte GA-H110M-A Micro ATX LGA1151 Motherboard $53.89
CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor $199.98
Memory: G.Skill NT Series 8GB (1 x 8GB) DDR4-2400 Memory $33.99
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive $46.89
Video card: Asus Radeon R9 380 4GB Video Card $204.99
Case: Corsair SPEC-01 RED ATX Mid Tower Case $35.99
Power supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply $48.99
Case fans: Cooler Master SickleFlow 69.7 CFM 120mm Fan $4.99 (x2)
Optical drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer $17.78
Operating system: Windows 10 home $86.99
Total: $739.47
I'm a causal gamer and I'm currently looking to build my first gaming pc. I'd just like to run games on the highest settings with good fps. I wanted the price to be lower then it is because I'm also looking to buy a new monitor and keyboard/mouse along with it and only have $750 saved up right now. My questions are do I really need 750W power supply? Can I get windows 8.1 and upgrade to 10 for free? Will everything work together? Anything you guys see that I can switch out and save some money? and with this build what can I expect the quality would be when playing games, examples? Thank you!
pcpartpicker link: http://pcpartpicker.com/p/n7CLhM

 

[lodders]

comments
sensible mobo and CPU
An SSD will make a huge difference to your PC's responsiveness - get a samsung 850 evo 250Gb as well as your HDD
Get 2x4GB kit not 1x8Gb - makes a big speed difference
your power supply is pretty good, but there are better options on the toms hardware power supply tier list. 650W or more is about right.
Basically a very good build, but I would spend a bit more for something with no drawbacks....

 

[CtrlAltINTEL]

comments
sensible mobo and CPU
An SSD will make a huge difference to your PC's responsiveness - get a samsung 850 evo 250Gb as well as your HDD
Get 2x4GB kit not 1x8Gb - makes a big speed difference
your power supply is pretty good, but there are better options on the toms hardware power supply tier list. 650W or more is about right.
Basically a very good build, but I would spend a bit more for something with no drawbacks....

Agree with everything Lodders said, 1x8 is bad, run the 2x4 in dual channel. I've also heard that the Corsair Spec series are very hard to build in, so tell me how it goes.