1: Have a good airflow in your case, with the Noctua fan you should achieve that.
2: Pcpartpicker will warn you if it sees a incompatibility in your build, the R7 260X isn't that long so it fits just fine.
3: you'll get one with the CPU, it will get the job done but better alternatives do exist.
4: Yes actually:
You should only go for 8GB of RAM, reason being that no games will use more than that, only real use for 16GB is when you go over to other software like video edition, but the FX4300 is probably going to be a much bigger bottleneck than the one you'll get from having 8GB vs 16GB RAM.
Having 8GB RAM instead of 16GB also allows you to get the FX8120, double the cores on the same CPU but with slighly lower Ghz on the cores.
Replace the Coolmax PSU, it's a very low quality psu and you won't need anywhere close to 900w, rather get a good quality 550w/500w psu.
Remove the Network adapter, the motherboard does come with onboard networking, most motherboards do. Don't know if you had some special purpose for this or not, if not then rather spend the $30 somewhere else.
You should get a more gaming oriented keyboard & mouse, the stock windows ones are made mostly for you to browse the web and use your programs, not for gaming, it even has a windows key on the side!! Oh god do we gamers hate that button. ^^
I've made this build with the changed above applied:
PCPartPicker part list /
Price breakdown by merchant
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($149.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($33.03 @ Amazon)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($89.78 @ OutletPC)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($70.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($54.98 @ OutletPC)
Video Card: Sapphire Radeon R9 280 3GB DUAL-X Video Card ($189.99 @ Newegg)
Case: Azza SIRIUS ATX Mid Tower Case ($34.99 @ Amazon)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($59.98 @ OutletPC)
Optical Drive: Asus DRW-24F1ST DVD/CD Writer ($14.99 @ Newegg)
Monitor: Acer G206HQLbd 60Hz 19.5" Monitor ($96.59 @ OutletPC)
Case Fan: Noctua NF-S12B redux-700 33.5 CFM 120mm Fan ($9.99 @ NCIX US)
Keyboard: Cooler Master CM Storm Devastator Gaming Bundle Wired Gaming Keyboard w/Optical Mouse ($27.66 @ NCIX US)
Speakers: Cyber Acoustics CA-2011WB 4W 2ch Speakers ($11.76 @ OutletPC)
Other: Microsoft Sculpt Mobile Mouse (43U-00001)
Total: $819.72
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-19 05:27 EDT-0400
(i don't know why it says that extra mouse in "others" just ignore it)
Because these changes actually left some headroom for the budget, i included a 212 EVO cooler, which will keep your CPU cool, even allow a small overclock, and i replaced the mobo for a more popular ASUS model in the same pricerange. I also replaced the gpu with something way better, you'll have no problems running Battlefield with this, Think you'll be able to play at Ultra settings if you disable AA and use x8 AF!
5: Yes your current build would allow you to play those titles, Battlefield at medium settings probably.
Hope this helped! Took some time to write so i hope you would "best solution" me if you felt like this was any helpful!
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