can this gaming build play csgo dayz and arma 3 without any problems.

If you're going fx 8 core I've made some changes that will imo benefit you.
I wouldn't entirely trust the evga PSU with an 8 core/280 combo hence the 960 (it performs better anyway)

Drooped to an 8320 + very good aftermarket cooler (will hit 8350 speeds easily)

Motherboard is better IMO - wouldn't use anything else personally - its also $20 cheaper.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-8320 3.5GHz 8-Core Processor ($119.99 @ Micro Center)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($79.98 @ OutletPC)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($48.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($52.49 @ OutletPC)
Video Card: MSI GeForce GTX 960 2GB Video Card ($192.49 @ SuperBiiz)
Case: Corsair SPEC-03 Red ATX Mid Tower Case ($54.99 @ Newegg)
Power Supply: EVGA 500W 80+ Certified ATX Power Supply ($24.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.89 @ OutletPC)
Operating System: Microsoft Windows 8.1 (32/64-bit) ($98.89 @ OutletPC)
Other: Themis CPU cooler ($27.99)
Total: $719.69
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-08 02:13 EDT-0400
 
Stuckbyo your cheap choice of PSU - its not great but in all honesty the 960 is that power efficient it don't struggle - upgrade to a better one if you have the budget.

You'll get the 6300 up to 4.2ghz fairly easily on that board with the themis cooler.
At that speed it will outperform an 8350 in gaming.


PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($89.99 @ Micro Center)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($79.98 @ OutletPC)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($54.89 @ OutletPC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($52.49 @ OutletPC)
Video Card: MSI GeForce GTX 960 2GB Video Card ($192.49 @ SuperBiiz)
Case: Corsair SPEC-03 Red ATX Mid Tower Case ($64.99 @ Newegg)
Power Supply: EVGA 500W 80+ Certified ATX Power Supply ($24.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($18.89 @ OutletPC)
Operating System: Microsoft Windows 8.1 (32/64-bit) ($98.89 @ OutletPC)
Other: Themis CPU cooler ($27.99)
Total: $705.59
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-09 05:07 EDT-0400