Was wondering if this PC was good for gaming

Solution
Build your own, for a similar cost, and get a better system as a result.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($174.99 @ NCIX US)
Motherboard: ASRock H97 Anniversary ATX LGA1150 Motherboard ($71.95 @ SuperBiiz)
Memory: Mushkin Silverline 8GB (2 x 4GB) DDR3-1600 Memory ($59.99 @ Newegg)
Storage: Hitachi Ultrastar 1TB 3.5" 7200RPM Internal Hard Drive ($47.00 @ Amazon)
Video Card: XFX Radeon R9 280 3GB Black Edition Double Dissipation Video Card ($217.99 @ Amazon)
Case: Thermaltake Versa H22 ATX Mid Tower Case ($31.99 @ SuperBiiz)
Power Supply:...
The GTX 760 in that prebuilt is not the same as the proper version that Nvidia manufactures. Instead, that version of that graphics card would be substantially weaker. The normal GTX 760/Intel i5/8GB RAM can run Battlefield 4 max settings 2xMSAA at 60fps. Last time I checked ARMA/Day Z were in alpha or beta or something and people have problems running it well..
 
Build your own, for a similar cost, and get a better system as a result.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($174.99 @ NCIX US)
Motherboard: ASRock H97 Anniversary ATX LGA1150 Motherboard ($71.95 @ SuperBiiz)
Memory: Mushkin Silverline 8GB (2 x 4GB) DDR3-1600 Memory ($59.99 @ Newegg)
Storage: Hitachi Ultrastar 1TB 3.5" 7200RPM Internal Hard Drive ($47.00 @ Amazon)
Video Card: XFX Radeon R9 280 3GB Black Edition Double Dissipation Video Card ($217.99 @ Amazon)
Case: Thermaltake Versa H22 ATX Mid Tower Case ($31.99 @ SuperBiiz)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($69.99 @ NCIX US)
Optical Drive: LG GH24NSC0B DVD/CD Writer ($12.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) ($90.26 @ OutletPC)
Total: $777.15
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-17 17:10 EST-0500
 
Solution


This. You simply don't buy pre-build PC's unless you are buying them in for over 100 people. You build them yourself, it's a good experience, it teaches you about how your PC works and it gets a much better value/performance ratio.