Hi, I'm a noob at this, so I'm just curious which of these computers I should get, and an estimate of the fps that the build could get. I apologize for my ignorance, and I'll be really grateful if somebody helped me.
Here are the builds:

Build #1
PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 760K 3.8GHz Quad-Core Processor ($79.98 @ Newegg)
Motherboard: MSI A78M-E35 Micro ATX FM2+ Motherboard ($56.99 @ SuperBiiz)
Memory: Corsair Vengeance 8GB (1 x 8GB) DDR3-1866 Memory ($66.98 @ Newegg)
Storage: Hitachi Ultrastar A7K2000 1TB 3.5" 7200RPM Internal Hard Drive ($84.99 @ Newegg)
Video Card: Sapphire Radeon R9 270 2GB Dual-X Video Card ($139.99 @ Newegg)
Case: Azza SIRIUS ATX Mid Tower Case ($24.99 @ Newegg)
Power Supply: Corsair Builder 500W 80+ Bronze Certified ATX Power Supply ($44.99 @ Micro Center)
Total: $498.91
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-03-27 17:34 EDT-0400

Build #2
PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 760K 3.8GHz Quad-Core Processor ($79.98 @ Newegg)
Motherboard: MSI A78M-E35 Micro ATX FM2+ Motherboard ($56.99 @ SuperBiiz)
Memory: Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory ($56.99 @ Adorama)
Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ Amazon)
Video Card: Sapphire Radeon R7 260X 2GB Video Card ($94.99 @ Newegg)
Case: Corsair SPEC-01 RED ATX Mid Tower Case ($37.99 @ Micro Center)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($34.99 @ Micro Center)
Wireless Network Adapter: Asus USB-N53 802.11a/b/g/n USB 2.0 Wi-Fi Adapter ($24.29 @ SuperBiiz)
Case Fan: Corsair Air Series AF120 Red 52.2 CFM 120mm Fan ($13.46 @ Mwave)
Total: $469.67
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-03-27 17:35 EDT-0400

Build #3
(Thanks to CaptainMurica for making this one)
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($64.99 @ SuperBiiz)
Motherboard: ASRock H97M Anniversary Micro ATX LGA1150 Motherboard ($60.98 @ Newegg)
Memory: G.Skill Ripjaws X Series 4GB (2 x 2GB) DDR3-1600 Memory ($36.97 @ NCIX US)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($48.99 @ NCIX US)
Video Card: EVGA GeForce GTX 750 Ti 2GB Video Card ($124.99 @ NCIX US)
Case: Fractal Design Core 1100 MicroATX Mini Tower Case ($36.25 @ Directron)
Power Supply: EVGA 500W 80+ Certified ATX Power Supply ($20.99 @ NCIX US)
Wireless Network Adapter: Gigabyte GC-WB867D-I 802.11a/b/g/n/ac PCI-Express x1 Wi-Fi Adapter ($29.99 @ SuperBiiz)
Monitor: Acer S220HQLAbd 60Hz 21.5" Monitor ($122.00 @ B&H)
Total: $546.15
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-03-27 17:36 EDT-0400

So..yeah! Thanks!