Which of these PC's are the best for gaming?

PC #1
Processor Type AMD FX-8320
Processor Speed 3.50 GHz
Processor Cores 8
RAM 8 GB DDR3 (1333 MHz DDR3)
Hard Drive Capacity 1 TB
Hard Drive Speed (Revolutions Per Minute) 7200 RPM
Optical Drive 24X DVD±RW Dual-Layer Super-Multi Drive
Pre-loaded Operating System Windows 8 64-bit
Graphics Card AMD Radeon HD7850
Dedicated Graphic Card Yes
Video Memory 2 GB
TV Tuner No

PC #2
Audio Integrated - Realtek ALC887
Bluetooth Enabled No
Cache 6 MB L3
Dimensions 17.5" H. x 7.75" W. x 21.25" D.
Energy Star Qualified No
Hard Drive Size 1TB
Hard Drive Speed 7200RPM
HDMI Port Yes
Media Card Reader No
Memory 8GB
Memory Expandable to 16GB
Memory Type DDR3 SDRAM
Network Card 10/100/1000 Ethernet
Operating System Windows 8
Optical Drive 24X DVD+-RW Dual-Layer Super-Multi Drive
Other Ports DVI, HDMI, DisplayPort, Audio Jack
Processor Intel Core i5-4590 Haswell 3.3GHz (Max 3.7GHz)
TV Tuner No
Video Graphics AMD Radeon R9 270X 2GB

PC #3
Audio Integrated - Realtek ALC887
Bluetooth Enabled No
Cache 6 MB L3
Dimensions 17.52" H. x 7.30" W. x 20.51" D.
Energy Star Qualified No
Hard Drive Size 2TB
Hard Drive Speed 7200RPM
HDMI Port Yes
Media Card Reader No
Memory 8GB
Memory Expandable to 16GB
Memory Type DDR3 SDRAM
Network Card 10/100/1000 Ethernet
Operating System Windows 8
Optical Drive 24X DVD+-RW Dual-Layer Super-Multi Drive
Other Ports DVI, HDMI, VGA, Audio Jack
Processor Intel Core i5-4590 Haswell 3.3GHz (Max 3.7GHz)
TV Tuner No
Video Graphics NVIDIA Geforce GTX750 1GB

PC #4
Audio Integrated - Realtek ALC887
Bluetooth Enabled No
Cache 6 MB L3
Dimensions 16.69" H. x 7.52" W. x 19.29" D.
Energy Star Qualified No
Hard Drive Size 1TB
Hard Drive Speed 7200RPM
HDMI Port Yes
Media Card Reader No
Memory 8GB
Memory Expandable to 16GB
Memory Type DDR3 SDRAM
Network Card 10/100/1000 Ethernet
Operating System Windows 8
Optical Drive 24X DVD+-RW Dual-Layer Super-Multi Drive
Other Ports DVI, HDMI, VGA, Audio Jack
Processor Intel Core i5-4460 Haswell 3.2GHz (Max 3.4GHz)
TV Tuner No
Video Graphics AMD Radeon R7 250X 1GB

PC #5
Audio Integrated - Realtek ALC887
Bluetooth Enabled No
Cache 4 MB L2
Dimensions Dimensions: 17" H. x 7.6" W. x 19.75" D.
Energy Star Qualified No
Hard Drive Size 2TB
Hard Drive Speed 7200RPM
HDMI Port Yes
Memory 8GB
Memory Expandable to 16GB
Memory Type DDR3
Network Card 10/100/1000 Ethernet
Operating System Microsoft Windows 8.1 64-bit Edition
Optical Drive 24X DVD±RW Dual-Layer Super-Multi Drive
Other Ports PS/2, RJ45 LAN Jack, audio jack, DVI, DisplayPort, HDMI
Processor AMD Kaveri A10-7850K Quad-Core, 3.7GHz
Video Graphics 2GB AMD Radeon R7 260X
Desktop Hard Drive Size 2TB
Desktop Operating System Windows 8
Desktop Processor AMD
Desktop Memory 8GB