Which gaming computer is best?

I'm looking into buying one of these computers. I need to be able to play games from Minecraft to call of duty

Here are the specs. I apologize if some is missing

Part number: - cs-gm02-lf tower size: - atx motherboard support: - micro atx and atx side window: - no power supply: - ps2 optional front ports: - usb 2.0 x1 - mic x 1 - aux x 1 expansion bays: - 5.25 - 3 - 3.50 - 1 - 3.50 internal - 5 cooling: - front: 12cm led fan - side: 25cm led fan - rear: 8cm fan optional watercooling: - no dimensions(d x w x h): - 460mm x 183mm x 410mm

Computer two
Operating System: Ubuntu 14.04
Processor: AMD Athlon X4 760K (3.8GhZ, can be overclocked)
Motherboard: MSI Military Class 4 A78M-E35
Graphics Card: Sapphire Radeon R7 260X (2GB Edition)
RAM: 8GB Crucial Ballistix Sport
Hard Drive: 1TB Western Digital Black
Power Supply: 430W Corsair CX430
Case: Corsair SPEC-01

Also. Can anyone tell me the minimum specs of a good gaming computer. I know you need 4+ RAM, but I don't know what's better when it comes to processors and video cards and such

Hmm… Linux Distro's don't support very many games on Steam or in general, so you might need to get a Windows OS if you want to play more games.

It might be better to get a GTX 750Ti, which might be a small bit more expensive, but garners more power for the system.

Finally, perhaps getting a little bit more powerful PSU, around 550W would be safer, as it performs better when it is operating a bit below it's max wattage.

The rest is perfectly good.