Any good gaming PC off amazon?

So later this month i'm gonna get a Gaming PC i'm looking for a good enough PC that run games like Dayz and RUST and minecraft without lag i'm looking for a PC worth $500 off just Amazon

CyberpowerPC Gamer Ultra GUA880 Desktop (Black/Blue) - $529 - http://www.amazon.com/...0089KDCIU/
Processor3.8 GHz
RAM8 GB DDR3
Hard Drive1 TB SATA III
Graphics CoprocessorNVIDIA GT610
Graphics Card Ram Size1024 MB

Avatar Gaming PC Gaming FX 6377OC Desktop (Black) - $499 - http://www.amazon.com/...00HA4TS5M/ -
Processor3.5 GHz FX-Series Six-Core FX-6300
RAM8 GB DDR3
Hard Drive1 TB SATA
Graphics CoprocessorAMD Radeon HD 7730
Graphics Card Ram Size1024 MB