Ok mate. I have recently put this together and it works fine, so if u buy the components you can put it together ur self and save over £500 when compared to sites that assemble pc's. Corsair 400r case, I5 3750k, Saphire hd 7850 2gig, 16gig balistix 1600 ram, SS 120gig HDD, 1TB HDD, Gigabite Z77-d3h which sometimes comes with an arctic cooler fan, 750W psu. You can assemble this in no time and it runs dayz on very high at around 40-60 fps.