Sorry, spending $1500 on a PC to get a rattling tower back fan ruins this. There's another user review here showing himself screwing the back of the case to fix it. I tried that, it did not work. I called tech support, they sent me a tutorial on the front fans, I said it was the back CPU fan.I bought this $1500 pc with brand new everything precisely to not have to dig into the inside. What a let down that cheap components, APEVIA are the fans included were used.  Then the tech guy Raymond says I'd have to take the PC to best buy to get the fan worked on by Geek Squad or 3 weeks to send me a different system.  Oh joy, so I have to pay to fix what should have been tested beforehand?On the back is a sticker COMPLETE SYSTEM NOT TESTED.  I played 1 map of Call of Duty Modern Warfare, and that's when the fan started sounding like a fork was stuck in it. The MOST horrendous sound.  I've gone thru 4 or 5 PC rigs all with no issues. This is by far my biggest PC purchase and simultaneously the worst experience. Stay away.Cool looking case and rgb lighting but are you paying $1500 for a fork in fan nails on a chalkboard desktop at the end of the day, no. Extremely Disappointed.