Out of the box, the computer would not boot. Beeped 5 times, loud fans, black screen. The SKYTECH "tech support" didn't respond until the next day....figured it was easier to diagnose myself that wait for them because I wanted to use the computer immediately. I googled what the 5 beeps meant for this model and it pointed to a RAM issue. I went through a series of tests, removing and re-arranging the RAM sticks. I even rotated in 2 of my own sticks to make sure it was an issue with the motherboard and not the RAM itself. All said and done 2 of the RAM slots are broken. I got the computer to boot using only 2 of the RAM slots, so I use this computer with half the RAM it was advertised with, 4GB instead of 8GB. It comes with 4x 2GB RAM sticks, 2 of which I cannot use.