Just what I needed for my security camera setup. So far 5 cameras on Blue Iris only use 15-20% of the CPU. One issue I had was taken care of immediately by Amazon and TekRefurbs. I have added a USB 3.0 (5 ports) and an external 6TB disk. Very quiet fans - I have the box sitting next to me, within 1 foot, while working and can't hear it.90 day warranty gives me time determine if there are any defects.  Will update review if a big problem shows up and unable to get it fixed under warranty.