I bought this to replace an Optiplex GX620 with Intel Core2Quad, and WOW WOW WOW what a difference! This is a very very fast computer, and if youre a big nerd like me, it is very easy to upgrade this model and hot rod this little demon! If you pop in your own NVME SSD this computer has a digital license, so install is very simple. I cannot get over how fast this computer is! Really happy with this purchase! Thank you!