Pretty much what I said in the title (and what you can tell in all the questions about it).  How they build these so cheap is that all of the specifications are correct,  but the motherboard / memory / soundcard / hard drive / processor / etc etc will all be what is listed,  but will be from different companies and brands.  It makes it kind of difficult to update if you get a motherboard like mine,  which doesn't support dual video cards and which has 2 memory slots (64 gb is max so you need to buy two 32's and that's about 300$.  Or to upgrade the videocard to like an nvidia 2000 series,  you're basically looking at another 300$.  Unless you happen to get a motherboard that has 4 slots and is SLI compatible.  However,  really for the price,  this is a powerful machine.  If you want a better video card and more memory buy the 1600$ one.  Otherwise,  this thing handles pretty much everything i've thrown at it pretty well (Divinity Sin 2 ran at max settings and 4k kept a steady 40+ FPS.)  So again, great machine, and worth every penny,  but you never know what parts will be inside. It's almost like they have a huge warehouse of just random parts and they grab whatever fits the specifications and works together.