As this HP Z820 Workstation is a Refurbished Computer, my review will be broken down in two parts.This first is the HP Quality that is inherently built into this Workstation. The build date on my unit was from 2013, and even as an eight year old computer it is impossible to build anything close to this for the money. The build quality is second to none. It is very quite, and is working flawless.The second part of this review is specific to the Amazon Seller: PC Server & Parts, that sold my specific workstation to me. My HP Z820 came with 128GB of Memory, 16 Core 2.6GHz CPU, 500GB SSD Hard Drive, plus a 2TB Traditional Hard Drive, as well as two NVIDIA Quarto 4000 Graphics Cards. Windows 10 Professional was already installed.The Amazon listing said that the workstation would have 16 - 8GB Memory cards, but I was pleased to find I actually revived 8 - 16GB Memory cards, so if I ever want to upgrade to 256MB of memory it will be very easy to do so. Also, it was to come with the 850W Power Supply, but mine had the upgraded 1125W Power Supply. This workstation is sold with no wireless network card, but in my case this is fine as it sits right by my router.The NVIDIA Quarto 4000 Graphics Cards are getting up there in age, but both work fine. The only thing that was odd, was that my old Dell 21" Monitors hooked up to the workstation via the DVI to DVI cable worked right away. But when I hooked up a new 27" Monitors via DispayPort to HDMI, I had to force the NVIDA App to find the display, which if I had not had the old monitors, I would not have been able to boot up using my new monitors.This workstation will service us for many more years to come.