Added another 4K of ram, a GForce-710 graphics card, and  a 1TB SSD.  Works like a champ, no problem whatsoever.  Excellent computer at the renewal price.  Renewal item looked like new and only evidence that it was not is the OEM version of Windows 10.  Although advertised as Win10 Pro it was delivered as Win 10 Home but that is not a problem for me.  Certainly recommend, especially if from the same vendor I used.