Listing was for a Dell 990 Tower and I received a 790 series tower based on the service tag. Their response was " Both of these computers are 100% the same. Both of these are 2nd Gen Core i5 processor they are just 2 different series. The rest whole specs are the same." and "There is nothing to worry about. These are fully refurbished and they have passed all the QC tests. Thanks." Not quite true as the power supply and chipset are different as well as possible differences. This is a Christmas present so will not know how it works but will leave feedback then. This is the one shipped from SJ Computers LLC and not the one from Trivalley Electronics which was as advertised.