You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the dell optiplex 790 come out?" whose answer is 2011.
Each document should contain about 30 words, and these documents should contain useful information.

Query: release date of Dell Optiplex 790
Useful Output:

Doc 1: I am considering buying a dell OptiPlex 790 and replacing the PSU. Do any of you know the dimensions of the psu and if standard brands could replace it?
Doc 2: I have an Optiplex 790 with a build date code of 20120420. I went to Dell to translate it for me and they blew me off because it's warranty service date had
Doc 3: Dell OptiPlex Models by Year (1996-2024) ; Dell OptiPlex 790 USFF, 2011, Intel Gen2 i3/i5/i7; Celeron; Pentium;, Q65, 2 ; Dell OptiPlex 990 DT
Doc 4: DELL OptiPlex 790 DT Intel® Core™ i3 i3-2120 2 GB DDR3-SDRAM 250 GB Windows 7 Professional Desktop PC Black, Silver · Your IT dream machine
Doc 5: In May 2011, for example, when the OptiPlex 790 shipped, we stopped buying the OptiPlex 780. The Precision workstation model line, though