Our Dell OptiPlex 790 had an Intel Core i5-2400 3.1GHz processor running under the 32-bit version of Windows 7 Professional. There are four dual in-line memory slots on the 790.

RAM: 2 GB: Storage Capacity (as Tested): 250 GB: All Specs . PCMag Editors did not test the Dell Optiplex 790. We did, however, test and review the Dell Optiplex 780 (4 stars, ...

Review: Dell OptiPlex 790 desktop computer. ... There are larger cases available as well, if you need extras like memory card readers and extra card slots.