The Optiplex 990 SFF we reviewed is equipped with a 3.4GHz Core-i7 2600 processor, 4GB of RAM, and an AMD Radeon HD 6450 graphics card. Windows 7 Professional is housed on the 500GB boot drive, ...

Dell Optiplex 990 What's more, with the optional power-sipping 240 watt power supply, the unit consumed just 22 watts during idle times, and peaked momentarily at 93 watts during benchmark tests.