DELL OptiPlex 990 SFF desktop PC Intel Quad-Core i5 2.9-3.30GHz 8GB DDR3 1TB SSD DVDRW WiFi Windows 10 Pro

Compact desktop for everyday work

The Dell OptiPlex 990 SFF is a small-form-factor desktop built around an Intel quad-core i5 running at 2.9 to 3.30 GHz with 8 GB of DDR3 memory and a 1 TB 2.5-inch SSD. It ships with Windows 10 Pro 64-bit, a DVD±RW drive, integrated Intel HD Graphics 2000, Gigabit Ethernet and a USB Wi-Fi adapter. A USB keyboard and mouse are included so the system is ready for office tasks, study or light media use straight away.

Simple setup with SFF constraints

Installation is straightforward: connect power, monitor and peripherals, then follow the Windows 10 setup wizard. The small-form-factor chassis uses 240-pin DDR3 DIMM slots and 2.5-inch drive bays, so only low-profile expansion cards and 2.5-inch storage devices will fit. The external USB Wi-Fi adapter occupies one port and may need driver installation if Windows does not recognise it automatically. Buyers who need full-height add-in cards or 3.5-inch drives should choose a larger chassis.

Steady performance for sustained tasks

Under continuous load the quad-core processor operates within its 2.9 to 3.30 GHz range, while the integrated graphics share system memory. The SSD keeps boot and application launches consistent over long sessions, and the SFF cooling design maintains stable temperatures for typical office workloads. The 8 GB DDR3 limit and integrated graphics mean extended 3D rendering, heavy video editing or modern gaming will run into memory and GPU bottlenecks.