Dell OptiPlex 790 (Early 2011) - Manual (Page 84)

Memory
Capacity 1 GB, 2 GB, and 4 GB
Minimum Memory 1 GB
Maximum memory
Desktop, Mini-Tower, Small Form
Factor 16 GB
Ultra Small Form Factor 8 GB
Video
Integrated
• Intel HD Graphics
• Intel HD Graphics 2000
Discrete PCI Express x16 graphics adapter
Video memory up to 1.7 GB shared video memory
(Microsoft Windows Vista and Windows 7)
Audio
Integrated four Channel High Definition Audio
Network
Integrated Intel 82579LM Ethernet capable of
10/100/1000 Mb/s communication
Expansion Bus
Bus Type
• PCI 2.3
• PCI Express 2.0
• SATA 1.0, 2.0, 3.0
• USB 2.0
Bus Speed PCI Express:
• x1-slot bidirectional speed – 500 MB/s
• x16-slot bidirectional speed – 16 GB/s
SATA: 1.5 Gbps, 3.0 Gbps, and 6.0 Gbps
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