Dell OPTIPLEX 990 Service Manual download pdf (Page 90)

Expansion Bus

• x16-slot bidirectional speed – 16 GB/s

SATA: 1.5 Gbps, 3.0 Gbps, and 6 Gbps

Cards

PCI

Mini-Tower up to one full-height card

Desktop up to one low-profile card

Small Form Factor none

Ultra Small Form Factor none

PCI Express x1

Mini-Tower up to three full-height cards

Desktop up to three low-profile cards

Small Form Factor up to two low-profile cards

Ultra Small Form Factor none

PCI-Express x16

Mini-Tower up to two full-height cards

Desktop up to two low-profile cards

Small Form Factor up to two low-profile cards

Ultra Small Form Factor none

Mini PCI Express

Mini-Tower none

Desktop none

Small Form Factor none

Ultra Small Form Factor up to one half-height card

Drives

Externally Accessible (5.25–inch drive bays)

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