Dell OptiPlex 980 (Early 2010) - Manual (Page 5)

Memory - Integrated Up to 1759 MB shared video memory
(total system memory greater than 512
MB)
Audio
Integrated
Intel high definition audio
Network
Integrated
Integrated Intel 82578DM Gigabit
Ethernet capable of 10/100/1000 Mb/s
communication
System Information
Chipset
Intel Q57 Express chipset
DMA channels eight
Interrupt levels 24
BIOS chips (NVRAM) 64 Mb and 16 Mb
Expansion Bus
Bus type
PCI 2.3
PCI Express 2.0
SATA 1.0A and 2.0
eSATA
USB 2.0
Bus speed
PCI 133 MB/s
PCI Express x1-slot (wireless only) bidirectional speed
- 500 MB/s
x16-slot (wired as x4) bidirectional speed
- 2 GB/s
x16-slot bidirectional speed - 8 GB/s
SATA 1.5 GB/s and 3.0 GB/s
eSATA 3.0 GB/s
USB 480 MB/s
Cards
PCI
Mini-tower up to two full-height cards
Desktop without riser card — up to two low-profile
cards
with riser card — up to two full-height
cards
Small form factor one low-profile card
PCI Express x16 (wired as x4)
Mini-tower one full-height card
Desktop one low-profile card
Small form factor none
PCI Express x16