Dell OptiPlex 990 Desktop Service Manual page 94

Memory
Desktop, Mini-Tower, Small Form
Factor
Ultra Small Form Factor
Video
Integrated
Discrete
Audio
Integrated
Network
Integrated
System Information
System Chipset
DMA Channels
Interrupt Levels
BIOS Chip (NVRAM)
Expansion Bus
Bus Type
Bus Speed:
94
16 GB
8 GB
• Intel HD Graphics (with Intel
Celeron/Pentium-class CPU-GPU
combo)
• Intel HD Graphics 2000 (with Intel
Core i3 DC 65 W and Intel Core
i5/i7 QC vPRO 95 W-class CPU-
GPU combo)
PCI Express x16 graphics adapter
four Channel High Definition Audio
Intel 82579LM Ethernet capable of
10/100/1000 Mb/s communication
Intel 6 Series Express Chipset
two 82C37 DMA controllers with seven
independently programmable channels
Integrated I/O APIC capability with 24
interrupts
80 MB (10 MB)
PCI 2.3, PCI Express 2.0, SATA 3.0 and 2.0,
USB 2.0
PCI Express: