Skip to main content
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.

Dell OptiPlex 7020 Mini Tower Owner's Manual


  • NOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click Start Start icon(Start icon) > Help and Support, and then select the option to view information about your computer.
Table 1. Processor
Processor type
  • Intel Core i3/i5/i7 series

  • Intel Dual Core series

Total CacheUp to 8 MB cache depending on processor type
Table 2. Memory
Type DDR3
Speed 1600MHz
 Mini-Tower, Small Form Factorfour DIMM slots
Capacity 2 GB, 4 GB, and 8 GB
Minimum Memory 2 GB
Maximum memory16 GB
Table 3. Video
Feature Specification
IntegratedIntel HD Graphics 4600 (i3/i5/i7 DC/QC Intel 8 Series Express chipset CPU-GPU Combo) and Intel HD Graphics ( Pentium CPU-GPU)
DiscretePCI Express x16 graphics adapter
Table 4. Audio
Integratedtwo channel High Definition Audio
Table 5. Network
IntegratedIntel I217LM Ethernet capable of 10/100/1000 Mb/s communication
Table 6. System Information
System chipsetIntel 8 series Express chipset
DMA Channelstwo 8237 DMA controllers with seven independently programmable channels
Interrupt LevelsIntegrated I/O APIC capability with 24 interrupts
Table 7. Expansion Bus
Bus TypePCIe gen2, gen3 (x16), USB 2.0, and USB 3.0
Bus SpeedPCI Express:
  • x1-slot each direction speed –500 MB/s
  • x16-slot each direction speed–16 GB/s
 SATA: 1.5 Gbps, 3.0 Gbps, and 6 Gbps
Table 8. Cards
 Mini-Towerup to one full-height card
 Small Form Factornone
PCI Express x1:
 Mini-Towerup to three full-height cards
 Small Form Factorup to two low-profile cards
PCI-Express x16:
 Mini-Towerup to two full-height cards
 Small Form Factorup to two low-profile cards
Table 9. Drives
Externally Accessible (5.25-inch drive bays):  
 Small Form Factorone slim-optical drive bay
Internally Accessible 
 3.5-inch SATA drive bays:  
 Small Form Factorone
 2.5-inch SATA drive bays:  
 Small Form Factortwo
Table 10. External Connectors
Feature Specification
 Front Panel
  • one microphone connector
  • one headphone connector
 Back Panel
  • one line-out connector
  • one line-in/microphone connector
Network Adapter one RJ45 connector
Serialone 9-pin connector; 16550 C compatible
Parallelone 25-pin connector (optional for minitower and small form factor)
USB 2.0:
  • Front Panel: two
  • Back Panel: four
USB 3.0:
  • Front Panel: two
  • Back Panel: two
  • 15-pin VGA connector
  • two 20-pin DisplayPort connectors
  • NOTE: Available video connectors may vary based on the graphics card selected.
Table 11. Internal Connectors
Feature Specification
PCI 2.3 data width (maximum) – 32 bits
 Mini-Towerone 120-pin connector
 Small Form Factornone
PCI Express x1 data width (maximum) – one PCI Express lane
 Mini-Towerone 36-pin connector
 Small Form Factornone
PCI Express x16 (wired as x4) data width (maximum) – four PCI Express lanes
 Mini-Towerone 164-pin connector
  Small Form Factorone 64-pin connector
PCI Express x16 data width (maximum) – 16 PCI Express lanes
 Mini-Tower, Small Form Factorone 164-pin connector
Mini PCI Express data width (maximum) – one PCI Express lane and one USB interface
 Mini-Tower, Small Form Factornone
Serial ATA: 
 Mini-Towerfour 7-pin connectors
 Small Form Factorthree 7-pin connectors
 Mini-Tower, Small Form Factorfour 240-pin connectors
Internal USB: 
 Mini-Towerone 10-pin connector
 Small Form Factornone
System Fanone 5-pin connector
Front panel control: 
  • one 6–pin connector
  • two 20–pin connector
  Small Form Factor
  • one 6-pin connector
  • one 10-pin connector
  • one 12-pin connector
  • one 20-pin connector
Thermal Sensor: 
 Mini-Towerone 2-pin connector
 Small Form Factornone
Processorone 1150-pin connector
Processor Fanone 5-pin connector
Service mode jumperone 2-pin connector
Password clear jumperone 2-pin connector
RTC reset jumperone 2-pin connector
Internal speakerone 5-pin connector
Intruder connectorone 3-pin connector
Power connector: 
 Mini-Tower, Small Form Factorone 8-pin, one 4-pin, one 6-pin, connector
Table 12. Controls and Lights
Feature Specification
Front of the computer:
 Power button lightWhite light — Solid white light indicates power-on state; blinking white light indicates sleep state of the computer.
 Drive activity lightWhite light — Blinking white light indicates that the computer is reading data from or writing data to the hard drive.
Back of the computer:
 Link integrity light on integrated network adapter Green — a good 10 Mbps connection exists between the network and the computer.
  Green — a good 100 Mbps connection exists between the network and the computer.
  Orange — a good 1000 Mbps connection exists between the network and the computer.
  Off (no light) — the computer is not detecting a physical connection to the network.
 Network activity light on integrated network adapterYellow light — A blinking yellow light indicates that network activity is present.
 Power supply diagnostic lightGreen light — The power supply is turned on and is functional. The power cable must be connected to the power connector (at the back of the computer) and the electrical outlet.
Table 13. Power
  • NOTE: Heat dissipation is calculated by using the power supply wattage rating.
 WattageMaximum Heat DissipationVoltage
Mini-Tower290 W989.00 BTU/hr100 VAC to 240 VAC, 50 Hz to 60 Hz, 5 A
Small Form Factor255 W870.00 BTU/hr100 VAC to 240 VAC, 50 Hz to 60 Hz, 4.4 A
Coin-cell battery3 V CR2032 lithium coin cell
Table 14. Physical Dimension
Mini-Tower36.00 cm (14.17 inches)17.50 cm (6.89 inches)41.70 cm (16.42 inches)9.40 kg (20.72 lb)
Small Form Factor29.00 cm (11.42 inches)9.30 cm (3.66 inches)31.20 cm (12.28 inches)6.00 kg (13.22 lb)
Table 15. Environmental
Temperature range:
 Operating5 °C to 35 °C (41 °F to 95 °F)
 Storage–40 °C to 65 °C (–40 °F to 149 °F)
Relative humidity (maximum):
 Operating20 percent to 80 percent (non-condensing)
 Storage5 percent to 95 percent (non-condensing)
Maximum vibration:
 Operating0.26 GRMS
 Storage2.20 GRMS
Maximum shock:
 Operating40 G
 Storage105 G
 Operating–15.2 m to 3048 m (–50 to 10,000 ft)
 Storage–15.20 m to 10,668 m (–50 ft to 35,000 ft)
 Airborne contaminant levelG1 or lower as defined by ANSI/ISA-S71.04-1985

Rate this content

Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\