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Dell Precision Tower 3420 Owner's Manual


NOTE: : Offerings may vary by region. For more information regarding the configuration of your computer in:

  • Windows 10, click Start Start icon > Settings > System > About.
  • Windows 8.1 and Windows 8, click Start Start icon > PC Settings > PC and devices > PC Info.
  • Windows 7, click Start Start icon, right-click My Computer, and then select Properties.

Table 1. ProcessorThis section gives you processor information.
Processor type
  • Intel Core i3 series
  • Intel Core i5 series
  • Intel Core i7 series
  • Intel Xeon E3
Total cacheUp to 8 MB cache depending on processor type

NOTE: : The Precision workstation 3420 has three processors that do not support onboard graphics.

Table 2. MemoryThis section gives you memory information.
Type DDR4, NECC, and ECC
Speed 2133 MHz
ConnectorsFour DIMM slots
Capacity 4 GB, 8 GB, and 16 GB
Minimum memory 4 GB
Maximum memory64 GB
Table 3. VideoThis section gives you video information.
Feature Specification
  • Intel HD Graphics 530 (Core i3/i5/i7)
  • Intel HD Graphics P530 (Select Xeon)
DiscretePCI Express x16 graphics adapter
Table 4. AudioThis section gives you audio information.
IntegratedTwo Channel High Definition Audio
Table 5. NetworkThis section gives you network information.
IntegratedIntel I219LM Ethernet capable of 10/100/1000 Mb/s communication
Table 6. System information This section gives you system information.
System chipsetIntel C236 chipset
DMA channelsTwo 8237 DMA controllers with seven independently programmable channels
Interrupt cevelsIntegrated I/O APIC capability with 24 interrupts
BIOS chip (NVRAM)16 MB
Table 7. Expansion bus This section gives you expansion bus information.
Bus typePCIe gen3 (x16), USB 2.0, and USB 3.0
Bus speedPCI Express:
  • x4-slot each direction speed – 4GB/s
  • x16-slot each direction speed – 16 GB/s
SATA: 1.5 Gbps, 3.0 Gbps, and 6 Gbps
Table 8. Cards This section gives you cards information.
PCI Express x4Up to one low-profile card
PCI-Express x16Up to one low-profile cards
Table 9. DrivesThis section gives you drives information.
Externally accessible (5.25-inch drive bay)One slim optical drive bay
3.5-inch SATA drive bays2.5-inch SATA drive baysPCIe drive bay
Internally accessibleOneTwoOne
Table 10. External connectorsThis section gives you external connectors information.
Feature Specification
Front panelOne universal audio jack with microphone in and headphone connector
Back panelOne line-out connector
Network adapter One RJ-45 connector
SerialOne 9-pin connector; 16550 C compatible
USB 2.0Front panel: two
Back panel: two
USB 3.0Front panel: two
Back panel: four
HDMI outOne
  • 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 This section gives you internal connectors information.
Feature Specification
PCI 2.3 data width (maximum) - 32 bits
Small Form FactorNone
PCI Express x4 data width (maximum) - four PCI Express lane
Small Form FactorOne 64–pin connector
PCI Express x16 (wired as x4) data width (maximum) - four PCI Express lanes
Small Form FactorNone
PCI Express x16 data width (maximum) - 16 PCI Express lanes
Small Form FactorOne 164-pin connector
Serial ATA
Small Form FactorThree 7-pin connectors
MemoryFour 288-pin connectors
System fanOne 4-pin connector
ProcessorOne 1150-pin connector
Processor fanOne 4-pin connector
Service mode jumperOne 2-pin connector
Password clear jumperOne 2-pin connector
RTC reset jumperOne 2-pin connector
Internal speakerOne 4-pin connector
Intruder connectorOne 3-pin connector
Power connector:One 8-pin. one 4-pin,
Table 12. Controls and lights This section gives you controls and lights information.
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 10 Mbps connection exists between the network and the computer.
Green — a 100 Mbps connection exists between the network and the computer.
Orange — a 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. PowerThis section gives you power information.
Power WattageMaximum heat dissipationVoltage
Small Form Factor180 W/240 W EPA614/819 BTU/hr100 V AC to 240 V AC, 50 Hz to 60 Hz, 4.0 A

NOTE: : Heat dissipation is calculated by using the power supply wattage rating.

Coin cell battery3 V CR2032 lithium coin cell
Table 14. Physical dimensionThis section gives you physical dimension information.
Small Form Factor290.00 mm (11.41 inches)92.60 mm (3.64 inches)292.00 mm (11.49 inches)6.30 kg (13.88 lb)

NOTE: : The weight of your computeris based on a typical configuration and may vary with different configurations.

Table 15. EnvironmentalThis section gives you environmental information.
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 30482000 m (–50 to 10,0006560 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

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