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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.
Feature Specification
Processor type
  • Intel Core i3 series
  • Intel Core i5 series
  • Intel Core i7 series
  • Intel Xeon E3
Total cache Up 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.
Feature Specification
Type DDR4, NECC, and ECC
Speed 2133 MHz
Connectors Four DIMM slots
Capacity 4 GB, 8 GB, and 16 GB
Minimum memory 4 GB
Maximum memory 64 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)
Discrete PCI Express x16 graphics adapter
Table 4. AudioThis section gives you audio information.
Feature Specification
Integrated Two Channel High Definition Audio
Table 5. NetworkThis section gives you network information.
Feature Specification
Integrated Intel I219LM Ethernet capable of 10/100/1000 Mb/s communication
Table 6. System information This section gives you system information.
Feature Specification
System chipset Intel C236 chipset
DMA channels Two 8237 DMA controllers with seven independently programmable channels
Interrupt cevels Integrated I/O APIC capability with 24 interrupts
BIOS chip (NVRAM) 16 MB
Table 7. Expansion bus This section gives you expansion bus information.
Feature Specification
Bus type PCIe gen3 (x16), USB 2.0, and USB 3.0
Bus speed PCI 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.
Feature Specification
PCI None
PCI Express x4 Up to one low-profile card
PCI-Express x16 Up to one low-profile cards
Table 9. StorageThis section gives you video information.
Storage type Interface Capacity
2.5-inch SATA SSD SATA Up to 512 GB
M.2 SSD PCIe NVMe Up to 1 TB
2.5-inch,7200 RPM, HDD SATA Up to 1 TB
3.5-inch, 5400 RPM, HDD SATA Up to 4 TB
3.5-inch, 7200 RPM, HDD SATA Up to 2 TB
M.2 SSD, Self Encrypting Drive PCIe NVMe 500 GB, 7200 RPM or 2.5-inch, 500 GB, SSD
Table 10. DrivesThis section gives you drives information.
Feature Specification
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 accessible One Two One
Table 11. External connectorsThis section gives you external connectors information.
Feature Specification
Front panel One universal audio jack with microphone in and headphone connector
Back panel One line-out connector
Network adapter One RJ-45 connector
Serial One 9-pin connector; 16550 C compatible
USB 2.0 Front panel: two
Back panel: two
USB 3.0 Front panel: two
Back panel: four
HDMI out One
  • 15-pin VGA connector
  • two 20-pin DisplayPort connectors
NOTE:Available video connectors may vary based on the graphics card selected.
Table 12. Internal connectors This section gives you internal connectors information.
Feature Specification
PCI 2.3 data width (maximum) - 32 bits
Small Form Factor None
PCI Express x4 data width (maximum) - four PCI Express lane
Small Form Factor One 64–pin connector
PCI Express x16 (wired as x4) data width (maximum) - four PCI Express lanes
Small Form Factor None
PCI Express x16 data width (maximum) - 16 PCI Express lanes
Small Form Factor One 164-pin connector
Serial ATA
Small Form Factor Three 7-pin connectors
Memory Four 288-pin connectors
System fan One 4-pin connector
Processor One 1150-pin connector
Processor fan One 4-pin connector
Service mode jumper One 2-pin connector
Password clear jumper One 2-pin connector
RTC reset jumper One 2-pin connector
Internal speaker One 4-pin connector
Intruder connector One 3-pin connector
Power connector: One 8-pin. one 4-pin,
Table 13. Controls and lights This section gives you controls and lights information.
Feature Specification
Front of the computer
Power button light White light — Solid white light indicates power-on state; blinking white light indicates sleep state of the computer.
Drive activity light White 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 adapter Yellow light — A blinking yellow light indicates that network activity is present.
Power supply diagnostic light Green 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 14. PowerThis section gives you power information.
Power Wattage Maximum heat dissipation Voltage
Small Form Factor 180 W/240 W EPA 614/819 BTU/hr 100 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 battery 3 V CR2032 lithium coin cell
Table 15. Physical dimensionThis section gives you physical dimension information.
Physical Height Width Depth Weight
Small Form Factor 290.00 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 16. EnvironmentalThis section gives you environmental information.
Feature Specification
Temperature range
Operating 5°C to 35°C (41°F to 95°F)
Storage –40°C to 65°C (–40°F to 149°F)
Relative humidity (maximum)
Operating 20 percent to 80 percent (non-condensing)
Storage 5 percent to 95 percent (non-condensing)
Maximum vibration
Operating 0.26 GRMS
Storage 2.20 GRMS
Maximum shock
Operating 40 G
Storage 105 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 level G1 or lower as defined by ANSI/ISA-S71.04-1985

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