Dell Precision 7920 Rack: руководство по обслуживанию

System dimensions

Table 1. DimensionsThis table gives details of the dimensions of the Precision 7920 Rack system:
System	Xa	Xb	Y	Za (with bezel)	Za (without bezel)	Zb	Zc
Precision 7920 Rack	482.0 mm (18.98 inches)	434.0 mm (17.09 inches)	86.8 mm (3.42 inches)	35.84 mm (1.41 inches)	22.0 mm (0.87 inches)	678.8 mm (26.72 inches)	715.5 mm (28.17 inches)

Chassis weight

Table 1. Chassis weightThe table below shows the maximum weight of the Precision R7920 system:
System	Maximum weight (with all hard drives/SSDs)
3.5 inch hard drive systems	28.6 kg (63.05 lb)

Processor specifications

The Precision 7920 Rack system supports the following processors:

Intel Xeon E5-26xx v5 processor
Intel Xeon E5-26xx v6 processor
Intel Xeon Gold 52xx processors
Intel Xeon Silver 42xx processors
Intel Xeon Bronze 32xx processors
Intel Xeon Platinum 82xx processors
Intel Xeon Gold 62xx series processors

PSU specifications

The Precision 7920 Rack system supports up to two AC power supply units (PSUs).

Table 1. PSU specifications
The table below are the specifications for 1100 W, 1600 W, power supplies:
PSU	Class	Heat dissipation (maximum)	Frequency	Voltage	Current
1100 W AC	Platinum	4100 BTU/hr	50/60 Hz	100–240 V AC, autoranging	12 A–6.5 A
1600 W AC	Platinum	6000 BTU/hr	50/60 Hz	100–240 V AC, autoranging	10 A

NOTE:Heat dissipation is calculated using the PSU wattage rating.

NOTE:This system is also designed to connect to the IT power systems with a phase to phase voltage not exceeding 230 V.

NOTE:If a system with 1600 W AC PSU operates at low line 100–120 V AC, then the power rating per PSU is derated to 800 W.

System battery specifications

The Precision 7920 Rack system supports CR 2032 3.0-V lithium coin cell system battery.

Expansion bus specifications

The Precision 7920 Rack system supports up to eight PCI express (PCIe) generation 3 expansion cards, that can be installed on the system board using expansion card risers. The following table provides detailed information about the expansion card riser specifications:

Table 1. Expansion card riser configurationsThis table provides information about the expansion card riser configuration for Precision Rack 7920 system.
Expansion card riser	PCIe slots on the riser	Height	Length	Link	CPU
Riser 1C	Slot 1	Full Height	Full Length	x16	CPU1
	Slot 2	Full Height	Full Length	x8	CPU1
	Slot 3	Full Height	Half Length	x8	CPU1
Riser 2A	Slot 4	Full Height	Full Length	x16	CPU2
	Slot 5	Full Height	Full Length	x8	CPU2
	Slot 6	Low Profile	Half Length	x8	CPU1
Riser 3A	Slot 7	Full Height	Full Length	x8	CPU2
Riser 3A	Slot 8	Full Height	Full Length	x16	CPU2

Memory specifications

Table 1. Memory specifications
The table below shows the memory specifications for the Precision 7920 Rack system:
Features	Specifications
Minimum memory configuration	8 GB
Maximum memory configuration	3072 GB
Number of slots	24
Maximum memory supported per slot	128 GB
Memory options	1DPC (One DIMM per channel) 2DPC (Two DIMM per channel)
Type	DDR4 ECC or Non-ECC memory
Speed	Sky Lake Processors: 2666 MHz Cascade Lake Processors: 2933 MHz

Memory specifications

USB ports

The Precision 7920 Rack system supports:

Two USB 2.0-compliant ports on the front panel
One internal USB 3.0-compliant port
One USB 3.0-compliant port on the front panel
One micro USB 2.0-compliant port in the front panel for iDRAC Direct
Two USB 3.0-complaint ports on the back panel

NIC ports

The Precision 7920 Rack system supports up to four Network Interface Controller (NIC) ports on the back panel, which are available in the following configurations:

Four RJ-45 ports that support different combinations of 1Gbps and 10Gbps
One RJ-45 ports that support iDRAC9 Enterprise Network connector

NOTE:vFlsh card have dedicated slots on the system board.

VGA ports

The Video Graphic Array (VGA) port enables you to connect the system to a VGA display. The Precision 7920 Rack system supports two 15-pin VGA ports on the front and back panels.

Serial connector

The Precision 7920 Rack system supports one serial connector on the back panel, which is a 9-pin connector, Data Terminal Equipment (DTE), 16550-compliant.

Internal Dual SD module vFlash card

The Precision 7920 Rack system supports vFlash card.

Video specifications

The Precision 7920 Rack system supports integrated Matrox G200eW3 graphics controller with 16 MB of video frame buffer.

Table 1. Supported video resolution options
This table describes the supported video resolution options:
Resolution	Refresh rate (Hz)	Color depth (bits)
1024 x 768	60	8, 16, 32
1280 x 800	60	8, 16, 32
1280 x 1024	60	8, 16, 32
1360 x 768	60	8, 16, 32
1440 x 900	60	8, 16, 32
1600 x 900	60	8, 16, 32
1600 x 1200	60	8, 16, 32
1680 x 1050	60	8, 16, 32
1920 x 1080	60	8, 16, 32
1920 x 1200	60	8, 16, 32

NOTE:1920 x 1080 and 1920 x 1200 resolutions are only supported in reduced blanking mode.

Environmental specifications

NOTE:For additional information about environmental measurements for specific system configurations, see Dell.com/environmental_datasheets.

Table 1. Temperature specifications
The table below shows the optimal working temperature specifications:
Temperature	Specifications
Storage	–40°C to 65°C (–40°F to 149°F)
Continuous operation (for altitude less than 950 m or 3117 ft)	10°C to 35°C (50°F to 95°F) with no direct sunlight on the equipment.
Maximum temperature gradient (operating and storage)	20°C/h (68°F/h)

Table 2. Relative humidity specifications
The table below shows the relative humidity specification during operations and storage:
Relative humidity	Specifications
Storage	5% to 95% RH with 33°C (91°F) maximum dew point. Atmosphere must be non-condensing at all times.
Operating	10% to 80% relative humidity with 29°C (84.2°F) maximum dew point.

Table 3. Maximum vibration specifications
The table below shows the maximum vibration specifications during operations and storage:
Maximum vibration	Specifications
Operating	0.26 G_rms at 5 Hz to 350 Hz (all three axes).
Storage	1.88 G_rms at 10 Hz to 500 Hz for 15 min (all six sides tested).

Table 4. Maximum shock specifications
The table below shows the maximum shock specifications during operations and storage:
Maximum shock	Specifications
Operating	Six consecutively executed shock pulses in the positive and negative x, y, and z axes of 6 G for up to 11 ms.
Storage	Six consecutively executed shock pulses in the positive and negative x, y, and z axes (one pulse on each side of the system) of 71 G for up to 2 ms.

Table 5. Maximum altitude specifications
The table below shows the maximum altitude specifications during operations and storage.
Maximum altitude	Specifications
Operating	3048 m (10,000 ft)
Storage	12,000 m (39,370 ft)

Table 6. Operating temperature de-rating specifications
The table below shows the operating temperature de-rating specifications:
Operating temperature de-rating	Specifications
Up to 35°C (95°F)	Maximum temperature is reduced by 1°C/300 m (1°F/547 ft) above 950 m (3,117 ft).
35°C to 40°C (95°F to 104°F)	Maximum temperature is reduced by 1°C/175 m (1°F/319 ft) above 950 m (3,117 ft).
40°C to 45°C (104°F to 113°F)	Maximum temperature is reduced by 1°C/125 m (1°F/228 ft) above 950 m (3,117 ft).

Particulate and gaseous contamination specifications

The following table defines the limitations that help avoid any equipment damage or failure from particulate and gaseous contamination. If the levels of particulate or gaseous pollution exceed the specified limitations and result in equipment damage or failure, you may need to rectify the environmental conditions. Remediation of environmental conditions is the responsibility of the customer.

Table 1. Particulate contamination specifications
Air filtration specification: Data center air filtration as defined by ISO Class 8 per ISO 14644-1 should have a 95% upper confidence limit. Note: This condition applies only to data center environments. Air filtration requirements do not apply to IT equipment designed to be used outside a data center, in environments such as an office or factory floor. Note: Air entering the data center must have the MERV11 or MERV13 filtration. Conductive dust specification: Air must be free of conductive dust, zinc whiskers, or other conductive particles. Note: This condition applies to data center and non-data center environments. Corrosive dust specification: Air must be free of corrosive dust. Residual dust present in the air must have a deliquescent point less than 60% relative humidity. Note: This condition applies to data center and non-data center environments.
Particulate contamination	Specifications
Air filtration	Data center air filtration as defined by ISO Class 8 per ISO 14644-1 with a 95% upper confidence limit. NOTE:The ISO Class 8 condition applies to data center environments only. This air filtration requirement does not apply to IT equipment designed to be used outside a data center, in environments such as an office or factory floor. NOTE:Air entering the data center must have MERV11 or MERV13 filtration.
Conductive dust	Air must be free of conductive dust, zinc whiskers, or other conductive particles. NOTE:This condition applies to data center and non-data center environments.
Corrosive dust	Air must be free of corrosive dust. Residual dust present in the air must have a deliquescent point less than 60% relative humidity. NOTE:This condition applies to data center and non-data center environments.

Table 2. Gaseous contamination specifications
The copper coupon corrosion rate is <300 Å/month per Class G1 as defined by ANSI/ISA71.04-2013. The silver coupon corrosion rate is <200 Å/month as defined by ANSI/ISA71.04-2013.
Gaseous contamination	Specifications
Copper coupon corrosion rate	<300 Å/month per Class G1 as defined by ANSI/ISA71.04-2013.
Silver coupon corrosion rate	<200 Å/month as defined by ANSI/ISA71.04-2013.

NOTE:Maximum corrosive contaminant levels measured at ≤50% relative humidity.

Operating system

Your Precision 7920 Rack supports the following operating systems:

Windows 11 Pro, 64-bit
Windows 11 Pro for Workstations, 64-bit
Windows 10 Pro, 64-bit
Windows 7 Pro, 32-bit (downgradable)
Windows 7 Pro, 64-bit (downgradable)
RHEL 8.0
Ubuntu 16.04 LTS, 64-bit