Win32_PhysicalMemory class

Article
01/06/2021

The Win32_PhysicalMemory WMI class represents a physical memory device located on a computer system and available to the operating system.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

[Dynamic, Provider("CIMWin32"), UUID("{FAF76B93-798C-11D2-AAD1-006008C78BC7}"), AMENDMENT]
class Win32_PhysicalMemory : CIM_PhysicalMemory
{
  uint32   Attributes;
  string   BankLabel;
  uint64   Capacity;
  string   Caption;
  uint32   ConfiguredClockSpeed;
  uint32   ConfiguredVoltage;
  string   CreationClassName;
  uint16   DataWidth;
  string   Description;
  string   DeviceLocator;
  uint16   FormFactor;
  boolean  HotSwappable;
  datetime InstallDate;
  uint16   InterleaveDataDepth;
  uint32   InterleavePosition;
  string   Manufacturer;
  uint32   MaxVoltage;
  uint16   MemoryType;
  uint32   MinVoltage;
  string   Model;
  string   Name;
  string   OtherIdentifyingInfo;
  string   PartNumber;
  uint32   PositionInRow;
  boolean  PoweredOn;
  boolean  Removable;
  boolean  Replaceable;
  string   SerialNumber;
  string   SKU;
  uint32   SMBIOSMemoryType;
  uint32   Speed;
  string   Status;
  string   Tag;
  uint16   TotalWidth;
  uint16   TypeDetail;
  string   Version;
};

Members

The Win32_PhysicalMemory class has these types of members:

Properties

Properties

The Win32_PhysicalMemory class has these properties.

Attributes

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Attributes")

SMBIOS - Type 17 - Attributes. Represents the RANK.

This value comes from the Attributes member of the Memory Device structure in the SMBIOS information.

Windows Server 2012 R2, Windows 8.1, Windows Server 2012, Windows 8, Windows Server 2008 R2, Windows 7, Windows Server 2008 and Windows Vista: This property is not supported before Windows Server 2016 and Windows 10.

BankLabel

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64), MappingStrings ("MIF.DMTF|Memory Device|002.4")

Physically labeled bank where the memory is located.

Examples: "Bank 0", "Bank A"

This value comes from the Bank Locator member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalMemory.

Capacity

Data type: uint64
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device|002.5"), Units ("bytes")

Total capacity of the physical memory—in bytes.

This value comes from the Memory Device structure in the SMBIOS version information. For SMBIOS versions 2.1 thru 2.6 the value comes from the Size member. For SMBIOS version 2.7+ the value comes from the Extended Size member.

This property is inherited from CIM_PhysicalMemory.

For more information about using uint64 values in scripts, see Scripting in WMI.

Caption

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64), DisplayName ("Caption")

Short description of the object—a one-line string.

This property is inherited from CIM_ManagedSystemElement.

ConfiguredClockSpeed

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Configured Memory Clock Speed")

The configured clock speed of the memory device, in megahertz (MHz), or 0, if the speed is unknown.

This value comes from the Configured Memory Clock Speed member of the Memory Device structure in the SMBIOS information.

ConfiguredVoltage

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Configured voltage")

Configured voltage for this device, in millivolts, or 0, if the voltage is unknown.

This value comes from the Configured voltage member of the Memory Device structure in the SMBIOS information.

CreationClassName

Data type: string
Access type: Read-only
Qualifiers: CIM_Key, MaxLen (256)

Name of the first concrete class that appears in the inheritance chain used in the creation of an instance. When used with the other key properties of the class, the property allows all instances of this class and its subclasses to be identified uniquely.

This property is inherited from CIM_PhysicalElement.

DataWidth

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device|002.8"), Units ("bits")

Data width of the physical memory—in bits. A data width of 0 (zero) and a total width of 8 (eight) indicates that the memory is used solely to provide error correction bits.

This value comes from the Data Width member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalMemory.

Description

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Description")

Description of an object.

This property is inherited from CIM_ManagedSystemElement.

DeviceLocator

Data type: string
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Device Locator")

Label of the socket or circuit board that holds the memory.

Example: "SIMM 3"

This value comes from the Device Locator member of the Memory Device structure in the SMBIOS information.

FormFactor

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device|002.6")

Implementation form factor for the chip.

This value comes from the Form Factor member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_Chip.

(0)

Unknown

(1)

Other

(2)

SIP

(3)

DIP

(4)

ZIP

(5)

SOJ

(6)

Proprietary

(7)

SIMM

(8)

DIMM

(9)

TSOP

(10)

PGA

(11)

RIMM

(12)

SODIMM

(13)

SRIMM

(14)

SMD

(15)

SSMP

(16)

QFP

(17)

TQFP

(18)

SOIC

(19)

LCC

(20)

PLCC

(21)

BGA

(22)

FPBGA

(23)

LGA

HotSwappable

Data type: boolean
Access type: Read-only

If TRUE, this physical media component can be replaced with a physically different but equivalent one while the containing package has the power applied. For example, a fan component may be designed to be hot-swapped. All components that can be hot-swapped are inherently removable and replaceable.

This property is inherited from CIM_PhysicalComponent.

InstallDate

Data type: datetime
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|ComponentID|001.5"), DisplayName ("Install Date")

Date and time the object is installed. This property does not need a value to indicate that the object is installed.

This property is inherited from CIM_ManagedSystemElement.

InterleaveDataDepth

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 20|Interleaved Data Depth")

Unsigned 16-bit integer maximum number of consecutive rows of data that are accessed in a single interleaved transfer from the memory device. If the value is 0 (zero), the memory is not interleaved.

InterleavePosition

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device Mapped Addresses|001.7")

Position of the physical memory in an interleave. For example, in a 2:1 interleave, a value of "1" indicates that the memory is in the "even" position.

This property is inherited from CIM_PhysicalMemory.

Noninterleaved

First position

Second position

Manufacturer

Data type: string
Access type: Read-only
Qualifiers: MaxLen (256)

Name of the organization responsible for producing the physical element.

This value comes from the Manufacturer member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalElement.

MaxVoltage

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Maximum voltage")

The maximum operating voltage for this device, in millivolts, or 0, if the voltage is unknown.

This value comes from the Maximum voltage member of the Memory Device structure in the SMBIOS information.

MemoryType

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device|002.9")

Type of physical memory. This is a CIM value that is mapped to the SMBIOS value. The SMBIOSMemoryType property contains the raw SMBIOS memory type.

This value comes from the Memory Type member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalMemory.

Unknown (0)

Other (1)

DRAM (2)

Synchronous DRAM (3)

Cache DRAM (4)

EDO (5)

EDRAM (6)

VRAM (7)

SRAM (8)

RAM (9)

ROM (10)

Flash (11)

EEPROM (12)

FEPROM (13)

EPROM (14)

CDRAM (15)

3DRAM (16)

SDRAM (17)

SGRAM (18)

RDRAM (19)

DDR (20)

DDR2 (21)

DDR2—May not be available.

DDR2 FB-DIMM (22)

DDR2—FB-DIMM,May not be available.

DDR3—May not be available.

FBD2

DDR4 (26)

MinVoltage

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 20|Minimum voltage")

The minimum operating voltage for this device, in millivolts, or 0, if the voltage is unknown.

This value comes from the Minimum voltage member of the Memory Device structure in the SMBIOS information.

Model

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64)

Name for the physical element.

This property is inherited from CIM_PhysicalElement.

Name

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Name")

Label for the object. When subclassed, the property can be overridden to be a key property.

This property is inherited from CIM_ManagedSystemElement.

OtherIdentifyingInfo

Data type: string
Access type: Read-only

Additional data, beyond asset tag information, that can be used to identify a physical element. One example is bar code data associated with an element that also has an asset tag. If only bar code data is available and unique or able to be used as an element key, this property is be NULL and the bar code data is used as the class key in the tag property.

This property is inherited from CIM_PhysicalElement.

PartNumber

Data type: string
Access type: Read-only
Qualifiers: MaxLen (256)

Part number assigned by the organization responsible for producing or manufacturing the physical element.

This value comes from the Part Number member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalElement.

PositionInRow

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device Mapped Addresses|001.6")

Position of the physical memory in a row. For example, if it takes two 8-bit memory devices to form a 16-bit row, then a value of 2 (two) means that this memory is the second device—0 (zero) is an invalid value for this property.

This property is inherited from CIM_PhysicalMemory.

PoweredOn

Data type: boolean
Access type: Read-only

If TRUE, the physical element is powered on.

This property is inherited from CIM_PhysicalElement.

Removable

Data type: boolean
Access type: Read-only

If TRUE, a physical component is removable (if it is designed to be taken in and out of the physical container in which it is normally found, without impairing the function of the overall packaging). A component can still be removable if power must be "off" to perform the removal. If power can be "on" and the component removed, then the element is removable and can be hot-swapped. For example, an upgradable processor chip is removable.

This property is inherited from CIM_PhysicalComponent.

Replaceable

Data type: boolean
Access type: Read-only

If TRUE, this physical media component can be replaced with a physically different one. For example, some computer systems allow the main processor chip to be upgraded to one of a higher clock rating. In this case, the processor is said to be replaceable. All removable components are inherently replaceable.

This property is inherited from CIM_PhysicalComponent.

SerialNumber

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64)

Manufacturer-allocated number to identify the physical element.

This value comes from the Serial Number member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalElement.

SKU

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64)

Stock keeping unit number for the physical element.

This property is inherited from CIM_PhysicalElement.

SMBIOSMemoryType

Data type: uint32
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Memory_Type")

The raw SMBIOS memory type. The value of the MemoryType property is a CIM value that is mapped to the SMBIOS value.

Speed

Data type: uint32
Access type: Read-only
Qualifiers: Units ("nanoseconds")

Speed of the physical memory—in nanoseconds.

This value comes from the Speed member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalMemory.

Status

Data type: string
Access type: Read-only
Qualifiers: MaxLen (10), DisplayName ("Status")

Current status of the object. Various operational and nonoperational statuses can be defined. Operational statuses include: "OK", "Degraded", and "Pred Fail" (an element, such as a SMART-enabled hard disk drive, may be functioning properly but predicting a failure in the near future). Nonoperational statuses include: "Error", "Starting", "Stopping", and "Service". The latter, "Service", could apply during mirror-resilvering of a disk, reload of a user permissions list, or other administrative work. Not all such work is online, yet the managed element is neither "OK" nor in one of the other states.

This property is inherited from CIM_ManagedSystemElement.

The possible values are.

OK ("OK")

Error ("Error")

Degraded ("Degraded")

Unknown ("Unknown")

Pred Fail ("Pred Fail")

Starting ("Starting")

Stopping ("Stopping")

Service ("Service")

Stressed ("Stressed")

NonRecover ("NonRecover")

No Contact ("No Contact")

Lost Comm ("Lost Comm")

Tag

Data type: string
Access type: Read-only
Qualifiers: Key, MaxLen (256), Override ("Tag"), MappingStrings ("WMI")

Unique identifier for the physical memory device that is represented by an instance of Win32_PhysicalMemory. This property is inherited from CIM_PhysicalElement.

Example: "Physical Memory 1"

TotalWidth

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Memory Device|002.7"), Units ("bits")

Total width, in bits, of the physical memory, including check or error correction bits. If there are no error correction bits, the value in this property should match what is specified for the DataWidth property.

This value comes from the Total Width member of the Memory Device structure in the SMBIOS information.

This property is inherited from CIM_PhysicalMemory.

TypeDetail

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 17|Type Detail")

Type of physical memory represented.

This value comes from the Type Detail member of the Memory Device structure in the SMBIOS information.

Reserved (1)

Other (2)

Unknown (4)

Fast-paged (8)

Static column (16)

Pseudo-static (32)

RAMBUS (64)

Synchronous (128)

CMOS (256)

EDO (512)

Window DRAM (1024)

Cache DRAM (2048)

Non-volatile (4096)

Nonvolatile

Version

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64)

Version of the physical element.

This property is inherited from CIM_PhysicalElement.

Remarks

The Win32_PhysicalMemory class is derived from CIM_PhysicalMemory.

Examples

The following PowerShell code sample retrieves information regarding the physical memory of the local computer.

function get-WmiMemoryFormFactor {
param ([uint16] $char)

If ($char -ge 0 -and  $char  -le 22) {

switch ($char) {
0     {"00-Unknown"}
1     {"01-Other"}
2     {"02-SiP"}
3     {"03-DIP"}
4     {"04-ZIP"}
5     {"05-SOJ"}
6     {"06-Proprietary"}
7     {"07-SIMM"}
8     {"08-DIMM"}
9     {"09-TSOPO"}
10     {"10-PGA"}
11     {"11-RIM"}
12     {"12-SODIMM"}
13     {"13-SRIMM"}
14     {"14-SMD"}
15     {"15-SSMP"}
16     {"16-QFP"}
17     {"17-TQFP"}
18     {"18-SOIC"}
19     {"19-LCC"}
20     {"20-PLCC"}
21     {"21-FPGA"}
22     {"22-LGA"}
}
}

else {"{0} - undefined value" -f $char
}

Return
}

# Helper function to return memory Interleave  Position

function get-WmiInterleavePosition {
param ([uint32] $char)

If ($char -ge 0 -and  $char -le 2) {

switch ($char) {
0     {"00-Non-Interleaved"}
1     {"01-First Position"}
2     {"02-Second Position"}
}
}

else {"{0} - undefined value" -f $char
}

Return
}


# Helper function to return Memory Tupe
function get-WmiMemoryType {
param ([uint16] $char)

If ($char -ge 0 -and  $char  -le 20) {

switch ($char) {
0     {"00-Unknown"}
1     {"01-Other"}
2     {"02-DRAM"}
3     {"03-Synchronous DRAM"}
4     {"04-Cache DRAM"}
5     {"05-EDO"}
6     {"06-EDRAM"}
7     {"07-VRAM"}
8     {"08-SRAM"}
9     {"09-ROM"}
10     {"10-ROM"}
11     {"11-FLASH"}
12     {"12-EEPROM"}
13     {"13-FEPROM"}
14     {"14-EPROM"}
15     {"15-CDRAM"}
16     {"16-3DRAM"}
17     {"17-SDRAM"}
18     {"18-SGRAM"}
19     {"19-RDRAM"}
20     {"20-DDR"}
}

}

else {"{0} - undefined value" -f $char
}

Return
}


# Get the object
$memory = Get-WMIObject Win32_PhysicalMemory

#  Format and Print
"System has {0} memory sticks:" -f $memory.count

Foreach ($stick in $memory) {

# Do some conversions
$cap=$stick.capacity/1mb
$ff=get-WmiMemoryFormFactor($stick.FormFactor)
$ilp=get-WmiInterleavePosition($stick.InterleavePosition)
$mt=get-WMIMemoryType($stick.MemoryType)

# print details of each stick
"BankLabel            {0}"  -f $stick.banklabel
"Capacity (MB)        {0}"  -f $cap
"Caption              {0}"  -f $stick.Caption
"CreationClassName    {0}"  -f $stick.creationclassname
"DataWidth            {0}"  -f $stick.DataWidth
"Description          {0}"  -f $stick.Description
"DeviceLocator        {0}"  -f $stick.DeviceLocator
"FormFactor           {0}"  -f $ff
"HotSwappable         {0}"  -f $stick.HotSwappable
"InstallDate          {0}"  -f $stick.InstallDate
"InterleaveDataDepth  {0}"  -f $stick.InterleaveDataDepth
"InterleavePosition   {0}"  -f $ilp
"Manufacturer         {0}"  -f $stick.Manufacturer
"MemoryType           {0}"  -f $mt
"Model                {0}"  -f $stick.Model
"Name                 {0}"  -f $stick.Name
"OtherIdentifyingInfo {0}"  -f $stick.OtherIdentifyingInfo
"PartNumber           {0}"  -f $stick.PartNumber
"PositionInRow        {0}"  -f $stick.PositionInRow
"PoweredOn            {0}"  -f $stick.PoweredOn
"Removable            {0}"  -f $stick.Removable
"Replaceable          {0}"  -f $stick.Replaceable
"SerialNumber         {0}"  -f $stick.SerialNumber
"SKU                  {0}"  -f $stick.SKU 
"Speed                {0}"  -f $stick.Speed 
"Status               {0}"  -f $stick.Status
"Tag                  {0}"  -f $stick.Tag
"TotalWidth           {0}"  -f $stick.TotalWidth 
"TypeDetail           {0}"  -f $stick.TypeDetail
"Version              {0}"  -f $stick.Version
""
}
"-----"

Requirements

Requirement	Value
Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Namespace	Root\CIMV2
MOF	CIMWin32.mof
DLL	CIMWin32.dll

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Win32_PhysicalMemory class

Syntax

Members

Properties

Remarks

Examples

Requirements

See also

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