PRTG Manual: Detailed System Requirements

This section lists different aspects of system requirements for PRTG. Please consider these requirements in order to avoid issues while network monitoring.

Supported Operating Systems

The 32-bit and 64-bit versions of the following operating systems are officially supported for PRTG Core Service and Probe Service (Intel x86/x64 architectures only):

  • Microsoft Windows 7
  • Microsoft Windows 8
  • Microsoft Windows Server 2008 R2 and Windows Server 2008 R2 SP1
  • Microsoft Windows Server 2012**
  • Microsoft Windows Server 2012 R2**
  • Microsoft Windows Server 2003 SP1 or later
  • Microsoft Windows Vista*
  • Microsoft Windows Server 2008*

* For performance reasons, we do not recommend using Windows Vista or Windows Server 2008 R1, especially when monitoring via Windows Management Instrumentation (WMI). Using these operating systems, you will only be able to add a limited number of WMI sensors! For detailed information, please see More section below. If you need to use Windows Server 2008 R1, we strongly recommend installing Service Pack 2 (SP2).

** Windows Server 2012 in Core mode and the Minimal Server Interface are not officially supported.

The version (32-bit or 64-bit) of the PRTG Core Server depends on the version of your operating system. The 64-bit version of the PRTG Core Server will be installed if

  • the operating system is a 64-bit Windows system, and
  • the system provides 6GB RAM or more.

Otherwise the 32-bit version of the PRTG Core Server will be installed.

We recommend you to provide Microsoft .NET Framework versions 3.5 and 4.0 (with latest updates) on all systems running a PRTG probe. Note: Version 4.0 is imperatively needed for monitoring VMware and XenServer virtual environments.

More details: Some sensor types need the Microsoft .NET Framework to be installed on the computer running the PRTG probe. This is either on the local system (on every node, if on a cluster probe), or on the system running a remote probe. Depending on the sensor type, the required versions are 2.0, 3.0, or 4.0. Note: According to the Microsoft website, .NET version 3.5 contains versions 2.0 SP1 and 3.0 SP1. Version 4.0 is not downward compatible, but must be installed side-by-side to older version(s), if required.

For best performance of hybrid sensors using Windows Performance Counters and Windows Management Instrumentation (WMI), we recommend Windows 2008 R2 or higher on the computer running the PRTG probe: This is either on the local system (on every node, if on a cluster probe), or on the system running a remote probe.

Hardware Requirements

Hardware requirements for PRTG Core Service and Probe Service mainly depend on the sensor types and intervals used. The following values are provided as reference for common usage scenarios of PRTG (based on a default sensor interval of 60 seconds).

  • CPU
    An average PC built in 2007 can easily monitor 1,000 sensors (see sensor type specific notes below). PRTG supports native x86 architectures.
  • RAM memory
    Minimum requirement: 1024 MB RAM. You will need about 150 KB of RAM per sensor.
  • Hard Disk Drive
    You will need about 200 KB of disk space per sensor per day (for sensors with 60 second interval).
  • Internet connection
    An internet connection is required for license activation (via HTTP or email).
  • Stable network connection for remote probes
    Remote probes require a stable network connection between the PRTG core server and the remote probe. Unstable connections, for example via 3G, might work but it could be possible that you lose monitoring data if the connection is non-reliable.

There are also non-hardware dependent limitations for some sensor types, for example, WMI and SNMP V3 sensors. These limitations can be overcome by distributing the sensors across multiple remote probes. If you plan installations with more than 500 to 1,000 sensors, or more than 10 Packet Sniffer or xFlow (NetFlow, sFlow) sensors, please consult the site planner tool linked in the More section below.

Sample Configurations

The sample configurations in the table below will give you an overview of the hardware requirements for PRTG, based on your configuration.


Large Installation A

Large Installation B

Netbook Installation


DELL Alienware

DELL PowerEdge 2900 III

DELL Inspiron Mini 10


Intel Core2 Quad-Core
2.6 GHz

Intel Xeon Quad-Core
1.87 GHz

Intel Atom Z520
1.33 GHz


8 GB

16 GB

1 GB

Operating System

Windows 7 64-Bit

Windows 2003 64-Bit

Windows XP 32-Bit


20,000 SNMP
100 Other

20,000 SNMP

600 SNMP
750 WMI

Installation Corresponds To

400 switches à 48 ports

400 switches à 48 ports

24 switches à 25 ports
+ 30 Windows server

Scanning Interval

1 minute

1 minute

5 minutes

Number of Probes




Average CPU Load
While Monitoring*

3 %

20 %

35 %

Average CPU Load
While Generating Reports*

20 %

30 %

85 %

Average Memory Used

3 GB

3.5 GB

260 MB

Average Data Written to Disk Per Year

800 GB

800 GB

55 GB

Average Network Load

80 kbit/s

550 kbit/s

150 kbit/s

* CPU load is higher while users are accessing the web interface.

Running PRTG on Virtual Machines

PRTG core server as well as PRTG probe can be run on virtualized platforms. The following platforms were tested successfully:

Virtual Host Technology

Client OS

VMware ESX/ESXi versions 3.5, 4.0, or 5.0

Windows XP, Windows 2003 SP1 or later (32/64 bit), Windows Vista, Windows 7 (32/64 bit), Windows 2008 (32/64 bit), Windows 8 (32/64 bit), Windows 2012 (32/64 bit)

VMware Server 2.0

Windows XP, Windows 2003 SP1 or later(32/64 bit), Windows 2008, Windows 8 (32/64 bit), Windows 2012 (32/64 bit)

XEN Server 5.0

Windows XP, Windows 2003 SP1 or later (32/64 bit), Windows 2008, Windows 8 (32/64 bit), Windows 2012 (32/64 bit)

Parallels Virtuozzo Containers

Windows 2003 Server SP1 or later (32/64 bit), Windows 2008 Server, Windows 8 (32/64 bit), Windows 2012 (32/64 bit)

Cloud Hosting Platforms (Amazon EC2, TheRackspaceCloud, and others)

Windows Server 2003 SP1 or later, Windows Server 2008, Windows 8 (32/64 bit), Windows 2012 (32/64 bit)

Important notice: We recommend using a dedicated physical machine to run both the PRTG core server and PRTG remote probes. If you run PRTG on a virtual machine, we strongly recommend to stay below 2,000 sensors for performance reasons. Unfortunately, we cannot offer technical support regarding performance and stability problems for PRTG installations on virtual machines that run with more than 5,000 sensors. In this case, please migrate PRTG to one or more, preferably physical, machines.

Note: When running PRTG on a virtual machine, do not use dynamic resource allocation, but please make sure that full resources are available to the virtual machine at any time. In our experience, dynamic resource allocation is not working efficiently for a monitoring software and can therefore lead to massive performance issues.

Please see also section More regarding running PRTG on VMware.

Web Browser Requirements

The following browsers are officially supported by the PRTG web interface (in order of performance and reliability):

  • Google Chrome 34 or later (recommended)
  • Mozilla Firefox 28 or later
  • Microsoft Internet Explorer 10 or 11

Note: Deprecated Internet Explorer versions as well as mobile browsers might not be able to display the full featured Ajax web interface. Using these browsers, you can access the feature-limited Mobile Web GUI, which does not require CSS or Javascript capability.

PRTG's web interface makes heavy use of Javascript and AJAX. We found that for some functions Chrome is up to 10 times faster than Internet Explorer, and 3 to 5 times faster than Firefox.

Screen Resolution

A screen resolution of at least 1024x768 pixels is sufficient for most functions of PRTG. However, we recommend a screen resolution of 1200x800 or higher.

Requirements for Monitored Devices

  • SNMP monitoring
    The monitored device(s) must be equipped with SNMP Version 1, 2c, or 3 (i.e., an SNMP-compatible software must be installed on the device). SNMP must be enabled on the device and the machine running PRTG must be granted access to the SNMP interface.
  • Windows/WMI monitoring
    In order to use WMI (Windows Management Instrumentation) monitoring, you will need a Windows network. For client PCs monitored with WMI, only the operating systems as given above are officially supported. Windows 2000 is not officially supported. Please do not use Windows Vista or Windows 2008 R1 for WMI monitoring (they both have WMI performance issues). Windows XP is not officially supported and might not work with sensors which use Remote Powershell.
  • xFlow (IPFIX, NetFlow, sFlow) monitoring
    The device must be configured to send NetFlow data packets (NetFlow version 5 or 9; IPFIX is the successor protocol of NetFlow 9) or sFlow packets (version 5) to the machine running the PRTG probe.
  • Packet Sniffer monitoring
    Only data packets passing the local machine's network card can be analyzed. Switches with so-called 'monitoring ports' are necessary for network-wide monitoring in switched networks.
  • Other sensor types
    Depending on the specific sensor type, you can find requirements (for example, modules, components, device configurations) which may have to be fulfilled in the corresponding manual section, as well as partly when adding the sensor to a device.

Requirements for the Enterprise Console

The optional PRTG Enterprise Console runs under all Windows versions XP or later. It has a built-in webkit browser engine and requires no specific browser installed on the system. See also section Enterprise Console—Requirements for Connections to PRTG Web Server(s).

Requirements for Mobile Web GUI

The feature-limited mobile web interface is optimized for low bandwidth and mobile access. It has been designed for and tested with iOS (iPhone, iPad), Android, Blackberry, Windows Mobile, and also deprecated Internet Explorer versions.

Requirements for Smartphones

The optional smartphone apps for iOS devices require iOS version 6 or later and PRTG v12 or later. For Android devices, the app "PRTG for Android" requires Android OS 4.0 or later (version 4.1 or later recommended), as well as PRTG Network Monitor 13.1 or later. For more information, please see Smartphone Apps. The 'Mobile Web GUI' interface can be used on most phones with a browser. We successfully tested it on Symbian, BlackBerry, Windows, Android, and iOS devices.


Paessler Blog: Don't Use Windows Vista And Windows 2008 R1 for Network Monitoring via WMI!

Paessler Website: Paessler PRTG Site Planner Tool

Knowledge Base: How can I speed up PRTG—especially for large installations?

Knowledge Base: My WMI sensors don't work. What can I do?

Knowledge Base: Frequent Questions about xFlow, Packet Sniffing, Traffic Monitoring and Cisco

Knowledge Base: My SNMP sensors don't work. What can I do?

Knowledge Base: Checklist for Running PRTG on VMware


Introduction Topics