I'm looking for a plugin to check graphics card on hosts

[log1c]

Seems like the NSClient is not configured correctly to accept the connection from the master.

Either configure the NSclient or use the Icinga Agent to run the PowerShell script.

Here is a small how to on configuring a PowerShell check command that can be used to run on the Agent:

Windows PowerShell Checks with Icinga2

Author: @GordonCole Revision: v0.1 Tested with: Icinga 2 v2.6.3-1 Icinga Web 2 v2.4.1 Windows Server 2012 R2 Introduction A vanilla Windows Icinga2 installation provides access to a number of standard server health and performance metrics. For example hard disk space, CPU, free RAM, or accessing the value of a Windows Performance Counter. Each of these is metrics is measured using a “check”. These are programs called by the main Icinga2 service. Users may write their own “checks”, as lon…