powercfg.exe

By monter , 1 March 2026 
C:\Users\marbr>where powercfg
C:\Windows\System32\powercfg.exe

Here’s a safe and complete PowerShell method to set your Windows system to maximum performance mode.
This works on Windows 10 and Windows 11.

Enable and Select “Ultimate Performance” Power Plan

# Run PowerShell as Administrator before executing this script

try {
    # Enable the Ultimate Performance power plan (if not already available)
    powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61

    # Set the Ultimate Performance plan as active
    powercfg -setactive e9a42b02-d5df-448d-aa00-03f14749eb61

    Write-Host "Ultimate Performance mode enabled and activated." -ForegroundColor Green
}
catch {
    Write-Host "Error: $($_.Exception.Message)" -ForegroundColor Red
}

Set “High Performance” Plan

# Run PowerShell as Administrator

try {
    # Get the High Performance plan GUID
    $plan = powercfg -list | Select-String "High performance" | ForEach-Object {
        ($_ -split '\s+')[3]
    }

    if ($plan) {
        powercfg -setactive $plan
        Write-Host "High Performance mode activated." -ForegroundColor Green
    }
    else {
        Write-Host "High Performance plan not found." -ForegroundColor Yellow
    }
}
catch {
    Write-Host "Error: $($_.Exception.Message)" -ForegroundColor Red
}

 

Extra Tweaks for Max Performance
After enabling the plan, you can also:

Disable sleep:

    powercfg -change standby-timeout-ac 0

Prevent display from turning off:

powercfg -change monitor-timeout-ac 0

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