diff --git a/conf/cassandra-env.ps1 b/conf/cassandra-env.ps1
index 8dddc2db84..8b0b775196 100644
--- a/conf/cassandra-env.ps1
+++ b/conf/cassandra-env.ps1
@@ -337,6 +337,26 @@ Function SetCassandraEnvironment
     # Add sigar env - see Cassandra-7838
     $env:JVM_OPTS = "$env:JVM_OPTS -Djava.library.path=$env:CASSANDRA_HOME\lib\sigar-bin"
 
+    # Confirm we're on high performance power plan, warn if not
+    # Change to $true to suppress this warning
+    $suppressPowerWarning = $false
+    if (!$suppressPowerWarning)
+    {
+        $currentProfile = powercfg /GETACTIVESCHEME
+        if (!$currentProfile.Contains("High performance"))
+        {
+            echo "*---------------------------------------------------------------------*"
+            echo "*---------------------------------------------------------------------*"
+            echo ""
+            echo "    WARNING! Detected a power profile other than High Performance."
+            echo "    Performance of this node will suffer."
+            echo "    Modify conf\cassandra.env.ps1 to suppress this warning."
+            echo ""
+            echo "*---------------------------------------------------------------------*"
+            echo "*---------------------------------------------------------------------*"
+        }
+    }
+
     # add the jamm javaagent
     if (($env:JVM_VENDOR -ne "OpenJDK") -or ($env:JVM_VERSION.CompareTo("1.6.0") -eq 1) -or
         (($env:JVM_VERSION -eq "1.6.0") -and ($env:JVM_PATCH_VERSION.CompareTo("22") -eq 1)))