diff --git a/hosts/desktop/hardware-configuration.nix b/hosts/desktop/hardware-configuration.nix
index a68e205..a052abc 100644
--- a/hosts/desktop/hardware-configuration.nix
+++ b/hosts/desktop/hardware-configuration.nix
@@ -119,4 +119,5 @@
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
   # high-resolution display
   hardware.video.hidpi.enable = lib.mkDefault true;
+  powerManagement.powertop.enable = true;
 }
diff --git a/hosts/laptop/hardware-configuration.nix b/hosts/laptop/hardware-configuration.nix
index 4e78ee1..89ee11f 100644
--- a/hosts/laptop/hardware-configuration.nix
+++ b/hosts/laptop/hardware-configuration.nix
@@ -123,4 +123,8 @@
   hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
   # high-resolution display
   hardware.video.hidpi.enable = lib.mkDefault true;
+  powerManagement = {
+    cpuFreqGovernor = lib.mkDefault "powersave";
+    powertop.enable = true;    
+  };
 }
diff --git a/hosts/nas/hardware-configuration.nix b/hosts/nas/hardware-configuration.nix
index 51ad249..099c59f 100644
--- a/hosts/nas/hardware-configuration.nix
+++ b/hosts/nas/hardware-configuration.nix
@@ -33,7 +33,6 @@
       keyFile = "/root/NASKeyfile";
     };
   };
-
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
   boot.tmpOnTmpfs = true;
@@ -140,6 +139,14 @@
 #
 #    nameservers = [ "9.9.9.9" "2620:fe::fe" ];
   };
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
   hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+  powerManagement = {
+    cpuFreqGovernor = lib.mkDefault "powersave";
+    powertop.enable = true;
+    powerUpCommands = ''
+      ${pkgs.hdparm}/sbin/hdparm -B 127 -S 120 /dev/disk/by-uuid/57e6446d-faca-4b67-9063-e8d9afb80088
+      ${pkgs.hdparm}/sbin/hdparm -B 127 -S 120 /dev/disk/by-uuid/b9edc489-ac37-4b28-981d-442722df7ae2
+    '';
+  };
+  
 }