diff --git a/machines/mimir/configuration.nix b/machines/mimir/configuration.nix
index 4adbdbb..c5b170c 100644
--- a/machines/mimir/configuration.nix
+++ b/machines/mimir/configuration.nix
@@ -108,6 +108,10 @@
     "miniflux"
   ];
 
+  powerManagement = {
+    cpuFreqGovernor = "ondemand";
+  };
+
   systemd.network = {
     enable = true;
 
diff --git a/machines/mimir/hardware-configuration.nix b/machines/mimir/hardware-configuration.nix
index 9b7bcf2..f8d3d94 100644
--- a/machines/mimir/hardware-configuration.nix
+++ b/machines/mimir/hardware-configuration.nix
@@ -1,19 +1,11 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, pkgs, ... }:
-
-{
-  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" ];
+{ config, pkgs, ... }: {
+  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" ];
   boot.initrd.kernelModules = [ "dm-snapshot" ];
   boot.kernelModules = [ "kvm-amd" "apple-mfi-fastcharge" "zenpower" ];
+  boot.kernelParams = [ "amd_pstate.shared_mem=1" ];
   boot.extraModulePackages = [ ] ++
     (with config.boot.kernelPackages; [ rtl88x2bu zenpower ]);
 
-  boot.extraModprobeConfig = ''
-    options amd-pstate shared_mem=true
-  '';
-
   fileSystems."/" = {
     device = "/dev/disk/by-label/nixos";
     fsType = "ext4";