many performance optimizations

modules/sys/hw/gpu/amd.nix

@@ -6,6 +6,7 @@
   nixpkgs.config.rocmSupport = true;
   hardware = {
     amdgpu = {
+      overdrive.enable = true;
       opencl.enable = true;
       initrd.enable = true;
       zluda.enable = true;

modules/sys/hw/gpu/intel.nix

@@ -2,20 +2,24 @@
 {
   boot.kernelParams = [ "i915.enable_guc=3" ];
   # Graphics
-  hardware.enableRedistributableFirmware = true;
-  hardware.graphics = {
-    enable = true;
-    enable32Bit = true;
-    extraPackages = with pkgs; [
-      # Required for modern Intel GPUs (Xe iGPU and ARC)
-      intel-media-driver     # VA-API (iHD) userspace
-      vpl-gpu-rt             # oneVPL (QSV) runtime
+  hardware = {
+    enableRedistributableFirmware = true;
+    intel-gpu-tools.enable = true;
+    graphics = {
+      enable = true;
+      enable32Bit = true;
+      extraPackages = with pkgs; [
+        # Required for modern Intel GPUs (Xe iGPU and ARC)
+        intel-media-driver     # VA-API (iHD) userspace
+        vpl-gpu-rt             # oneVPL (QSV) runtime
 
-      # Optional (compute / tooling):
-      intel-compute-runtime  # OpenCL (NEO) + Level Zero for Arc/Xe
-      # NOTE: 'intel-ocl' also exists as a legacy package; not recommended for Arc/Xe.
-      libvdpau-va-gl       # Only if you must run VDPAU-only apps
-      vkbasalt
-    ];
+        # Optional (compute / tooling):
+        intel-compute-runtime  # OpenCL (NEO) + Level Zero for Arc/Xe
+        # NOTE: 'intel-ocl' also exists as a legacy package; not recommended for Arc/Xe.
+        libvdpau-va-gl       # Only if you must run VDPAU-only apps
+        vkbasalt
+      ];
+    };
   };
-}
+  virtualisation.kvmgt.enable = true;
+}