diff --git a/hosts/FredOS-Gaming.nix b/hosts/FredOS-Gaming.nix
index 9db3d26..65e872f 100644
--- a/hosts/FredOS-Gaming.nix
+++ b/hosts/FredOS-Gaming.nix
@@ -59,7 +59,15 @@
     boot.initrd.systemd.enable = true;
     # Early-console mode hint only (Hyprland sets the real mode at runtime via
     # the desc-matched rule below). Connector name has drifted DP-2/DP-3.
-    boot.kernelParams = [ "video=DP-3:3440x1440@180" ];
+    # B650M DS3H's ACPI claims the SMBus, hiding the Trident Z5 RAM from
+    # OpenRGB; `lax` lets i2c-piix4 take it.
+    boot.kernelParams = [ "video=DP-3:3440x1440@180" "acpi_enforce_resources=lax" ];
+
+    # RAM/mobo RGB control (i2c-piix4 + i2c-dev, udev rules).
+    services.hardware.openrgb = {
+      enable = true;
+      motherboard = "amd";
+    };
 
     # LAN has no IPv6 route — AAAA lookups succeed but connect fails, which
     # made NetworkManager's connectivity probe report "limited" at boot