diff --git a/lact-daemon/src/server/handler.rs b/lact-daemon/src/server/handler.rs
index d1785bd..a9c71ff 100644
--- a/lact-daemon/src/server/handler.rs
+++ b/lact-daemon/src/server/handler.rs
@@ -173,16 +173,22 @@ impl<'a> Handler {
         }
     }
 
-    pub fn set_power_limit(&'a self, id: &str, limit: f64) -> anyhow::Result<()> {
-        self.controller_by_id(id)?
+    pub fn set_power_cap(&'a self, id: &str, maybe_cap: Option<f64>) -> anyhow::Result<()> {
+        let hw_mon = self
+            .controller_by_id(id)?
             .handle
             .hw_monitors
             .first()
-            .context("GPU has no hardware monitor")?
-            .set_power_cap(limit)?;
+            .context("GPU has no hardware monitor")?;
+
+        let cap = match maybe_cap {
+            Some(cap) => cap,
+            None => hw_mon.get_power_cap_default()?,
+        };
+        hw_mon.set_power_cap(cap)?;
 
         self.edit_gpu_config(id.to_owned(), |gpu_config| {
-            gpu_config.power_cap = Some(limit);
+            gpu_config.power_cap = maybe_cap;
         })
     }
 
diff --git a/lact-daemon/src/server/mod.rs b/lact-daemon/src/server/mod.rs
index bf6b9fa..bc447ec 100644
--- a/lact-daemon/src/server/mod.rs
+++ b/lact-daemon/src/server/mod.rs
@@ -86,7 +86,7 @@ async fn handle_request<'a>(request: Request<'a>, handler: &'a Handler) -> anyho
         Request::SetFanControl { id, enabled } => {
             ok_response(handler.set_fan_control(id, enabled).await?)
         }
-        Request::SetPowerLimit { id, limit } => ok_response(handler.set_power_limit(id, limit)?),
+        Request::SetPowerCap { id, cap } => ok_response(handler.set_power_cap(id, cap)?),
     }
 }
 
diff --git a/lact-schema/src/request.rs b/lact-schema/src/request.rs
index 96e2573..4129c82 100644
--- a/lact-schema/src/request.rs
+++ b/lact-schema/src/request.rs
@@ -8,5 +8,5 @@ pub enum Request<'a> {
     DeviceInfo { id: &'a str },
     DeviceStats { id: &'a str },
     SetFanControl { id: &'a str, enabled: bool },
-    SetPowerLimit { id: &'a str, limit: f64 },
+    SetPowerCap { id: &'a str, cap: Option<f64> },
 }