diff --git a/server/src/wled_controller/core/live_stream.py b/server/src/wled_controller/core/live_stream.py
index 7ba5637..f420ad0 100644
--- a/server/src/wled_controller/core/live_stream.py
+++ b/server/src/wled_controller/core/live_stream.py
@@ -141,8 +141,11 @@ class ScreenCaptureLiveStream(LiveStream):
             except Exception as e:
                 logger.error(f"Capture error (display={self._capture_stream.display_index}): {e}")
 
-            # No FPS throttling - capture as fast as frames are available
-            # But sleep briefly during idle periods to avoid burning CPU
+            # Throttle to target FPS
+            elapsed = time.time() - loop_start
+            remaining = frame_time - elapsed
+            if remaining > 0:
+                time.sleep(remaining)
 
 
 class ProcessedLiveStream(LiveStream):
@@ -209,18 +212,17 @@ class ProcessedLiveStream(LiveStream):
         # processed by a consumer), so the 3rd slot is always safe to reuse.
         _ring: List[Optional[np.ndarray]] = [None, None, None]
         _ring_idx = 0
+        frame_time = 1.0 / self._source.target_fps if self._source.target_fps > 0 else 1.0
 
         while self._running:
-            source_frame = self._source.get_latest_frame()
-            if source_frame is None:
-                # Small sleep when waiting for frames to avoid CPU spinning
-                time.sleep(0.001)
-                continue
+            loop_start = time.time()
 
-            # Identity cache: Skip processing duplicate frames to save CPU
-            # (Compare object identity to detect when capture engine returns same frame)
-            if source_frame is cached_source_frame:
-                time.sleep(0.001)
+            source_frame = self._source.get_latest_frame()
+            if source_frame is None or source_frame is cached_source_frame:
+                # Sleep until next frame is expected
+                elapsed = time.time() - loop_start
+                remaining = frame_time - elapsed
+                time.sleep(max(remaining, 0.001))
                 continue
 
             cached_source_frame = source_frame
diff --git a/server/src/wled_controller/core/processor_manager.py b/server/src/wled_controller/core/processor_manager.py
index 7ebe11e..8f35d17 100644
--- a/server/src/wled_controller/core/processor_manager.py
+++ b/server/src/wled_controller/core/processor_manager.py
@@ -859,8 +859,11 @@ class ProcessorManager:
                     state.metrics.last_error = str(e)
                     logger.error(f"Processing error for target {target_id}: {e}", exc_info=True)
 
-                # No FPS control - process frames as fast as they arrive (match test behavior)
-                pass
+                # Throttle to target FPS
+                elapsed = time.time() - loop_start
+                remaining = frame_time - elapsed
+                if remaining > 0:
+                    await asyncio.sleep(remaining)
 
         except asyncio.CancelledError:
             logger.info(f"Processing loop cancelled for target {target_id}")
@@ -1503,8 +1506,11 @@ class ProcessorManager:
                     state.metrics.last_error = str(e)
                     logger.error(f"KC processing error for {target_id}: {e}", exc_info=True)
 
-                # No FPS control - process frames as fast as they arrive (match test behavior)
-                pass
+                # Throttle to target FPS
+                elapsed = time.time() - loop_start
+                remaining = frame_time - elapsed
+                if remaining > 0:
+                    await asyncio.sleep(remaining)
 
         except asyncio.CancelledError:
             logger.info(f"KC processing loop cancelled for target {target_id}")