diff --git a/frigate/test/test_gpu_stats.py b/frigate/test/test_gpu_stats.py
index 2604c4002..bfeebf83c 100644
--- a/frigate/test/test_gpu_stats.py
+++ b/frigate/test/test_gpu_stats.py
@@ -7,8 +7,6 @@ from frigate.util.services import get_amd_gpu_stats, get_intel_gpu_stats
 class TestGpuStats(unittest.TestCase):
     def setUp(self):
         self.amd_results = "Unknown Radeon card. <= R500 won't work, new cards might.\nDumping to -, line limit 1.\n1664070990.607556: bus 10, gpu 4.17%, ee 0.00%, vgt 0.00%, ta 0.00%, tc 0.00%, sx 0.00%, sh 0.00%, spi 0.83%, smx 0.00%, cr 0.00%, sc 0.00%, pa 0.00%, db 0.00%, cb 0.00%, vram 60.37% 294.04mb, gtt 0.33% 52.21mb, mclk 100.00% 1.800ghz, sclk 26.65% 0.533ghz\n"
-        self.intel_results = """{"period":{"duration":1.194033,"unit":"ms"},"frequency":{"requested":0.000000,"actual":0.000000,"unit":"MHz"},"interrupts":{"count":3349.991164,"unit":"irq/s"},"rc6":{"value":47.844741,"unit":"%"},"engines":{"Render/3D/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"},"Blitter/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"},"Video/0":{"busy":4.533124,"sema":0.000000,"wait":0.000000,"unit":"%"},"Video/1":{"busy":6.194385,"sema":0.000000,"wait":0.000000,"unit":"%"},"VideoEnhance/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"}}},{"period":{"duration":1.189291,"unit":"ms"},"frequency":{"requested":0.000000,"actual":0.000000,"unit":"MHz"},"interrupts":{"count":0.000000,"unit":"irq/s"},"rc6":{"value":100.000000,"unit":"%"},"engines":{"Render/3D/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"},"Blitter/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"},"Video/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"},"Video/1":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"},"VideoEnhance/0":{"busy":0.000000,"sema":0.000000,"wait":0.000000,"unit":"%"}}}"""
-        self.nvidia_results = "name, utilization.gpu [%], memory.used [MiB], memory.total [MiB]\nNVIDIA GeForce RTX 3050, 42 %, 5036 MiB, 8192 MiB\n"
 
     @patch("subprocess.run")
     def test_amd_gpu_stats(self, sp):
@@ -19,32 +17,73 @@ class TestGpuStats(unittest.TestCase):
         amd_stats = get_amd_gpu_stats()
         assert amd_stats == {"gpu": "4.17%", "mem": "60.37%"}
 
-    # @patch("subprocess.run")
-    # def test_nvidia_gpu_stats(self, sp):
-    #    process = MagicMock()
-    #    process.returncode = 0
-    #    process.stdout = self.nvidia_results
-    #    sp.return_value = process
-    #    nvidia_stats = get_nvidia_gpu_stats()
-    #    assert nvidia_stats == {
-    #        "name": "NVIDIA GeForce RTX 3050",
-    #        "gpu": "42 %",
-    #        "mem": "61.5 %",
-    #    }
+    @patch("frigate.util.services.time.sleep")
+    @patch("frigate.util.services.time.monotonic")
+    @patch("frigate.util.services._read_intel_drm_fdinfo")
+    def test_intel_gpu_stats_fdinfo(self, read_fdinfo, monotonic, sleep):
+        # 1 second of wall clock between snapshots
+        monotonic.side_effect = [0.0, 1.0]
 
-    @patch("subprocess.run")
-    def test_intel_gpu_stats(self, sp):
-        process = MagicMock()
-        process.returncode = 124
-        process.stdout = self.intel_results
-        sp.return_value = process
-        intel_stats = get_intel_gpu_stats(False)
-        # rc6 values: 47.844741 and 100.0 → avg 73.92 → gpu = 100 - 73.92 = 26.08%
-        # Render/3D/0: 0.0 and 0.0 → enc = 0.0%
-        # Video/0: 4.533124 and 0.0 → dec = 2.27%
-        assert intel_stats == {
-            "gpu": "26.08%",
-            "mem": "-%",
-            "compute": "0.0%",
-            "dec": "2.27%",
+        # Two i915 clients on the same iGPU. Engine values are cumulative ns;
+        # we'll arrange deltas of:
+        #   client A (pid 100): render +200_000_000 ns (20%), video +500_000_000 ns (50%)
+        #   client B (pid 200): compute +100_000_000 ns (10%)
+        # Combined engine totals → render 20%, compute 10%, video 50%
+        # → "compute" = render + compute = 30%
+        # → "dec" = video = 50%
+        # → "gpu" = max(30, 50, 0, 0) = 50%
+        snapshot_a = {
+            ("0000:00:02.0", "1", "100"): {
+                "driver": "i915",
+                "pid": "100",
+                "engines": {
+                    "render": (1_000_000_000, 0),
+                    "video": (5_000_000_000, 0),
+                    "compute": (0, 0),
+                },
+            },
+            ("0000:00:02.0", "2", "200"): {
+                "driver": "i915",
+                "pid": "200",
+                "engines": {
+                    "render": (0, 0),
+                    "compute": (2_000_000_000, 0),
+                },
+            },
         }
+        snapshot_b = {
+            ("0000:00:02.0", "1", "100"): {
+                "driver": "i915",
+                "pid": "100",
+                "engines": {
+                    "render": (1_200_000_000, 0),
+                    "video": (5_500_000_000, 0),
+                    "compute": (0, 0),
+                },
+            },
+            ("0000:00:02.0", "2", "200"): {
+                "driver": "i915",
+                "pid": "200",
+                "engines": {
+                    "render": (0, 0),
+                    "compute": (2_100_000_000, 0),
+                },
+            },
+        }
+        read_fdinfo.side_effect = [snapshot_a, snapshot_b]
+
+        intel_stats = get_intel_gpu_stats(None)
+
+        sleep.assert_called_once()
+        assert intel_stats == {
+            "gpu": "50.0%",
+            "mem": "-%",
+            "compute": "30.0%",
+            "dec": "50.0%",
+            "clients": {"100": "70.0%", "200": "10.0%"},
+        }
+
+    @patch("frigate.util.services._read_intel_drm_fdinfo")
+    def test_intel_gpu_stats_no_clients(self, read_fdinfo):
+        read_fdinfo.return_value = {}
+        assert get_intel_gpu_stats(None) is None