diff --git a/docker/frontend/src/engine/superRes.ts b/docker/frontend/src/engine/superRes.ts
index 4df9e35..2652241 100644
--- a/docker/frontend/src/engine/superRes.ts
+++ b/docker/frontend/src/engine/superRes.ts
@@ -51,6 +51,9 @@ function load(): Promise<Loaded> {
       ort.env.wasm.numThreads = self.crossOriginIsolated
         ? Math.min(8, navigator.hardwareConcurrency || 1)
         : 1;
+      // A laptop with two GPUs would otherwise hand this to the one built into
+      // the processor. The model is the export, so ask for the fast one.
+      ort.env.webgpu.powerPreference = 'high-performance';
       const session = await ort.InferenceSession.create(MODEL_URL, { executionProviders: ['webgpu'] }).catch(() =>
         ort.InferenceSession.create(MODEL_URL, { executionProviders: ['wasm'] })
       );