diff --git a/crates/ml/src/hyperopt/adapters/dqn.rs b/crates/ml/src/hyperopt/adapters/dqn.rs
index e8bf98800..bcf736441 100644
--- a/crates/ml/src/hyperopt/adapters/dqn.rs
+++ b/crates/ml/src/hyperopt/adapters/dqn.rs
@@ -502,7 +502,7 @@ impl ParameterSpace for DQNParams {
             (0.005_f64.ln(), 0.01_f64.ln()), // 20: tau (log scale, Polyak soft update)
 
             // GPU-dynamic network sizing (1D)
-            (128.0, 512.0),     // 21: hidden_dim_base (128-512: covers RTX3050→H100 range, 1024+ is wasteful)
+            (128.0, 1024.0),    // 21: hidden_dim_base (128-1024: 4x production default, H100 has headroom at 0.7ms/step)
 
             // CQL regularization (1D)
             (0.0, 1.0),         // 22: cql_alpha (0=disabled, 0.1=mild, 1.0=full offline-RL strength)