diff --git a/app/igneum-app/src/ember.rs b/app/igneum-app/src/ember.rs
index c1cb4db8..0dfbd87a 100644
--- a/app/igneum-app/src/ember.rs
+++ b/app/igneum-app/src/ember.rs
@@ -774,8 +774,13 @@ impl Run {
         let power_changed = (step.watts - before_w).abs() >= 1.5;
         if step.point.clock_mhz > 0 || step.point.mem_mhz > 0 || !power_changed {
             rb.acked && power_ok
+        } else if rb.limit_w <= 0.0 {
+            // a card with no limit readback at all (AMD through ADLX reports an offset, never watts; run 6 on
+            // 6 October 2026 aborted the 9070 XT's ladder at its first step on "card reports 0 W"): the
+            // acknowledgement is the proof
+            rb.acked
         } else {
-            rb.limit_w > 0.0 && power_ok
+            power_ok
         }
     }
 
@@ -976,6 +981,17 @@ mod tests {
         assert!(Plan::full(&Limits::default(), Point::default(), 1.0).is_empty());
     }
 
+    #[test]
+    fn a_power_step_on_a_card_without_a_limit_readback_is_applied_on_the_acknowledgement() {
+        // AMD through ADLX: the limit reads back as an offset, never watts (run 6, 6 October 2026)
+        let step = Step { point: Point { clock_mhz: 0, power_pct: 90, mem_mhz: 0 }, watts: 90.0, kind: Kind::Power };
+        assert!(Run::applied(&step, Readback { limit_w: 0.0, acked: true }, 100.0));
+        assert!(!Run::applied(&step, Readback { limit_w: 0.0, acked: false }, 100.0));
+        // NVIDIA: the watts must read back
+        assert!(!Run::applied(&step, Readback { limit_w: 100.0, acked: true }, 100.0));
+        assert!(Run::applied(&step, Readback { limit_w: 90.0, acked: false }, 100.0));
+    }
+
     #[test]
     fn limits_never_exceed_the_vendor_or_undercut_the_floor() {
         let l = l5090();