diff --git a/comfy/sd.py b/comfy/sd.py
index e573804a5..406e83547 100644
--- a/comfy/sd.py
+++ b/comfy/sd.py
@@ -441,7 +441,7 @@ class VAE:
             sd = diffusers_convert.convert_vae_state_dict(sd)
 
         if model_management.is_amd():
-            VAE_KL_MEM_RATIO = 2.73
+            VAE_KL_MEM_RATIO = 1.3 # Conservative margin for modern ROCm 7.x, reduced from 2.73 (see PR #12685)
         else:
             VAE_KL_MEM_RATIO = 1.0