diff --git a/comfy/ldm/wan/vae2_2.py b/comfy/ldm/wan/vae2_2.py
index c2c150e10..b9c2d1a26 100644
--- a/comfy/ldm/wan/vae2_2.py
+++ b/comfy/ldm/wan/vae2_2.py
@@ -136,7 +136,7 @@ class ResidualBlock(nn.Module):
             if in_dim != out_dim else nn.Identity())
 
     def forward(self, x, feat_cache=None, feat_idx=[0]):
-        h = self.shortcut(x)
+        old_x = x
         for layer in self.residual:
             if isinstance(layer, CausalConv3d) and feat_cache is not None:
                 idx = feat_idx[0]
@@ -156,7 +156,7 @@ class ResidualBlock(nn.Module):
                 feat_idx[0] += 1
             else:
                 x = layer(x)
-        return x + h
+        return x + self.shortcut(old_x)
 
 
 def patchify(x, patch_size):
@@ -327,7 +327,7 @@ class Down_ResidualBlock(nn.Module):
         self.downsamples = nn.Sequential(*downsamples)
 
     def forward(self, x, feat_cache=None, feat_idx=[0]):
-        x_copy = x.clone()
+        x_copy = x
         for module in self.downsamples:
             x = module(x, feat_cache, feat_idx)
 
@@ -369,7 +369,7 @@ class Up_ResidualBlock(nn.Module):
         self.upsamples = nn.Sequential(*upsamples)
 
     def forward(self, x, feat_cache=None, feat_idx=[0], first_chunk=False):
-        x_main = x.clone()
+        x_main = x
         for module in self.upsamples:
             x_main = module(x_main, feat_cache, feat_idx)
         if self.avg_shortcut is not None:
diff --git a/comfy/model_management.py b/comfy/model_management.py
index 694b4af96..dffdcfa83 100644
--- a/comfy/model_management.py
+++ b/comfy/model_management.py
@@ -557,6 +557,8 @@ WINDOWS = any(platform.win32_ver())
 EXTRA_RESERVED_VRAM = 400 * 1024 * 1024
 if WINDOWS:
     EXTRA_RESERVED_VRAM = 600 * 1024 * 1024 #Windows is higher because of the shared vram issue
+    if total_vram > (15 * 1024):  # more extra reserved vram on 16GB+ cards
+        EXTRA_RESERVED_VRAM += 100 * 1024 * 1024
 
 if args.reserve_vram is not None:
     EXTRA_RESERVED_VRAM = args.reserve_vram * 1024 * 1024 * 1024