diff --git a/ldm/modules/diffusionmodules/model.py b/ldm/modules/diffusionmodules/model.py
index a6cefc82ad..970f6aad8f 100644
--- a/ldm/modules/diffusionmodules/model.py
+++ b/ldm/modules/diffusionmodules/model.py
@@ -210,10 +210,7 @@ class AttnBlock(nn.Module):
         h_ = torch.zeros_like(k, device=q.device)
 
         device_type = 'mps' if q.device.type == 'mps' else 'cuda'
-        
-        if device_type == 'mps':
-            mem_free_total = psutil.virtual_memory().available
-        else:
+        if device_type == 'cuda':
             stats = torch.cuda.memory_stats(q.device)
             mem_active = stats['active_bytes.all.current']
             mem_reserved = stats['reserved_bytes.all.current']
@@ -221,14 +218,21 @@ class AttnBlock(nn.Module):
             mem_free_torch = mem_reserved - mem_active
             mem_free_total = mem_free_cuda + mem_free_torch
 
-        tensor_size = q.shape[0] * q.shape[1] * k.shape[2] * 4
-        mem_required = tensor_size * 2.5
-        steps = 1
+            tensor_size = q.shape[0] * q.shape[1] * k.shape[2] * 4
+            mem_required = tensor_size * 2.5
+            steps = 1
 
-        if mem_required > mem_free_total:
-            steps = 2**(math.ceil(math.log(mem_required / mem_free_total, 2)))
+            if mem_required > mem_free_total:
+                steps = 2**(math.ceil(math.log(mem_required / mem_free_total, 2)))
+            
+            slice_size = q.shape[1] // steps if (q.shape[1] % steps) == 0 else q.shape[1]
 
-        slice_size = q.shape[1] // steps if (q.shape[1] % steps) == 0 else q.shape[1]
+        else:
+            if psutil.virtual_memory().available / (1024**3) < 12:
+                slice_size = 1
+            else:
+                slice_size = min(q.shape[1], math.floor(2**30 / (q.shape[0] * q.shape[1])))
+        
         for i in range(0, q.shape[1], slice_size):
             end = i + slice_size