diff --git a/test/test_ops.py b/test/test_ops.py
index 722d6c29ac..95c0148335 100644
--- a/test/test_ops.py
+++ b/test/test_ops.py
@@ -207,12 +207,12 @@ class TestOps(unittest.TestCase):
     arg = (4,3,2,6)
     helper_test_op([(4,3,1,6)], lambda x: x.expand(arg), lambda x: x.expand(shape=arg))
 
-  @unittest.skip
+  @unittest.skipUnless(Device.DEFAULT != "GPU", "GPU doesn't work with convs with virtual dimensions > 2**31")
   def test_sd_big_conv(self):
     # internal shape (1, 1, 512, 62, 62, 512, 3, 3) overflows a int
-    helper_test_op([(1,512,64,64), (512,512,3,3)],
+    helper_test_op([(1,256,64,64), (512,256,3,3)],
                     lambda x,w: torch.nn.functional.conv2d(x, w),
-                    lambda x,w: x.conv2d(w), atol=1e-4)
+                    lambda x,w: x.conv2d(w), atol=1e-2)
 
   def test_large_bs_conv(self):
     # large batch size can cause OpenCL image to exceed max image height on macOS
diff --git a/tinygrad/llops/ops_gpu.py b/tinygrad/llops/ops_gpu.py
index 80cfb32518..6ccdb3385f 100644
--- a/tinygrad/llops/ops_gpu.py
+++ b/tinygrad/llops/ops_gpu.py
@@ -120,6 +120,7 @@ class GPUBuffer:
 
   def contiguous_view_constant_fold(x, name:str) -> Tuple[str, Optional[str], str]:
     if x._base_shape == (1,) and x._backing is not None:
+      # this function doesn't need a memory access
       return f"inline float get_{name}(int gid) {{ int valid = 1; int idx = gid; {x.st.expr().replace('//', '/')}; return valid ? {x._backing[0]} : 0.0;}}", None, f"get_{name}(idx);"
     else:
       return x.contiguous_view(name), f"__global const float *{name}_g", f"get_{name}({name}_g, idx);"