diff --git a/src/gallium/drivers/iris/iris_clear.c b/src/gallium/drivers/iris/iris_clear.c
index 7810920813e..6be35db8eb5 100644
--- a/src/gallium/drivers/iris/iris_clear.c
+++ b/src/gallium/drivers/iris/iris_clear.c
@@ -147,6 +147,16 @@ can_fast_clear_color(struct iris_context *ice,
          return false;
    }
 
+   /* On gfx12.0, CCS fast clears don't seem to cover the correct portion of
+    * the aux buffer when the pitch is not 512B-aligned.
+    */
+   if (devinfo->verx10 == 120 &&
+       res->surf.samples == 1 &&
+       res->surf.row_pitch_B % 512) {
+      perf_debug(&ice->dbg, "Pitch not 512B-aligned. Slow clearing surface.");
+      return false;
+   }
+
    return true;
 }
 
diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index 42289b46c32..28721c4474a 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -3485,6 +3485,17 @@ anv_can_fast_clear_color_view(struct anv_device *device,
          return false;
    }
 
+   /* On gfx12.0, CCS fast clears don't seem to cover the correct portion of
+    * the aux buffer when the pitch is not 512B-aligned.
+    */
+   if (device->info->verx10 == 120 &&
+       iview->image->planes->primary_surface.isl.samples == 1 &&
+       iview->image->planes->primary_surface.isl.row_pitch_B % 512) {
+      anv_perf_warn(VK_LOG_OBJS(&iview->image->vk.base),
+                    "Pitch not 512B-aligned. Slow clearing surface.");
+      return false;
+   }
+
    /* Disable sRGB fast-clears for non-0/1 color values on Gfx9. For texturing
     * and draw calls, HW expects the clear color to be in two different color
     * spaces after sRGB fast-clears - sRGB in the former and linear in the