diff --git a/driver/device_implicit_gemm_convolution_2_chwn_cyxk_khwn.hpp b/driver/device_implicit_gemm_convolution_2_chwn_cyxk_khwn.hpp
index 8bd57049e2..1bf7921abe 100644
--- a/driver/device_implicit_gemm_convolution_2_chwn_cyxk_khwn.hpp
+++ b/driver/device_implicit_gemm_convolution_2_chwn_cyxk_khwn.hpp
@@ -191,7 +191,7 @@ void device_implicit_gemm_convolution_2_chwn_cyxk_khwn(InDesc,
     constexpr index_t WeiBlockCopyDataPerRead = 4;
 
     constexpr index_t BlockSize = 256;
-#elif 0
+#elif 1
     // 1x1, 14x14, Pascal, enable lds_double_buffer, disable register double buffer
     constexpr index_t BPerBlock = 64;
     constexpr index_t KPerBlock = 128;
@@ -216,9 +216,10 @@ void device_implicit_gemm_convolution_2_chwn_cyxk_khwn(InDesc,
 
     constexpr index_t InBlockCopyDataPerRead  = 4;
     constexpr index_t WeiBlockCopyDataPerRead = 4;
+    constexpr index_t OutThreadCopyDataPerWrite = 4;
 
     constexpr index_t BlockSize = 128;
-#elif 1
+#elif 0
     // 1x1, 14x14, Vega 20, enable lds_double_buffer, disable register_double_buffer
     constexpr index_t BPerBlock = 128;
     constexpr index_t KPerBlock = 128;
@@ -243,7 +244,6 @@ void device_implicit_gemm_convolution_2_chwn_cyxk_khwn(InDesc,
 
     constexpr index_t InBlockCopyDataPerRead  = 4;
     constexpr index_t WeiBlockCopyDataPerRead = 4;
-
     constexpr index_t OutThreadCopyDataPerWrite = 4;
 
     constexpr index_t BlockSize = 256;
diff --git a/src/include/gridwise_convolution_implicit_gemm_v1_chwn_cyxk_khwn.hip.hpp b/src/include/gridwise_convolution_implicit_gemm_v1_chwn_cyxk_khwn.hip.hpp
index 14b090f809..64490c765b 100644
--- a/src/include/gridwise_convolution_implicit_gemm_v1_chwn_cyxk_khwn.hip.hpp
+++ b/src/include/gridwise_convolution_implicit_gemm_v1_chwn_cyxk_khwn.hip.hpp
@@ -169,20 +169,19 @@ struct GridwiseConvolutionImplicitGemm_v1_chwn_cyxk_khwn
                 HoPerThread>{};
 
         // LDS: be careful of alignment
-        constexpr index_t in_block_element_size =
-            in_chwn_block_desc.GetElementSpace(Number<InBlockCopyDataPerRead>{});
+        constexpr index_t max_align =
+            mod_conv::max(index_t(4), InBlockCopyDataPerRead, WeiBlockCopyDataPerRead);
 
-        constexpr index_t wei_block_element_size =
-            wei_cyxk_block_desc.GetElementSpace(Number<WeiBlockCopyDataPerRead>{});
+        constexpr index_t in_block_space =
+            in_chwn_block_desc.GetElementSpace(Number<max_align>{});
 
-        constexpr index_t max_align = InBlockCopyDataPerRead > WeiBlockCopyDataPerRead
-                                          ? InBlockCopyDataPerRead
-                                          : WeiBlockCopyDataPerRead;
+        constexpr index_t wei_block_space =
+            wei_cyxk_block_desc.GetElementSpace(Number<max_align>{});
 
         __shared__ Float
-            p_in_block[max_align * ((in_block_element_size + max_align - 1) / max_align)];
+            p_in_block[in_block_space];
         __shared__ Float
-            p_wei_block[max_align * ((wei_block_element_size + max_align - 1) / max_align)];
+            p_wei_block[wei_block_space];
 
         // register
         Float p_out_thread[out_khwn_thread_desc.GetElementSpace()];
diff --git a/src/include/gridwise_convolution_implicit_gemm_v2_chwn_cyxk_khwn_lds_double_buffer.hip.hpp b/src/include/gridwise_convolution_implicit_gemm_v2_chwn_cyxk_khwn_lds_double_buffer.hip.hpp
index 234f750aca..554624bf48 100644
--- a/src/include/gridwise_convolution_implicit_gemm_v2_chwn_cyxk_khwn_lds_double_buffer.hip.hpp
+++ b/src/include/gridwise_convolution_implicit_gemm_v2_chwn_cyxk_khwn_lds_double_buffer.hip.hpp
@@ -208,11 +208,11 @@ struct GridwiseConvolutionImplicitGemm_v2_chwn_cyxk_khwn_lds_double_buffer
             blockwise_wei_copy.RunLoadRegisterClipboard(p_wei_global_block_offset,
                                                         p_wei_register_clipboard);
 
-#if 0
+#if 1
             blockwise_in_copy.RunStoreRegisterClipboard(p_in_register_clipboard, p_in_block_double);
             blockwise_wei_copy.RunStoreRegisterClipboard(p_wei_register_clipboard,
                                                          p_wei_block_double);
-#elif 1
+#else
             vmcnt(0);
             blockwise_in_copy.RunStoreRegisterClipboard_asm(p_in_register_clipboard,
                                                             p_in_block_double);
@@ -266,11 +266,11 @@ struct GridwiseConvolutionImplicitGemm_v2_chwn_cyxk_khwn_lds_double_buffer
                 {
                     for(index_t x = 0; x < X; ++x)
                     {
-#if 0
+#if 1
                         blockwise_gemm.Run
 #elif 0
                         blockwise_gemm.Run_RegisterDoubleBuffer
-#elif 1
+#elif 0
                         blockwise_gemm.Run_asm
 #endif
                         (p_wei_block_now + wei_cyxk_block_desc.Get1dIndex(0, y, x, 0),
@@ -279,12 +279,12 @@ struct GridwiseConvolutionImplicitGemm_v2_chwn_cyxk_khwn_lds_double_buffer
                     }
                 }
 
-#if 0
+#if 1
                 blockwise_in_copy.RunStoreRegisterClipboard(p_in_register_clipboard,
                                                             p_in_block_next);
                 blockwise_wei_copy.RunStoreRegisterClipboard(p_wei_register_clipboard,
                                                              p_wei_block_next);
-#elif 1
+#else
                 vmcnt(0);
                 blockwise_in_copy.RunStoreRegisterClipboard_asm(p_in_register_clipboard,
                                                                 p_in_block_next);
@@ -315,11 +315,11 @@ struct GridwiseConvolutionImplicitGemm_v2_chwn_cyxk_khwn_lds_double_buffer
             {
                 for(index_t x = 0; x < X; ++x)
                 {
-#if 0
+#if 1
                     blockwise_gemm.Run
 #elif 0
                     blockwise_gemm.Run_RegisterDoubleBuffer
-#elif 1
+#elif 0
                     blockwise_gemm.Run_asm
 #endif
                     (p_wei_block_double + wei_cyxk_block_desc.Get1dIndex(0, y, x, 0),
@@ -328,7 +328,7 @@ struct GridwiseConvolutionImplicitGemm_v2_chwn_cyxk_khwn_lds_double_buffer
                 }
             }
 
-#if 0
+#if 1
             blockwise_in_copy.RunStoreRegisterClipboard(p_in_register_clipboard,
                                                         p_in_block_double + in_block_space);
 
@@ -349,11 +349,11 @@ struct GridwiseConvolutionImplicitGemm_v2_chwn_cyxk_khwn_lds_double_buffer
             {
                 for(index_t x = 0; x < X; ++x)
                 {
-#if 0
+#if 1
                     blockwise_gemm.Run
 #elif 0
                     blockwise_gemm.Run_RegisterDoubleBuffer
-#elif 1
+#elif 0
                     blockwise_gemm.Run_asm
 #endif
                     (p_wei_block_double + wei_block_space +