diff --git a/top/x400/x410_100_rfnoc_image_core.yml b/top/x400/x410_100_rfnoc_image_core.yml
index 2788e57..54ac97a 100644
--- a/top/x400/x410_100_rfnoc_image_core.yml
+++ b/top/x400/x410_100_rfnoc_image_core.yml
@@ -32,19 +32,19 @@ stream_endpoints:
   ep4:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
   ep5:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
   ep6:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
   ep7:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
 
 # A list of all NoC blocks in design
 # ----------------------------------
diff --git a/top/x400/x410_200_rfnoc_image_core.yml b/top/x400/x410_200_rfnoc_image_core.yml
index c10e511..ddc028b 100644
--- a/top/x400/x410_200_rfnoc_image_core.yml
+++ b/top/x400/x410_200_rfnoc_image_core.yml
@@ -32,19 +32,19 @@ stream_endpoints:
   ep4:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
   ep5:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
   ep6:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
   ep7:
     ctrl: False
     data: True
-    buff_size_bytes: 4096
+    buff_size_bytes: 16384
 
 # A list of all NoC blocks in design
 # ----------------------------------