diff --git a/bench/arty.py b/bench/arty.py
index 94389ed..b8e720a 100755
--- a/bench/arty.py
+++ b/bench/arty.py
@@ -42,7 +42,7 @@ class BenchSoC(SoCCore):
             pads       = self.platform.request("eth"),
             with_hw_init_reset = False)
         self.add_csr("ethphy")
-        self.add_etherbone(phy=self.ethphy, buffer_depth=256)
+        self.add_etherbone(phy=self.ethphy, buffer_depth=128)
 
         # SRAM -------------------------------------------------------------------------------------
         self.add_ram("sram", 0x20000000, 0x1000)
diff --git a/bench/colorlight_5a_75b.py b/bench/colorlight_5a_75b.py
index a7e0d86..1a1a3dd 100755
--- a/bench/colorlight_5a_75b.py
+++ b/bench/colorlight_5a_75b.py
@@ -43,7 +43,7 @@ class BenchSoC(SoCCore):
             tx_delay   = 0e-9,
             with_hw_init_reset = False)
         self.add_csr("ethphy")
-        self.add_etherbone(phy=self.ethphy, buffer_depth=256)
+        self.add_etherbone(phy=self.ethphy, buffer_depth=128)
 
         # SRAM -------------------------------------------------------------------------------------
         self.add_ram("sram", 0x20000000, 0x1000)
diff --git a/bench/genesys2.py b/bench/genesys2.py
index f5490ba..60cc805 100755
--- a/bench/genesys2.py
+++ b/bench/genesys2.py
@@ -42,7 +42,7 @@ class BenchSoC(SoCCore):
             pads       = self.platform.request("eth"),
             with_hw_init_reset = False)
         self.add_csr("ethphy")
-        self.add_etherbone(phy=self.ethphy, buffer_depth=256)
+        self.add_etherbone(phy=self.ethphy, buffer_depth=128)
 
         # SRAM -------------------------------------------------------------------------------------
         self.add_ram("sram", 0x20000000, 0x1000)
diff --git a/bench/test_etherbone.py b/bench/test_etherbone.py
index f7115fb..54185e0 100755
--- a/bench/test_etherbone.py
+++ b/bench/test_etherbone.py
@@ -105,7 +105,7 @@ def speed_test(port):
     wb.open()
 
     test_size  = 16*KiB
-    burst_size = 255 # FIXME: Use 256, fix Etherbone encoding.
+    burst_size = 128
 
     print("Testing write speed... ", end="")
     start = time.time()