diff --git a/Source/Processors/DataThreads/rhythm-api/rhd2000evalboard.h b/Source/Processors/DataThreads/rhythm-api/rhd2000evalboard.h
index d3bb492fc4cc5769316492695c8e64872ad61ecd..5c78bafab0359693eda59df7be7b9bea937266c0 100755
--- a/Source/Processors/DataThreads/rhythm-api/rhd2000evalboard.h
+++ b/Source/Processors/DataThreads/rhythm-api/rhd2000evalboard.h
@@ -30,7 +30,7 @@
 
 #define MAX_NUM_DATA_STREAMS(u3) ( u3 ? MAX_NUM_DATA_STREAMS_USB3 : MAX_NUM_DATA_STREAMS_USB2 )
 
-#define USB3_BLOCK_SIZE	2048
+#define USB3_BLOCK_SIZE	1024
 #define DDR_BLOCK_SIZE 32
 
 #include <queue>