diff --git a/src/ethernet.c b/src/ethernet.c
index c0c3307..4466a3b 100644
--- a/src/ethernet.c
+++ b/src/ethernet.c
@@ -75,7 +75,8 @@ uint32_t Eth_pkt_send(packet_t *pPacket)
 	volatile uint32_t *pEmac_ctrl = (uint32_t*)SYS_EMAC_TX_CTRL;
 	volatile uint32_t *pEmac_size = (uint32_t*)SYS_EMAC_TX_SIZE;
 	volatile uint32_t *pEmac_data = (uint32_t*)SYS_EMAC_DATA;
-
+	uint32_t *pData = (uint32_t*)pPacket->pkt_buf;
+	
 	uint32_t i, num_words, num_bytes;
 
 	num_bytes = pPacket->size;
@@ -90,9 +91,22 @@ uint32_t Eth_pkt_send(packet_t *pPacket)
 	if (num_bytes & 3)
 		num_words++;
 
+	while(num_words >= 8)
+	{
+		*pEmac_data = pData[i+0];
+		*pEmac_data = pData[i+1];
+		*pEmac_data = pData[i+2];
+		*pEmac_data = pData[i+3];
+		*pEmac_data = pData[i+4];
+		*pEmac_data = pData[i+5];
+		*pEmac_data = pData[i+6];
+		*pEmac_data = pData[i+7];
+		i += 8;
+		num_words -= 8;
+	}
 	for (i=0; i < num_words; i++)
 	{
-		*pEmac_data = ((uint32_t*)pPacket->pkt_buf)[i];
+		*pEmac_data = pData[i];
 	}
 
 	EMAC_TX_commit();
diff --git a/src/test_gpio.c b/src/test_gpio.c
index 1cafe72..3646813 100644
--- a/src/test_gpio.c
+++ b/src/test_gpio.c
@@ -200,7 +200,7 @@ int main()
 	volatile uint32_t *pEmac_data = (uint32_t*)SYS_EMAC_DATA_CACHED;
 	volatile uint32_t *pEmac_maddr = (uint32_t*)SYS_EMAC_MADDR;
 	volatile uint8_t *pEmac_maddr8 = (uint8_t*)SYS_EMAC_MADDR;
-	uint8_t buffer[2048], data[1024];
+	uint8_t buffer[2048], data[1460];
 	packet_t packet;
 	ARP *pARP;
 	IPV4 *pIPV4;
@@ -385,10 +385,10 @@ int main()
 */
 
 		start = clock();
+		Eth_pkt_create(&packet, TYPE_PROTO_IP, eth_myself, eth_bcst);
+		UDP_create(&packet, myIP, 10001, arpIpDst, 10002, data, sizeof(data));
 		for (j=0; j < 10000; j++)
 		{
-			Eth_pkt_create(&packet, TYPE_PROTO_IP, eth_myself, eth_bcst);
-			UDP_create(&packet, myIP, 10001, arpIpDst, 10002, data, sizeof(data));
 			size = Eth_pkt_send(&packet);
 			tx_byte_cnt += size;
 			tx_pkt_cnt++;