diff --git a/src/northbridge/intel/x4x/raminit_ddr23.c b/src/northbridge/intel/x4x/raminit_ddr23.c
index b072154bb9..cbec4acf9f 100644
--- a/src/northbridge/intel/x4x/raminit_ddr23.c
+++ b/src/northbridge/intel/x4x/raminit_ddr23.c
@@ -1800,7 +1800,10 @@ static void set_enhanced_mode(struct sysinfo *s)
 	MCHBAR32(0xfc4) = 0xfe22244;
 	MCHBAR8(0x12f) = 0x5c;
 	MCHBAR8(0xfb0) = (MCHBAR8(0xfb0) & ~1) | 1;
-	MCHBAR8(0x12f) = MCHBAR8(0x12f) | 0x2;
+	if (s->selected_timings.mem_clk <= MEM_CLOCK_800MHz)
+		MCHBAR8(0x12f) = MCHBAR8(0x12f) | 0x2;
+	else
+		MCHBAR8(0x12f) = MCHBAR8(0x12f) & 0x2;
 	MCHBAR8(0x6c0) = (MCHBAR8(0x6c0) & ~0xf0) | 0xa0;
 	MCHBAR32(0xfa8) = 0x30d400;
 
@@ -1837,31 +1840,57 @@ static void power_settings(struct sysinfo *s)
 	u8 twl = 0;
 	u16 x264, x23c;
 
-	twl = s->selected_timings.CAS - 1;
-	x264 = 0x78;
-	switch (s->selected_timings.mem_clk) {
-	default:
-	case MEM_CLOCK_667MHz:
-		reg1 = 0x99;
-		reg2 = 0x1048a9;
-		clkgate = 0x230000;
-		x23c = 0x7a89;
-		break;
-	case MEM_CLOCK_800MHz:
-		if (s->selected_timings.CAS == 5) {
-			reg1 = 0x19a;
-			reg2 = 0x1048aa;
-		} else {
-			reg1 = 0x9a;
-			reg2 = 0x2158aa;
+	if (s->spd_type == DDR2) {
+		twl = s->selected_timings.CAS - 1;
+		x264 = 0x78;
+
+		switch (s->selected_timings.mem_clk) {
+		default:
+		case MEM_CLOCK_667MHz:
+			reg1 = 0x99;
+			reg2 = 0x1048a9;
+			clkgate = 0x230000;
+			x23c = 0x7a89;
+			break;
+		case MEM_CLOCK_800MHz:
+			if (s->selected_timings.CAS == 5) {
+				reg1 = 0x19a;
+				reg2 = 0x1048aa;
+			} else {
+				reg1 = 0x9a;
+				reg2 = 0x2158aa;
 			x264 = 0x89;
+			}
+			clkgate = 0x280000;
+			x23c = 0x7b89;
+			break;
+		}
+		reg3 = 0x232;
+		reg4 = 0x2864;
+	} else { /* DDR3 */
+		int ddr3_idx = s->selected_timings.mem_clk - MEM_CLOCK_800MHz;
+		int cas_idx = s->selected_timings.CAS - 5;
+
+		twl = s->selected_timings.mem_clk - MEM_CLOCK_800MHz + 5;
+		reg1 = ddr3_c2_tab[s->nmode - 1][ddr3_idx][cas_idx][0];
+		reg2 = ddr3_c2_tab[s->nmode - 1][ddr3_idx][cas_idx][1];
+		reg3 = 0x764;
+		reg4 = 0x78c8;
+		x264 = ddr3_c2_x264[ddr3_idx][cas_idx];
+		x23c = ddr3_c2_x23c[ddr3_idx][cas_idx];
+		switch (s->selected_timings.mem_clk) {
+		case MEM_CLOCK_800MHz:
+		default:
+			clkgate = 0x280000;
+			break;
+		case MEM_CLOCK_1066MHz:
+			clkgate = 0x350000;
+			break;
+		case MEM_CLOCK_1333MHz:
+			clkgate = 0xff0000;
+			break;
 		}
-		clkgate = 0x280000;
-		x23c = 0x7b89;
-		break;
 	}
-	reg3 = 0x232;
-	reg4 = 0x2864;
 
 	if (CHANNEL_IS_POPULATED(s->dimms, 0) && CHANNEL_IS_POPULATED(s->dimms, 1))
 		MCHBAR32(0x14) = 0x0010461f;
@@ -1918,10 +1947,6 @@ static void power_settings(struct sysinfo *s)
 		MCHBAR32(0x110c) = 0x100;
 	MCHBAR32(0x1110) = 0x10810350 & ~0x78;
 	MCHBAR32(0x1114) = 0;
-	if (s->selected_timings.mem_clk == MEM_CLOCK_667MHz)
-		twl = 5;
-	else
-		twl = 6;
 	x592 = 0xff;
 	if (pci_read_config8(PCI_DEV(0, 0, 0), 0x8) < 3)
 		x592 = ~0x4;
diff --git a/src/northbridge/intel/x4x/raminit_tables.c b/src/northbridge/intel/x4x/raminit_tables.c
index 47d8a98bee..8ff93c9230 100644
--- a/src/northbridge/intel/x4x/raminit_tables.c
+++ b/src/northbridge/intel/x4x/raminit_tables.c
@@ -288,3 +288,84 @@ const u8 ddr3_emrs1_rtt_nom_config[16][4] = {  /* [Config][Rank] */
 	{0x81, 0x81, 0x81, 0x00},	/* 8D_16S */
 	{0x81, 0x00, 0x81, 0x00},	/* 16S_16S */
 };
+
+const u32 ddr3_c2_tab[2][3][6][2] = { /* [n-mode][ddr3 freq][CAS][reg] */
+		/* 115h[15:0]	117h[23:0] */
+	{ /* 1N mode */
+		{ /* DDR3 800MHz */
+			{0x0189, 0x000aaa}, /* CAS = 5 */
+			{0x0189, 0x101aaa}, /* CAS = 6 */
+		},
+		{ /* DDR3 1067MHz */
+			{0x0000, 0x000000}, /* CAS = 5 - Not supported */
+			{0x0089, 0x000bbb}, /* CAS = 6 */
+			{0x0099, 0x101bbb}, /* CAS = 7 */
+			{0x0099, 0x202bbb} /* CAS = 8 */
+		},{ /* DDR3 1333 */
+			{0x0000, 0x000000}, /* CAS = 5 - Not supported */
+			{0x0000, 0x000000}, /* CAS = 6 - Not supported */
+			{0x0000, 0x000000}, /* CAS = 7 - Not supported */
+			{0x129a, 0x0078dc}, /* CAS = 8 */
+			{0x028a, 0x0078dc}, /* CAS = 9 */
+			{0x028a, 0x1088dc}, /* CAS = 10 */
+		},
+	},
+	{ /* 2N mode */
+		{ /* DDR3 800MHz */
+			{0x0189, 0x000aaa}, /* CAS = 5 */
+			{0x0189, 0x101aaa}, /* CAS = 6 */
+			{0x0000, 0x000000}, /* CAS = 7 - Not supported */
+			{0x0000, 0x000000} /* CAS = 8 - Not suppported */
+		},
+		{ /* DDR3 1067 */
+			{0x0000, 0x000000}, /* CAS = 5 - Not supported */
+			{0x0089, 0x000bbb}, /* CAS = 6 */
+			{0x0099, 0x101bbb}, /* CAS = 7 */
+			{0x0099, 0x202bbb} /* CAS = 8 */
+		},{ /* DDR3 1333MHz */
+			{0x0000, 0x000000}, /* CAS = 5 - Not supported  */
+			{0x0000, 0x000000}, /* CAS = 6 - Not supported */
+			{0x0000, 0x000000}, /* CAS = 7 - Not supported */
+			{0x019a, 0x0078dc}, /* CAS = 8 */
+			{0x019a, 0x1088dc}, /* CAS = 9 */
+			{0x019a, 0x2098dc}, /* CAS = 10 */
+		},
+	}
+};
+
+const u8 ddr3_c2_x264[3][6] = { /* [freq][cas] */
+	/* DDR3 800MHz */
+	{0x78, /* CAS = 5  */
+	 0x89}, /* CAS = 6 */
+	/* DDR3 1066 */
+	{0x00, /* CAS = 5 - Not supported */
+	 0xff, /* CAS = 6 */
+	 0x8a, /* CAS = 7 */
+	 0x9a}, /* CAS = 8 */
+	/* DDR3 1333 */
+	{0x00, /* CAS = 5 - Not supported */
+	 0x00, /* CAS = 6 - Not supported */
+	 0xff, /* CAS = 7 - Not supported */
+	 0xff, /* CAS = 8 */
+	 0xff, /* CAS = 9 */
+	 0xff}, /* CAS = 10 */
+};
+
+const u16 ddr3_c2_x23c[3][6]={ /* [freq][cas] */
+	/* DDR3 800MHz */
+	{0x9bbb, /* CAS = 5 */
+	 0x8bbb}, /* CAS = 6 */
+	/* DDR3 1066MHz */
+	{0x0000, /* CAS = 5 - Not supported */
+	 0x9baa, /* CAS = 6 */
+	 0x8caa, /* CAS = 7 */
+	 0x7daa}, /* CAS = 8 */
+
+	/* DDR3 1333MHz */
+	{0x0000, /* CAS = 5 - Not supported */
+	 0x0000, /* CAS = 6 - Not supported */
+	 0x0000, /* CAS = 7 - Not supported */
+	 0xaecb, /* CAS = 8 */
+	 0x9fcb, /* CAS = 9 */
+	 0x8fcb}, /* CAS = 10 */
+};
diff --git a/src/northbridge/intel/x4x/x4x.h b/src/northbridge/intel/x4x/x4x.h
index 34979a01da..13ca783ac9 100644
--- a/src/northbridge/intel/x4x/x4x.h
+++ b/src/northbridge/intel/x4x/x4x.h
@@ -392,6 +392,9 @@ extern const struct dll_setting default_ddr3_800_dq[2][TOTAL_BYTELANES];
 extern const struct dll_setting default_ddr3_1067_dq[2][TOTAL_BYTELANES];
 extern const struct dll_setting default_ddr3_1333_dq[2][TOTAL_BYTELANES];
 extern const u8 ddr3_emrs1_rtt_nom_config[16][4];
+extern const u32 ddr3_c2_tab[2][3][6][2];
+extern const u8 ddr3_c2_x264[3][6];
+extern const u16 ddr3_c2_x23c[3][6];
 
 struct acpi_rsdp;
 #ifndef __SIMPLE_DEVICE__