diff --git a/src/mainboard/google/brox/variants/baseboard/brox/gpio.c b/src/mainboard/google/brox/variants/baseboard/brox/gpio.c
index a909533..841da6f 100644
--- a/src/mainboard/google/brox/variants/baseboard/brox/gpio.c
+++ b/src/mainboard/google/brox/variants/baseboard/brox/gpio.c
@@ -393,21 +393,36 @@
 	PAD_CFG_GPI(GPP_S0, NONE, DEEP),
 };
 
+static const struct pad_config romstage_gpio_table[] = {
+	/* GPP_E10 : THC0_SPI1_CS_L/GSPI0_CS0_L ==> MEM_STRAP_3 */
+	PAD_CFG_GPI(GPP_E10, NONE, DEEP),
+	/* GPP_E12 : THC0_SPI1_IO1/I2C0A_SDA/GSPI0_MISO ==> MEM_STRAP_1 */
+	PAD_CFG_GPI(GPP_E12, NONE, DEEP),
+	/* GPP_E13 : THC0_SPI1_IO0/I2C0A_SCL/GSPI0_MOSI ==> MEM_STRAP_2 */
+	PAD_CFG_GPI(GPP_E13, NONE, DEEP),
+	/* GPP_E15 : SRCCLK_OE8_L ==> MEM_STRAP_0 */
+	PAD_CFG_GPI(GPP_E15, NONE, DEEP),
+	/* GPP_F9 : [NF1: BOOTMPC NF6: USB_C_GPP_F9] ==> SSD_PERST_L */
+	PAD_CFG_GPO(GPP_F9, 1, DEEP),
+	/* GPP_S0 : SNDW0_CLL/I2S1_SCLK ==> MEM_CH_SEL */
+	PAD_CFG_GPI(GPP_S0, NONE, DEEP),
+};
+
 const struct pad_config *__weak variant_early_gpio_table(size_t *num)
 {
 	*num = ARRAY_SIZE(early_gpio_table);
 	return early_gpio_table;
 }
 
+const struct pad_config *__weak variant_romstage_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(romstage_gpio_table);
+	return romstage_gpio_table;
+}
+
 static const struct cros_gpio cros_gpios[] = {
 	CROS_GPIO_REC_AL(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME),
 	CROS_GPIO_WP_AH(GPIO_PCH_WP, CROS_GPIO_DEVICE_NAME),
 };
 
 DECLARE_WEAK_CROS_GPIOS(cros_gpios);
-
-const struct pad_config *__weak variant_romstage_gpio_table(size_t *num)
-{
-	*num = 0;
-	return NULL;
-}
diff --git a/src/mainboard/google/brox/variants/baseboard/brox/memory.c b/src/mainboard/google/brox/variants/baseboard/brox/memory.c
index bcad9b4..dabb653 100644
--- a/src/mainboard/google/brox/variants/baseboard/brox/memory.c
+++ b/src/mainboard/google/brox/variants/baseboard/brox/memory.c
@@ -5,65 +5,64 @@
 #include <gpio.h>
 
 static const struct mb_cfg baseboard_memcfg = {
-	.type = MEM_TYPE_LP4X,
+	.type = MEM_TYPE_LP5X,
 
-	.rcomp = {
-		/* Baseboard uses only 100ohm Rcomp resistors */
-		.resistor = 100,
-
-		/* Baseboard Rcomp target values */
-		.targets = {40, 30, 30, 30, 30},
-	},
+	/* Leave Rcomp unspecified to use the FSP optimized defaults */
 
 	/* DQ byte map */
 	.lpx_dq_map = {
 		.ddr0 = {
-			.dq0 = {  9, 11,  8, 10, 12, 14, 13, 15, },
-			.dq1 = {  4,  7,  6,  5,  2,  3,  0,  1, },
+			.dq0 = { 4,  7, 5,  6,  0,  1,  2,  3, },
+			.dq1 = { 8, 11, 9, 10, 13, 14, 15, 12, },
 		},
 		.ddr1 = {
-			.dq0 = { 15, 12, 14, 13,  9, 10, 11,  8, },
-			.dq1 = {  0,  1,  3,  2,  7,  5,  4,  6, },
+			.dq0 = {  1,  2,  3,  0, 6,  4, 7,  5, },
+			.dq1 = { 13, 15, 12, 14, 8, 11, 9, 10, },
 		},
 		.ddr2 = {
-			.dq0 = {  2,  3,  1,  0,  6,  7,  5,  4, },
-			.dq1 = { 15,  9, 14,  8, 11, 10, 13, 12, },
+			.dq0 = {  0,  3,  2,  1, 6,  5, 7,  4, },
+			.dq1 = { 14, 12, 15, 13, 8, 10, 9, 11, },
 		},
 		.ddr3 = {
-			.dq0 = {  3,  1,  2,  0,  4,  6,  7,  5, },
-			.dq1 = { 13, 15, 14, 12, 11,  9,  8, 10, },
+			.dq0 = {  5, 7,  4, 6,  2,  0,  1,  3, },
+			.dq1 = { 10, 9, 11, 8, 12, 15, 13, 14, },
 		},
 		.ddr4 = {
-			.dq0 = { 13, 12, 14, 15,  9,  8, 10, 11, },
-			.dq1 = {  4,  7,  5,  6,  1,  2,  0,  3, },
+			.dq0 = { 4,  6, 5,  7,  3,  2,  1,  0, },
+			.dq1 = { 8, 11, 9, 10, 14, 13, 15, 12, },
 		},
 		.ddr5 = {
-			.dq0 = {  5,  0,  6,  4,  3,  1,  7,  2, },
-			.dq1 = { 11,  9, 10,  8, 15, 12, 14, 13, },
+			.dq0 = {  2,  1,  3,  0, 6,  4, 7,  5, },
+			.dq1 = { 13, 15, 12, 14, 8, 11, 9, 10, },
 		},
 		.ddr6 = {
-			.dq0 = { 15, 12, 14, 13, 10,  9, 11,  8, },
-			.dq1 = {  0,  1,  2,  3,  5,  6,  4,  7, },
+			.dq0 = { 14, 12, 15, 13, 8, 11, 10, 9, },
+			.dq1 = {  1,  2,  3,  0, 5,  6,  7, 4, },
 		},
 		.ddr7 = {
-			.dq0 = {  0,  3,  1,  2,  4,  5,  6,  7, },
-			.dq1 = { 11,  8, 13, 14,  9, 12, 15, 10, },
+			.dq0 = { 3, 6,  2,  7,  5,  0,  1,  4, },
+			.dq1 = { 9, 8, 14, 15, 10, 12, 13, 11, },
 		},
 	},
 
 	/* DQS CPU<>DRAM map */
 	.lpx_dqs_map = {
-		.ddr0 = { .dqs0 = 1, .dqs1 = 0 },
-		.ddr1 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr0 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr1 = { .dqs0 = 0, .dqs1 = 1 },
 		.ddr2 = { .dqs0 = 0, .dqs1 = 1 },
 		.ddr3 = { .dqs0 = 0, .dqs1 = 1 },
-		.ddr4 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr4 = { .dqs0 = 0, .dqs1 = 1 },
 		.ddr5 = { .dqs0 = 0, .dqs1 = 1 },
-		.ddr6 = { .dqs0 = 1, .dqs1 = 0 },
-		.ddr7 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr6 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr7 = { .dqs0 = 0, .dqs1 = 1 }
 	},
 
-	.ect = 1, /* Enable Early Command Training */
+	.lp5x_config = {
+		.ccc_config = 0x99,
+	},
+
+	.ect = 1, /* Early Command Training */
+
 };
 
 const struct mb_cfg *__weak variant_memory_params(void)
@@ -75,16 +74,16 @@
 {
 	/*
 	 * Memory configuration board straps
-	 * GPIO_MEM_CONFIG_0	GPP_E11
-	 * GPIO_MEM_CONFIG_1	GPP_E2
-	 * GPIO_MEM_CONFIG_2	GPP_E1
-	 * GPIO_MEM_CONFIG_3	GPP_E12
+	 * MEM_STRAP_0	GPP_E15
+	 * MEM_STRAP_1	GPP_E12
+	 * MEM_STRAP_2	GPP_E13
+	 * MEM_STRAP_3	GPP_E10
 	 */
 	gpio_t spd_gpios[] = {
-		GPP_E11,
-		GPP_E2,
-		GPP_E1,
+		GPP_E15,
 		GPP_E12,
+		GPP_E13,
+		GPP_E10,
 	};
 
 	return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
@@ -92,8 +91,8 @@
 
 bool __weak variant_is_half_populated(void)
 {
-	/* GPIO_MEM_CH_SEL GPP_E13 */
-	return gpio_get(GPP_E13);
+	/* MEM_CH_SEL GPP_S0 */
+	return gpio_get(GPP_S0);
 }
 
 void __weak variant_get_spd_info(struct mem_spd *spd_info)
diff --git a/src/mainboard/google/brox/variants/brox/gpio.c b/src/mainboard/google/brox/variants/brox/gpio.c
index 5805bee..5af3552 100644
--- a/src/mainboard/google/brox/variants/brox/gpio.c
+++ b/src/mainboard/google/brox/variants/brox/gpio.c
@@ -4,21 +4,8 @@
 #include <boardid.h>
 #include <soc/gpio.h>
 
-
-static const struct pad_config romstage_gpio_table[] = {
-
-	/* GPP_F9 : [NF1: BOOTMPC NF6: USB_C_GPP_F9] ==> SSD_PERST_L */
-	PAD_CFG_GPO(GPP_F9, 1, DEEP),
-};
-
 const struct pad_config *variant_gpio_override_table(size_t *num)
 {
 	*num = 0;
 	return NULL;
 }
-
-const struct pad_config *variant_romstage_gpio_table(size_t *num)
-{
-	*num = ARRAY_SIZE(romstage_gpio_table);
-	return romstage_gpio_table;
-}