diff --git a/src/mainboard/clevo/cml-u/Kconfig b/src/mainboard/clevo/cml-u/Kconfig
index 17142f3242..6d388e7ba2 100644
--- a/src/mainboard/clevo/cml-u/Kconfig
+++ b/src/mainboard/clevo/cml-u/Kconfig
@@ -61,10 +61,6 @@ config DIMM_MAX
 	int
 	default 2 if BOARD_CLEVO_L140CU_BASE
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config VGA_BIOS_ID
 	string
 	default "8086,9b41"
diff --git a/src/mainboard/google/drallion/Kconfig b/src/mainboard/google/drallion/Kconfig
index fdcbd05b1a..31cac26a76 100644
--- a/src/mainboard/google/drallion/Kconfig
+++ b/src/mainboard/google/drallion/Kconfig
@@ -45,10 +45,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config DRIVER_TPM_I2C_BUS
 	hex
 	default 0x4
diff --git a/src/mainboard/google/hatch/Kconfig b/src/mainboard/google/hatch/Kconfig
index 13e4248f3b..c4ca4f9bc3 100644
--- a/src/mainboard/google/hatch/Kconfig
+++ b/src/mainboard/google/hatch/Kconfig
@@ -70,10 +70,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config ROMSTAGE_SPD_CBFS
 	bool
 	default y if !ROMSTAGE_SPD_SMBUS
diff --git a/src/mainboard/google/sarien/Kconfig b/src/mainboard/google/sarien/Kconfig
index feed5e9fee..144e244d1d 100644
--- a/src/mainboard/google/sarien/Kconfig
+++ b/src/mainboard/google/sarien/Kconfig
@@ -40,10 +40,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config DRIVER_TPM_I2C_BUS
 	hex
 	default 0x4
diff --git a/src/mainboard/prodrive/hermes/Kconfig b/src/mainboard/prodrive/hermes/Kconfig
index 0219e051fc..178accefa9 100644
--- a/src/mainboard/prodrive/hermes/Kconfig
+++ b/src/mainboard/prodrive/hermes/Kconfig
@@ -50,10 +50,6 @@ config OVERRIDE_DEVICETREE
 	string
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config CONSOLE_POST
 	bool
 	default y
diff --git a/src/mainboard/siemens/chili/Kconfig b/src/mainboard/siemens/chili/Kconfig
index a261abcb43..4569762d81 100644
--- a/src/mainboard/siemens/chili/Kconfig
+++ b/src/mainboard/siemens/chili/Kconfig
@@ -59,10 +59,6 @@ config INTEL_GMA_VBT_FILE
 	string
 	default "src/mainboard/$(MAINBOARDDIR)/variants/$(CONFIG_VARIANT_DIR)/data.vbt"
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config CBFS_SIZE
 	hex
 	default 0xb00000
diff --git a/src/mainboard/system76/gaze15/Kconfig b/src/mainboard/system76/gaze15/Kconfig
index 12f94c2f2b..aefacdd947 100644
--- a/src/mainboard/system76/gaze15/Kconfig
+++ b/src/mainboard/system76/gaze15/Kconfig
@@ -60,10 +60,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config VGA_BIOS_ID
 	string
 	default "8086,9bc4"
diff --git a/src/mainboard/system76/lemp9/Kconfig b/src/mainboard/system76/lemp9/Kconfig
index bf2af91d53..675b738bd8 100644
--- a/src/mainboard/system76/lemp9/Kconfig
+++ b/src/mainboard/system76/lemp9/Kconfig
@@ -57,10 +57,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config VGA_BIOS_FILE
 	string
 	default "pci8086,9b41.rom"
diff --git a/src/mainboard/system76/oryp5/Kconfig b/src/mainboard/system76/oryp5/Kconfig
index 009633d485..7ff1424fec 100644
--- a/src/mainboard/system76/oryp5/Kconfig
+++ b/src/mainboard/system76/oryp5/Kconfig
@@ -61,10 +61,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config POST_DEVICE
 	bool
 	default n
diff --git a/src/mainboard/system76/whl-u/Kconfig b/src/mainboard/system76/whl-u/Kconfig
index 2861ce55d1..e93b4216c0 100644
--- a/src/mainboard/system76/whl-u/Kconfig
+++ b/src/mainboard/system76/whl-u/Kconfig
@@ -73,10 +73,6 @@ config DIMM_MAX
 	int
 	default 2
 
-config DIMM_SPD_SIZE
-	int
-	default 512
-
 config POST_DEVICE
 	bool
 	default n
diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig
index d4bedc1396..65277f2f07 100644
--- a/src/soc/intel/cannonlake/Kconfig
+++ b/src/soc/intel/cannonlake/Kconfig
@@ -119,6 +119,9 @@ config MAX_CPUS
 	int
 	default 12
 
+config DIMM_SPD_SIZE
+	default 512
+
 config DCACHE_RAM_BASE
 	default 0xfef00000