diff --git a/src/northbridge/intel/fsp_sandybridge/acpi/sandybridge.asl b/src/northbridge/intel/fsp_sandybridge/acpi/sandybridge.asl
index 7d51135f44..e6012ffdfc 100644
--- a/src/northbridge/intel/fsp_sandybridge/acpi/sandybridge.asl
+++ b/src/northbridge/intel/fsp_sandybridge/acpi/sandybridge.asl
@@ -30,7 +30,7 @@ Device (PDRC)
 
 	Name (PDRS, ResourceTemplate() {
 		Memory32Fixed(ReadWrite, 0xfed1c000, 0x00004000) // RCBA
-		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00004000)
+		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00008000)
 		Memory32Fixed(ReadWrite, DEFAULT_DMIBAR,   0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_EPBAR,    0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_PCIEXBAR, 0x04000000)
diff --git a/src/northbridge/intel/haswell/acpi/haswell.asl b/src/northbridge/intel/haswell/acpi/haswell.asl
index 1634fe3785..4db7295502 100644
--- a/src/northbridge/intel/haswell/acpi/haswell.asl
+++ b/src/northbridge/intel/haswell/acpi/haswell.asl
@@ -30,7 +30,7 @@ Device (PDRC)
 
 	Name (PDRS, ResourceTemplate() {
 		Memory32Fixed(ReadWrite, 0xfed1c000, 0x00004000) // RCBA
-		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00004000)
+		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00008000)
 		Memory32Fixed(ReadWrite, DEFAULT_DMIBAR,   0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_EPBAR,    0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_PCIEXBAR, 0x04000000)
diff --git a/src/northbridge/intel/nehalem/acpi/nehalem.asl b/src/northbridge/intel/nehalem/acpi/nehalem.asl
index aa74d0db34..3c6c2388fd 100644
--- a/src/northbridge/intel/nehalem/acpi/nehalem.asl
+++ b/src/northbridge/intel/nehalem/acpi/nehalem.asl
@@ -30,7 +30,7 @@ Device (PDRC)
 
 	Name (PDRS, ResourceTemplate() {
 		Memory32Fixed(ReadWrite, 0xfed1c000, 0x00004000) // RCBA
-		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00004000)
+		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00008000)
 		Memory32Fixed(ReadWrite, DEFAULT_DMIBAR,   0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_EPBAR,    0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_PCIEXBAR, 0x04000000)
diff --git a/src/northbridge/intel/sandybridge/acpi/sandybridge.asl b/src/northbridge/intel/sandybridge/acpi/sandybridge.asl
index 6708e270e9..e32d5f18fc 100644
--- a/src/northbridge/intel/sandybridge/acpi/sandybridge.asl
+++ b/src/northbridge/intel/sandybridge/acpi/sandybridge.asl
@@ -30,7 +30,7 @@ Device (PDRC)
 
 	Name (PDRS, ResourceTemplate() {
 		Memory32Fixed(ReadWrite, 0xfed1c000, 0x00004000) // RCBA
-		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00004000)
+		Memory32Fixed(ReadWrite, DEFAULT_MCHBAR,   0x00008000)
 		Memory32Fixed(ReadWrite, DEFAULT_DMIBAR,   0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_EPBAR,    0x00001000)
 		Memory32Fixed(ReadWrite, DEFAULT_PCIEXBAR, 0x04000000)