diff --git a/src/northbridge/intel/x4x/ram_calc.c b/src/northbridge/intel/x4x/ram_calc.c
index 27562eae83..5a6a7675f1 100644
--- a/src/northbridge/intel/x4x/ram_calc.c
+++ b/src/northbridge/intel/x4x/ram_calc.c
@@ -28,7 +28,7 @@
 /** Decodes used Graphics Mode Select (GMS) to kilobytes. */
 u32 decode_igd_memory_size(const u32 gms)
 {
-	static const u16 ggc2uma[] = { 0, 0, 0, 0, 0,
+	static const u16 ggc2uma[] = { 0, 1, 4, 8, 16,
 			32, 48, 64, 128, 256, 96, 160, 224, 352 };
 
 	if (gms > ARRAY_SIZE(ggc2uma))
diff --git a/src/northbridge/intel/x4x/raminit_ddr2.c b/src/northbridge/intel/x4x/raminit_ddr2.c
index 5d457e6de1..ed6ab607e0 100644
--- a/src/northbridge/intel/x4x/raminit_ddr2.c
+++ b/src/northbridge/intel/x4x/raminit_ddr2.c
@@ -1625,7 +1625,8 @@ static void mmap_ddr2(struct sysinfo *s)
 	u32 gfxsize, gttsize, tsegsize, mmiosize, tom, tolud, touud;
 	u32 gfxbase, gttbase, tsegbase, reclaimbase, reclaimlimit;
 	u16 ggc;
-	u16 ggc2uma[] = { 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352 };
+	u16 ggc2uma[] = { 0, 1, 4, 8, 16, 32, 48, 64, 128, 256, 96,
+			  160, 224, 352 };
 	u8 ggc2gtt[] = { 0, 1, 0, 2, 0, 0, 0, 0, 0, 2, 3, 4};
 
 	ggc = pci_read_config16(PCI_DEV(0,0,0), 0x52);