diff --git a/src/northbridge/intel/sandybridge/raminit_common.c b/src/northbridge/intel/sandybridge/raminit_common.c
index d6d545c..fea3ca4 100644
--- a/src/northbridge/intel/sandybridge/raminit_common.c
+++ b/src/northbridge/intel/sandybridge/raminit_common.c
@@ -2809,8 +2809,8 @@
 	int t3_ns;
 	u32 r32;
 
-	/* FIXME: This register only exists on Ivy Bridge */
-	mchbar_write32(WMM_READ_CONFIG, 0x46);
+	if (IS_IVY_CPU(ctrl->cpu))
+		mchbar_write32(WMM_READ_CONFIG, 0x46);
 
 	FOR_ALL_CHANNELS {
 		union tc_othp_reg tc_othp = {