diff --git a/CHANGES b/CHANGES
index a8feee06..993c8ce5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -28,7 +28,7 @@ SVN-HEAD
                   The SMSC LPC47M233 isn't currently supported
                   Support upcoming sysfs path to i2c adapters
                   Rename the modprobe configuration file to lm_sensors.conf
-                  Only report AMD Family 10h CPU with model > 2
+                  Only report AMD Family 10h CPU with working sensors
                   Add detection for AMD Family 11h thermal sensors
                   Add detection for Intel Atom thermal sensors
                   Add detection for National Semiconductor LM73
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index 07a027b6..4e538130 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -5396,10 +5396,13 @@ sub fam10h_pci_detect
 		next unless $probecpu->{vendor_id} eq 'AuthenticAMD' &&
 			    $probecpu->{'cpu family'} == 0x10;
 
-		next if $probecpu->{model} == 2;	# DR-B*
-		next if $probecpu->{model} == 4 &&
-			$probecpu->{stepping} <= 2;	# RB-C2
+		next if $probecpu->{model} < 4;		# DR-B*
 		next if $probecpu->{model} == 8;	# HY-D0
+		if ($probecpu->{model} == 4) {		# RB-C*
+			my @dram_cfg = split /\n/, `setpci -d 1022:1202 94.L 2>/dev/null`;
+			next unless @dram_cfg >= 1;
+			next unless hex($dram_cfg[0]) & 0x00000100;	# DDR3
+		}
 
 		return 9;
 	}