diff --git a/sys/dev/amdsmn/amdsmn.c b/sys/dev/amdsmn/amdsmn.c
--- a/sys/dev/amdsmn/amdsmn.c
+++ b/sys/dev/amdsmn/amdsmn.c
@@ -25,7 +25,7 @@
  */
 
 /*
- * Driver for the AMD Family 15h and 17h CPU System Management Network.
+ * Driver for the AMD Family 15h, 17h, 19h, 1Ah CPU System Management Network.
  */
 
 #include <sys/param.h>
@@ -62,6 +62,10 @@
 #define	PCI_DEVICE_ID_AMD_19H_M40H_ROOT		0x14b5
 #define	PCI_DEVICE_ID_AMD_19H_M60H_ROOT		0x14d8	/* Also F1AH M40H */
 #define	PCI_DEVICE_ID_AMD_19H_M70H_ROOT		0x14e8
+#define	PCI_DEVICE_ID_AMD_1AH_M00H_ROOT		0x153a
+#define	PCI_DEVICE_ID_AMD_1AH_M20H_ROOT		0x1507
+#define	PCI_DEVICE_ID_AMD_1AH_M60H_ROOT		0x1122
+
 
 struct pciid;
 struct amdsmn_softc {
@@ -129,6 +133,24 @@
 		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
 		.amdsmn_data_reg = F17H_SMN_DATA_REG,
 	},
+	{
+		.amdsmn_vendorid = CPU_VENDOR_AMD,
+		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_1AH_M00H_ROOT,
+		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
+		.amdsmn_data_reg = F17H_SMN_DATA_REG,
+	},
+	{
+		.amdsmn_vendorid = CPU_VENDOR_AMD,
+		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_1AH_M20H_ROOT,
+		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
+		.amdsmn_data_reg = F17H_SMN_DATA_REG,
+	},
+	{
+		.amdsmn_vendorid = CPU_VENDOR_AMD,
+		.amdsmn_deviceid = PCI_DEVICE_ID_AMD_1AH_M60H_ROOT,
+		.amdsmn_addr_reg = F17H_SMN_ADDR_REG,
+		.amdsmn_data_reg = F17H_SMN_DATA_REG,
+	},
 };
 
 /*
@@ -216,7 +238,7 @@
 	default:
 		return (ENXIO);
 	}
-	device_set_descf(dev, "AMD Family %xh System Management Network",
+	device_set_descf(dev, "AMD Family %02Xh System Management Network",
 	    family);
 
 	return (BUS_PROBE_GENERIC);
diff --git a/sys/dev/amdtemp/amdtemp.c b/sys/dev/amdtemp/amdtemp.c
--- a/sys/dev/amdtemp/amdtemp.c
+++ b/sys/dev/amdtemp/amdtemp.c
@@ -117,6 +117,9 @@
 #define	DEVICEID_AMD_HOSTB19H_M40H_ROOT	0x14b5
 #define	DEVICEID_AMD_HOSTB19H_M60H_ROOT	0x14d8	/* Also F1AH M40H */
 #define	DEVICEID_AMD_HOSTB19H_M70H_ROOT	0x14e8
+#define	DEVICEID_AMD_HOSTB1AH_M00H_ROOT	0x153a
+#define	DEVICEID_AMD_HOSTB1AH_M20H_ROOT	0x1507
+#define	DEVICEID_AMD_HOSTB1AH_M60H_ROOT	0x1122
 
 static const struct amdtemp_product {
 	uint16_t	amdtemp_vendorid;
@@ -145,6 +148,9 @@
 	{ VENDORID_AMD, DEVICEID_AMD_HOSTB19H_M40H_ROOT, false },
 	{ VENDORID_AMD,	DEVICEID_AMD_HOSTB19H_M60H_ROOT, false },
 	{ VENDORID_AMD,	DEVICEID_AMD_HOSTB19H_M70H_ROOT, false },
+	{ VENDORID_AMD,	DEVICEID_AMD_HOSTB1AH_M00H_ROOT, false },
+	{ VENDORID_AMD,	DEVICEID_AMD_HOSTB1AH_M20H_ROOT, false },
+	{ VENDORID_AMD,	DEVICEID_AMD_HOSTB1AH_M60H_ROOT, false },
 };
 
 /*
@@ -166,7 +172,7 @@
 #define	AMDTEMP_15H_M60H_REPTMP_CTRL	0xd8200ca4
 
 /*
- * Reported Temperature, Family 17h
+ * Reported Temperature, Family 17h - 1Ah
  *
  * According to AMD OSRR for 17H, section 4.2.1, bits 31-21 of this register
  * provide the current temp.  bit 19, when clear, means the temp is reported in
@@ -294,21 +300,33 @@
 static int
 amdtemp_probe(device_t dev)
 {
-	uint32_t family, model;
+	uint32_t family, model, stepping;
 
-	if (resource_disabled("amdtemp", 0))
+	if (resource_disabled("amdtemp", 0)) {
+		if (bootverbose)
+			device_printf(dev, "Resource disabled\n");
 		return (ENXIO);
-	if (!amdtemp_match(device_get_parent(dev), NULL))
+	}
+	if (!amdtemp_match(device_get_parent(dev), NULL)) {
+		if (bootverbose)
+			device_printf(dev, "amdtemp_match() failed\n");
 		return (ENXIO);
+	}
 
 	family = CPUID_TO_FAMILY(cpu_id);
 	model = CPUID_TO_MODEL(cpu_id);
+	stepping = CPUID_TO_STEPPING(cpu_id);
 
 	switch (family) {
 	case 0x0f:
-		if ((model == 0x04 && (cpu_id & CPUID_STEPPING) == 0) ||
-		    (model == 0x05 && (cpu_id & CPUID_STEPPING) <= 1))
+		if ((model == 0x04 && stepping == 0) ||
+		    (model == 0x05 && stepping <= 1)) {
+			if (bootverbose)
+				device_printf(dev,
+				    "Unsupported (Family=%02Xh, Model=%02Xh, Stepping=%02Xh)\n",
+				    family, model, stepping);
 			return (ENXIO);
+		}
 		break;
 	case 0x10:
 	case 0x11:
@@ -323,7 +341,8 @@
 	default:
 		return (ENXIO);
 	}
-	device_set_desc(dev, "AMD CPU On-Die Thermal Sensors");
+	device_set_descf(dev, "AMD Family %02Xh CPU On-Die Thermal Sensors",
+	    family);
 
 	return (BUS_PROBE_GENERIC);
 }
@@ -484,7 +503,7 @@
 		needsmn = true;
 		break;
 	default:
-		device_printf(dev, "Bogus family 0x%x\n", family);
+		device_printf(dev, "Bogus family %02Xh\n", family);
 		return (ENXIO);
 	}
 
@@ -493,7 +512,7 @@
 		    device_get_parent(dev), "amdsmn", -1);
 		if (sc->sc_smn == NULL) {
 			if (bootverbose)
-				device_printf(dev, "No SMN device found\n");
+				device_printf(dev, "No amdsmn(4) device found\n");
 			return (ENXIO);
 		}
 	}
@@ -509,7 +528,7 @@
 		device_printf(dev,
 		    "Erratum 319: temperature measurement may be inaccurate\n");
 	if (bootverbose)
-		device_printf(dev, "Found %d cores and %d sensors.\n",
+		device_printf(dev, "Found %d cores and %d sensors\n",
 		    sc->sc_ncores,
 		    sc->sc_ntemps > 1 ? sc->sc_ntemps * sc->sc_ncores : 1);
 
@@ -857,7 +876,7 @@
 		break;
 	default:
 		device_printf(dev,
-		    "Unrecognized Family 17h Model: %02xh\n", model);
+		    "Unrecognized Family 17h Model: %02Xh\n", model);
 		return;
 	}
 
@@ -877,7 +896,7 @@
 		maxreg = 8;
 		_Static_assert((int)NUM_CCDS >= 8, "");
 		break;
-	case 0x10 ... 0x1f:
+	case 0x10 ... 0x1f: /* Zen4 EPYC "Genoa" */
 		sc->sc_temp_base = AMDTEMP_ZEN4_10H_CCD_TMP_BASE;
 		maxreg = 12;
 		_Static_assert((int)NUM_CCDS >= 12, "");
@@ -891,7 +910,7 @@
 		break;
 	default:
 		device_printf(dev,
-		    "Unrecognized Family 19h Model: %02xh\n", model);
+		    "Unrecognized Family 19h Model: %02Xh\n", model);
 		return;
 	}
 
@@ -905,14 +924,16 @@
 	uint32_t maxreg;
 
 	switch (model) {
+	case 0x00 ... 0x2f: /* Zen5 EPYC "Turin" */
 	case 0x40 ... 0x4f: /* Zen5 Ryzen "Granite Ridge" */
+	case 0x60 ... 0x7f: /* ??? */
 		sc->sc_temp_base = AMDTEMP_ZEN4_CCD_TMP_BASE;
 		maxreg = 8;
 		_Static_assert((int)NUM_CCDS >= 8, "");
 		break;
 	default:
 		device_printf(dev,
-		    "Unrecognized Family 1ah Model: %02xh\n", model);
+		    "Unrecognized Family 1Ah Model: %02Xh\n", model);
 		return;
 	}