diff --git a/src/machine/m_at_slot1.c b/src/machine/m_at_slot1.c
index cb77c332d..eb5c0e90b 100644
--- a/src/machine/m_at_slot1.c
+++ b/src/machine/m_at_slot1.c
@@ -1039,11 +1039,8 @@ machine_at_p6sba_init(const machine_t *model)
     device_add_params(&w83977_device, (void *) (W83977TF | W83977_AMI | W83977_NO_NVR));
     device_add(&intel_flash_bxt_device);
     spd_register(SPD_TYPE_SDRAM, 0x7, 256);
-    device_add(&w83781d_device);    /* fans: CPU1, CPU2, Thermal Control; temperatures: unused, CPU1, CPU2? */
-    hwm_values.fans[1]         = 0; /* no CPU2 fan */
-    hwm_values.temperatures[0] = 0; /* unused */
-    hwm_values.temperatures[2] = 0; /* CPU2? */
-    /* no CPU2 voltage */
+    device_add(&w83781d_device);    /* fans: CPU1, CPU2, Thermal Control; temperatures: unused, CPU1, CPU2 */
+    hwm_values.voltages[1] = 3300; /* Seems to be the I/O voltage, reported as "CPUi/o" in the Leadtek BIOS and "CPU2" in the SuperMicro BIOS */
 
     return ret;
 }