diff --git a/doc/FAQ b/doc/FAQ
index e22d8f6c..7e0a04b2 100644
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -58,6 +58,7 @@ lm_sensors
4.4 How do those ALARMS work? The current value is within range but there is still an ALARM warning!
4.5 My voltage readings seem to drift a bit. Is something wrong?
4.6 Some measurements are way out of range. What happened?
+ 4.6.1 -5V and -12V readings are way out of range!
4.7 What are VID lines? Why is the VID reading wrong?
4.8 I read sensor values several times a second, but they are only updated only each second or so. Why?
4.9 It sometimes seems to take almost a second before I see the sensor reading results. Why?
@@ -676,6 +677,14 @@ non-standard way. You can use the configuration file to describe how
this measurement should be interpreted; see the comments the example
file for more information.
+4.6.1 -5V and -12V readings are way out of range!
+-------------------------------------------------
+
+It's very frequent that negative voltage lines are not wired because
+motherboard manufacturers don't think they're worth monitoring (they
+are mostly unused these days). You can just add `ignore inN' lines to
+`/etc/sensors.conf' to hide them.
+
4.7 What are VID lines? Why is the VID reading wrong?
=====================================================
@@ -687,6 +696,12 @@ the sensor chip, so the readings may be invalid. A reading of 0V,
settings for the Processor Core voltage (often in0_min and in0_max) in
that file so that they don't depend on vid.
+ The CPU nominal voltage is computed from VID lines according to a
+formula that depends on the CPU type. Most chips that report a VID
+value can be configured to use either VRM 8.2 (for Pentium III) or VRM
+9.0 (for Pentium 4 and Athlon). You chose which one you want through
+`/etc/sensors.conf'. See `doc/vid' for more information.
+
4.8 I read sensor values several times a second, but they are only updated only each second or so. Why?
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diff --git a/doc/lm_sensors-FAQ.html b/doc/lm_sensors-FAQ.html
index ff6df7e6..865b83b1 100644
--- a/doc/lm_sensors-FAQ.html
+++ b/doc/lm_sensors-FAQ.html
@@ -102,6 +102,9 @@ and
It's very frequent that negative voltage lines are not wired because +motherboard manufacturers don't think they're worth monitoring +(they are mostly unused these days). You can just add +ignore inN lines to /etc/sensors.conf to hide them. +