On Tue, 2008-04-22 at 10:38 -0600, Robin Laing wrote: > First, don't fully trust the voltages provided by the motherboard. If > you need accurate voltages, you have to adjust (Calibrate) the voltages > to an accurate reading. I ran through this with two power supplies that > the MB said were good but had 5V rails that were .5 volts low. One DVD > burner later I found out. > > Install lm-sensors and either ksensors or gnome-applet-sensors. You can > adjust the accuracy of the sensors by playing with the configuration files. > > http://www.lm-sensors.org/ Though you need something accurate to calibrate against... The power supply is internally regulated. If it's set to provide 5 Volts from its output terminals, that's what it does. However, if there's a drop across the wiring and there's less than 5 Volts at the motherboard, the power supply will not know about it. It doesn't sense at that point of the circuit. I don't know if it's still the case, but some computer supplies only really regulated some of the voltages. e.g. It'd keep the 5 Volts at 5 Volts, but the 12 Volt supplies were less controlled. Since some supplies were derived from a common source, it's presumed that adjusting one keeps the rest in step, but that doesn't always happen in practice. Some motherboards may have voltage regulators on the board, but that could only help against too much voltage, they can't increase supply of what's not there. -- (This computer runs FC7, my others run FC4, FC5 & FC6, in case that's important to the thread.) Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
