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I've installed a Pentium 4 3.06ghz cpu into a asus P5VD2 - VM SE mother board all is fine until i get a 'cpu over voltage error'.
When i try to change the values in bios they are locked at zero with an option to disable it but it cant be changed
is there a possibility that the motherboard might be faulty?
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You have installed the CPU yourself. Was it new or from another computer? If the latter, did you replace the thermal compound between the chip and the heatsink?
If you know the model of the CPU, look up "CPU compatibility chart" at Asus for your motherboard and check it is compatible.
The motherboard may be using settings for the previous CPU. (Did you replace the old one?) It may require you to "Clear the CMOS", look up how to do that in your motherboard manual.
One doesn't need an operating system in order to access or update the BIOS. Let's do this for starters - when starting the machine, tap the delete key intermittently. This will put you into the BIOS or Setup. Do not make any changes but please write down the BIOS revision information and then hit F10 to exit. Please do not make any other changes at this point in time. If you will post back with this information, further instruction will be provided.
Edit: Also, please ID your processor with a little more detail and cross reference it against this list.
Last edited by Rockster2U; 12th January 2009 at 04:46.
OK, as you have probably already determined yourself, there is no need to update your BIOS. The fact that you can't change the referenced values and make those changes stick is troubling indeed. Absent any kind of auto setting which over-rides the change you are trying to make, I would RMA the board unless its only a nuisance. Perhaps there is another setting which won't allow you to disable this but I'm at a loss.
I don't know Intel as well as I should but if it were my board, I'd be investigating any auto settings related to the CPU and/or perhaps any spread spectrum settings. I'd also encourage you to look at any of the ASUS forums.
Here's a few pertinent words out of Wikipedia as they may relate to an answer.
Spread-spectrum clocking distributes the energy so that it falls into a large number of the receiver's frequency bands, without putting enough energy into any one band to exceed the statutory limits. The usefulness of spread-spectrum clocking as a method of actually reducing interference is often debated, but it is probable that some electronic equipment with sensitivity to a narrow band of frequencies will experience less interference, while other equipment with broadband sensitivity will experience more interference.
FCC certification testing is often completed with the spread-spectrum function enabled in order to reduce the measured emissions to within acceptable legal limits. However, some BIOS writers include the ability to disable spread-spectrum clock generation as a user setting, thereby defeating the object of the EMI regulations. This may be considered a loophole, but is generally overlooked as long as the default BIOS setting provided by the manufacturer has the spread-spectrum feature enabled. An ability to disable spread-spectrum clocking for computer systems is considered useful as the spread-spectrum techniques used can affect the maximum clockspeed achievable by the components involved due to clock skew, affecting overclocking efforts.
My question was more related to general power handling in the sense of the mobo controlling power to devices or devices in use by port configuration. I was just suspicious if this was over-riding normal simultaneous power distribution. I think not. And, most boards might not even have this setting available to the user.
Matt's thought of clearing CMOS is a good idea and its certainly not going to hurt anything as long as you are familiar with your BIOS settings and can reset them accordingly. Disconnect your main power header at the motherboard and move your CMOS jumper from pins 1&2 to pins 3&4, wait about 10 seconds and re-jumper 1&2, hook your 20 or 24 pin power connector back to your motherboard and restart. boot into your BIOS, reset everything and see if you can get those problem settings to change or hold.
