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#1
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Negative voltages
I've recently built a new Pentium 4 system and have hooked it up to
Motherboard Monitor just to keep an eye on the temps, fans and voltages whilst it burns in. I notice MBM defaults to displaying your -5v and -12v lines, and displays mine as running at c. -2.8v and -8.2v. My question is, are these rails used for anything anymore, and if so why are mine showing such big variances? Indeed, in what situation does any device require a negative voltage? Last question - I know it's possible to monitor your Vcore voltge and Core 1, which is currently reading my memory voltage supply, but does anyone know of a way to monitor the AGP voltage. I using an Abit IC7 for what it's worth. Cheers |
#2
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Somone with more knowledge will probably answer, but in the meantime, I
think MBM makes a guess at each display, and you can go into the settings and hunt for the proper sensor that matches. I have one fan it can't display properly at all. Can't go look at it as I'm booted to a clean install I haven't built up yet. -- Ed Light Smiley :-/ MS Smiley :-\ |
#3
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Seeing as you didn't quote the OP [and x-posted, to a totally irrellevent
group I might add (maybe you were not paying attn, as I've done before...not casting stones)], I'm sure the masses will, totally benefit (sarcasm). Much less, I'm sure someone will be able to offer a better answer, when they can't even see the original post. Just an FYI, Ed...not everyone has 500year retention on their news servers. Some people don't even have 3 days. Learn to quote. Or, are you too lazy to do such? www.usenet.org - Ed Light stood up, at show-n-tell, and said: Somone with more knowledge will probably answer, but in the meantime, I think MBM makes a guess at each display, and you can go into the settings and hunt for the proper sensor that matches. I have one fan it can't display properly at all. Can't go look at it as I'm booted to a clean install I haven't built up yet. -- Strontium "Shortcuts are self-defeating. Mean. If you cannot do it, clean, you'll never reach your reward..." - 311 |
#4
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Use the program, that came with the motherboard. MBM is not, yet, up to
par with P4 motherboards. I used MBM, for years, with AMD based boards. They need time to figure out the new P4 boards. - Gilligan Monger stood up, at show-n-tell, and said: I've recently built a new Pentium 4 system and have hooked it up to Motherboard Monitor just to keep an eye on the temps, fans and voltages whilst it burns in. I notice MBM defaults to displaying your -5v and -12v lines, and displays mine as running at c. -2.8v and -8.2v. My question is, are these rails used for anything anymore, and if so why are mine showing such big variances? Indeed, in what situation does any device require a negative voltage? Last question - I know it's possible to monitor your Vcore voltge and Core 1, which is currently reading my memory voltage supply, but does anyone know of a way to monitor the AGP voltage. I using an Abit IC7 for what it's worth. Cheers -- Strontium "Shortcuts are self-defeating. Mean. If you cannot do it, clean, you'll never reach your reward..." - 311 |
#5
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"Gilligan Monger" wrote in message
. au... I've recently built a new Pentium 4 system and have hooked it up to Motherboard Monitor just to keep an eye on the temps, fans and voltages whilst it burns in. I notice MBM defaults to displaying your -5v and -12v lines, and displays mine as running at c. -2.8v and -8.2v. My question is, are these rails used for anything anymore, and if so why are mine showing such big variances? Indeed, in what situation does any device require a negative voltage? Last question - I know it's possible to monitor your Vcore voltge and Core 1, which is currently reading my memory voltage supply, but does anyone know of a way to monitor the AGP voltage. I using an Abit IC7 for what it's worth. MBM (and Speedfan) frequently misinterpret voltage and temp readings. Check in the BIOS and compare. AFAIK -5V is not used by any device, -12V is used by the serial ports only and as far as they are concerned anything between -5 and -15V will do. I don't know of any mobo that monitors the AGP supply line. With all the oveclocking and overrunning maybe its time the mobo makers considered it. |
#6
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"Gilligan Monger" wrote in message . au... I've recently built a new Pentium 4 system and have hooked it up to Motherboard Monitor just to keep an eye on the temps, fans and voltages whilst it burns in. I notice MBM defaults to displaying your -5v and -12v lines, and displays mine as running at c. -2.8v and -8.2v. My question is, are these rails used for anything anymore, and if so why are mine showing such big variances? Indeed, in what situation does any device require a negative voltage? Last question - I know it's possible to monitor your Vcore voltge and Core 1, which is currently reading my memory voltage supply, but does anyone know of a way to monitor the AGP voltage. I using an Abit IC7 for what it's worth. Cheers As per THG the -5v and -12v aren't used anymore though I found errors with THG articles. There's a link off MBM5 to take you to the MBM5 forum website. MBM's author Alex Van Kaam should be able to answer your questions about voltages. |
#7
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In the latest specs the -5 is optional, while the -12 is usually used
just for serial ports. However, some analog sound uses +/- 12. "jaster" wrote in message .. . "Gilligan Monger" wrote in message . au... I've recently built a new Pentium 4 system and have hooked it up to Motherboard Monitor just to keep an eye on the temps, fans and voltages whilst it burns in. I notice MBM defaults to displaying your -5v and -12v lines, and displays mine as running at c. -2.8v and -8.2v. My question is, are these rails used for anything anymore, and if so why are mine showing such big variances? Indeed, in what situation does any device require a negative voltage? Last question - I know it's possible to monitor your Vcore voltge and Core 1, which is currently reading my memory voltage supply, but does anyone know of a way to monitor the AGP voltage. I using an Abit IC7 for what it's worth. Cheers As per THG the -5v and -12v aren't used anymore though I found errors with THG articles. There's a link off MBM5 to take you to the MBM5 forum website. MBM's author Alex Van Kaam should be able to answer your questions about voltages. |
#8
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To clarify RS232 is a bipolar signal. From the specs.
Signal State Voltage Assignments - Voltages of -3v to -25v with respect to signal ground (pin 7) are considered logic '1' (the marking condition), whereas voltages of +3v to +25v are considered logic '0' (the spacing condition). The range of voltages between -3v and +3v is considered a transition region for which a signal state is not assigned. As you can see it requires both + and - voltages. Normally in PCs +/- 12 volts is used. "jaster" wrote in message ... You might be correct about the serial ports. But I couldn't find an ATX power consumption chart that includes -5.5v or -12v calculations. RS-232 specs require -3v to 15v to power the serial ports. The ATX12V (2.03) specs eliminated the -5.5v rail and only specifies 0.8amp on the -12v rail. So you're probably right about the serial port. "Pen" wrote in message .. . In the latest specs the -5 is optional, while the -12 is usually used just for serial ports. However, some analog sound uses +/- 12. "jaster" wrote in message .. . "Gilligan Monger" wrote in message . au... I've recently built a new Pentium 4 system and have hooked it up to Motherboard Monitor just to keep an eye on the temps, fans and voltages whilst it burns in. I notice MBM defaults to displaying your -5v and -12v lines, and displays mine as running at c. -2.8v and -8.2v. My question is, are these rails used for anything anymore, and if so why are mine showing such big variances? Indeed, in what situation does any device require a negative voltage? Last question - I know it's possible to monitor your Vcore voltge and Core 1, which is currently reading my memory voltage supply, but does anyone know of a way to monitor the AGP voltage. I using an Abit IC7 for what it's worth. Cheers As per THG the -5v and -12v aren't used anymore though I found errors with THG articles. There's a link off MBM5 to take you to the MBM5 forum website. MBM's author Alex Van Kaam should be able to answer your questions about voltages. |
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