If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
12v jumping from 11.64 to 11.71
According to my motherboards' software overclocking utilty(Superstep) the
12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This is at idle. Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity 500W SLI.Video card is Nvidia 7900GS. I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. Is this normal fluctuation? |
#2
|
|||
|
|||
12v jumping from 11.64 to 11.71
'don't look' wrote:
| According to my motherboards' software overclocking utilty(Superstep) the | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This is | at idle. | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity 500W | SLI.Video card is Nvidia 7900GS. | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. | Is this normal fluctuation? _____ The ATX12V rev 2.2 power supply specifications call for +/- 5% regulation on the 12 VDC lines; anything within 11.40 VDC to 12.60 VDC is OK. See http://www.formfactors.org/developer...public_br2.pdf . 'Jumping' is not much of a description, and you haven't given any information about voltage behaviors when the system is NOT at idle. Always put ALL the information for a post in the body; don't place important bits just in the subject line. Phil Weldon http://www.formfactors.org/developer...public_br2.pdf "don't look" don't wrote in message ... | According to my motherboards' software overclocking utilty(Superstep) the | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This is | at idle. | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity 500W | SLI.Video card is Nvidia 7900GS. | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. | Is this normal fluctuation? | | |
#3
|
|||
|
|||
12v jumping from 11.64 to 11.71
"Phil Weldon" wrote in message link.net... 'don't look' wrote: | According to my motherboards' software overclocking utilty(Superstep) the | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This is | at idle. | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity 500W | SLI.Video card is Nvidia 7900GS. | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. | Is this normal fluctuation? _____ The ATX12V rev 2.2 power supply specifications call for +/- 5% regulation on the 12 VDC lines; anything within 11.40 VDC to 12.60 VDC is OK. See http://www.formfactors.org/developer...public_br2.pdf .. 'Jumping' is not much of a description, and you haven't given any information about voltage behaviors when the system is NOT at idle. Always put ALL the information for a post in the body; don't place important bits just in the subject line. Phil Weldon http://www.formfactors.org/developer...public_br2.pdf "don't look" don't wrote in message ... | According to my motherboards' software overclocking utilty(Superstep) the | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This is | at idle. | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity 500W | SLI.Video card is Nvidia 7900GS. | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. | Is this normal fluctuation? | | Sorry,.By "jumping"I meant every couple to several seconds the value switches from 11.64 to 11.71. I've never seen it higher than 11.71 or lower than 11.64. how do I tell the Voltage while running a program?Is there a utilty that will log it? |
#4
|
|||
|
|||
12v jumping from 11.64 to 11.71
'don't look' wrote:
| Sorry,.By "jumping"I meant every couple to several seconds the value | switches from 11.64 to 11.71. I've never seen it higher than 11.71 or lower | than 11.64. | how do I tell the Voltage while running a program?Is there a utilty that | will log it? _____ The EXTREMELY small voltages changes are completely meaningless for a 12 VDC output. The voltage is only changing over a range of 0.07 volts. The analog to digital conversion used by the monitoring chip probably makes that small a change just an LSB error (like rounding) and it may not be able to give an accurate reading in the hundredth's place. There are small applicatons that can monitor and log voltages, temperature, and fan speeds. Most can display values in the 'toolbar'. For that to happen, your particular motherboard must implement the necessary circuitry and you must find a monitoring application that is compatible with your motherboard. MotherBoard Monitor used to be the favorite, but it has not been updated and several years and no longer works on new motherboards with new monitoring chips. CPUCool and SpeedFan are two possibilities. Phil Weldon "don't look" don't wrote in message ... | | "Phil Weldon" wrote in message | link.net... | 'don't look' wrote: | | According to my motherboards' software overclocking utilty(Superstep) | the | | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This | is | | at idle. | | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity | 500W | | SLI.Video card is Nvidia 7900GS. | | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. | | Is this normal fluctuation? | _____ | | The ATX12V rev 2.2 power supply specifications call for +/- 5% regulation | on | the 12 VDC lines; anything within 11.40 VDC to 12.60 VDC is OK. See | http://www.formfactors.org/developer...public_br2.pdf | . | | 'Jumping' is not much of a description, and you haven't given any | information about voltage behaviors when the system is NOT at idle. | | Always put ALL the information for a post in the body; don't place | important | bits just in the subject line. | | Phil Weldon | | | http://www.formfactors.org/developer...public_br2.pdf | "don't look" don't wrote in message | ... | | According to my motherboards' software overclocking utilty(Superstep) | the | | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This | is | | at idle. | | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra X-finity | 500W | | SLI.Video card is Nvidia 7900GS. | | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to video. | | Is this normal fluctuation? | | | | | | | Sorry,.By "jumping"I meant every couple to several seconds the value | switches from 11.64 to 11.71. I've never seen it higher than 11.71 or lower | than 11.64. | how do I tell the Voltage while running a program?Is there a utilty that | will log it? | | |
#5
|
|||
|
|||
12v jumping from 11.64 to 11.71
Phil Weldon wrote:
'don't look' wrote: | Sorry,.By "jumping"I meant every couple to several seconds the value | switches from 11.64 to 11.71. I've never seen it higher than 11.71 | or lower | than 11.64. | how do I tell the Voltage while running a program?Is there a utilty | that will log it? _____ The EXTREMELY small voltages changes are completely meaningless for a 12 VDC output. The voltage is only changing over a range of 0.07 volts. The analog to digital conversion used by the monitoring chip probably makes that small a change just an LSB error (like rounding) and it may not be able to give an accurate reading in the hundredth's place. From a data acquisition standpoint, think about the analog to digital conversion. These things can't be 100% accurate. If the voltage took an analog waveform, it would be 100% continuous, meaning infinite differences between readings. So it would say 11.644293865 one second then 11.641232398235 to infinity digits (theoretically). Since we're dealing with digital systems, the data acquisition bit of the computer has to separate the readings in terms of time and levels. We'll deal with the levels first. Let's say that the voltage sensor is a +20V sensor with 8-bit resolution. 8 bits means you have 2^8 levels, or a total of 256 different levels to state what a typical analog reading would "fit" in. The computer can't see any more detail than that. 20V/256 different levels=.078V which means that if your voltage is hovering around 11.64, it would have a whole .078 of "play" before the signal integration system would be able to assign it to a different number. The computer would be assigning anything in the range of 11.60V to 11.67V the value "11.64V" because it's the computer's best guess at what the voltage is, since it can't see more resolution. Correspondingly, if it exceeds 11.67V and fits in the range of 11.67V to 11.75V then it will assign the value "11.71V." If it's hard to see, open up Speedfan and watch your temperatures over time. You'll notice that you won't see tenths of a degree... you'll see half a degree resolution at most, but what happens in between those hills and valleys? You can use your eyes to visually integrate the signal over time, or if you're really anal, import it into Excel and do some curve fitting to figure it out. As you can see, your 12V rail might be moving around up to .13V, but that's well within the spec. You're good. -- Phil There are small applicatons that can monitor and log voltages, temperature, and fan speeds. Most can display values in the 'toolbar'. For that to happen, your particular motherboard must implement the necessary circuitry and you must find a monitoring application that is compatible with your motherboard. MotherBoard Monitor used to be the favorite, but it has not been updated and several years and no longer works on new motherboards with new monitoring chips. CPUCool and SpeedFan are two possibilities. Phil Weldon "don't look" don't wrote in message ... | | "Phil Weldon" wrote in message | link.net... | 'don't look' wrote: | | According to my motherboards' software overclocking | | utilty(Superstep) | the | | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This | is | | at idle. | | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra | | X-finity | 500W | | SLI.Video card is Nvidia 7900GS. | | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to | | video. Is this normal fluctuation? | _____ | | The ATX12V rev 2.2 power supply specifications call for +/- 5% regulation | on | the 12 VDC lines; anything within 11.40 VDC to 12.60 VDC is OK. | See | http://www.formfactors.org/developer...public_br2.pdf | . | | 'Jumping' is not much of a description, and you haven't given any | information about voltage behaviors when the system is NOT at | idle. | | Always put ALL the information for a post in the body; don't place | important | bits just in the subject line. | | Phil Weldon | | | http://www.formfactors.org/developer...public_br2.pdf | "don't look" don't wrote in message | ... | | According to my motherboards' software overclocking | | utilty(Superstep) | the | | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This | is | | at idle. | | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra | | X-finity | 500W | | SLI.Video card is Nvidia 7900GS. | | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to | | video. Is this normal fluctuation? | | | | | | | Sorry,.By "jumping"I meant every couple to several seconds the value | switches from 11.64 to 11.71. I've never seen it higher than 11.71 | or lower | than 11.64. | how do I tell the Voltage while running a program?Is there a utilty | that will log it? |
#6
|
|||
|
|||
12v jumping from 11.64 to 11.71
"Phil, Non-Squid" wrote in message ... Phil Weldon wrote: 'don't look' wrote: | Sorry,.By "jumping"I meant every couple to several seconds the value | switches from 11.64 to 11.71. I've never seen it higher than 11.71 | or lower | than 11.64. | how do I tell the Voltage while running a program?Is there a utilty | that will log it? _____ The EXTREMELY small voltages changes are completely meaningless for a 12 VDC output. The voltage is only changing over a range of 0.07 volts. The analog to digital conversion used by the monitoring chip probably makes that small a change just an LSB error (like rounding) and it may not be able to give an accurate reading in the hundredth's place. From a data acquisition standpoint, think about the analog to digital conversion. These things can't be 100% accurate. If the voltage took an analog waveform, it would be 100% continuous, meaning infinite differences between readings. So it would say 11.644293865 one second then 11.641232398235 to infinity digits (theoretically). Since we're dealing with digital systems, the data acquisition bit of the computer has to separate the readings in terms of time and levels. We'll deal with the levels first. Let's say that the voltage sensor is a +20V sensor with 8-bit resolution. 8 bits means you have 2^8 levels, or a total of 256 different levels to state what a typical analog reading would "fit" in. The computer can't see any more detail than that. 20V/256 different levels=.078V which means that if your voltage is hovering around 11.64, it would have a whole .078 of "play" before the signal integration system would be able to assign it to a different number. The computer would be assigning anything in the range of 11.60V to 11.67V the value "11.64V" because it's the computer's best guess at what the voltage is, since it can't see more resolution. Correspondingly, if it exceeds 11.67V and fits in the range of 11.67V to 11.75V then it will assign the value "11.71V." If it's hard to see, open up Speedfan and watch your temperatures over time. You'll notice that you won't see tenths of a degree... you'll see half a degree resolution at most, but what happens in between those hills and valleys? You can use your eyes to visually integrate the signal over time, or if you're really anal, import it into Excel and do some curve fitting to figure it out. As you can see, your 12V rail might be moving around up to .13V, but that's well within the spec. You're good. -- Phil There are small applicatons that can monitor and log voltages, temperature, and fan speeds. Most can display values in the 'toolbar'. For that to happen, your particular motherboard must implement the necessary circuitry and you must find a monitoring application that is compatible with your motherboard. MotherBoard Monitor used to be the favorite, but it has not been updated and several years and no longer works on new motherboards with new monitoring chips. CPUCool and SpeedFan are two possibilities. Phil Weldon "don't look" don't wrote in message ... | | "Phil Weldon" wrote in message | link.net... | 'don't look' wrote: | | According to my motherboards' software overclocking | | utilty(Superstep) | the | | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This | is | | at idle. | | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra | | X-finity | 500W | | SLI.Video card is Nvidia 7900GS. | | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to | | video. Is this normal fluctuation? | _____ | | The ATX12V rev 2.2 power supply specifications call for +/- 5% regulation | on | the 12 VDC lines; anything within 11.40 VDC to 12.60 VDC is OK. | See | http://www.formfactors.org/developer...public_br2.pdf | . | | 'Jumping' is not much of a description, and you haven't given any | information about voltage behaviors when the system is NOT at | idle. | | Always put ALL the information for a post in the body; don't place | important | bits just in the subject line. | | Phil Weldon | | | http://www.formfactors.org/developer...public_br2.pdf | "don't look" don't wrote in message | ... | | According to my motherboards' software overclocking | | utilty(Superstep) | the | | 12V line doesn't look good.All the others(3,3v,5v) etc. are stable.This | is | | at idle. | | Mobo is Winfast NF4UKAA-8EKRS w/2gb ddr.Power supply is Ultra | | X-finity | 500W | | SLI.Video card is Nvidia 7900GS. | | I have 24 pin to motherboard plus 4-pin to cpu plus 6 pin to | | video. Is this normal fluctuation? | | | | | | | Sorry,.By "jumping"I meant every couple to several seconds the value | switches from 11.64 to 11.71. I've never seen it higher than 11.71 | or lower | than 11.64. | how do I tell the Voltage while running a program?Is there a utilty | that will log it? Thanks,good info.Not that I'm worried about it.I just notice these things and get curious. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Jumping off the Intel ship. | Al Brumski | Overclocking AMD Processors | 4 | May 5th 06 04:14 PM |
Mouse pointer jumping | Colin D | Asus Motherboards | 4 | December 4th 04 07:03 AM |
Jumping MP3's Please help !!!! | James | Cdr | 2 | December 3rd 03 01:54 PM |
Jumping ship from nVidia - need some advice | sb | Ati Videocards | 7 | October 12th 03 06:33 AM |
Jumping the gun folks | john dobbs | Nvidia Videocards | 6 | September 19th 03 05:47 PM |