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Question about temp and fan speed
Hi,
This is my first question to this group, hope I include all the needed info about my equipment to get your help. My questions are related to fan speeds and CPU/MoBo temperatures. I know all fans are running by viewing them and air flow feel. I wonder if the CPU might run cooler if the rear fan ran faster (there are no adjustments). Is the CPU at an expected temperature for a C2D? Also, since the front fan is actually running, I assume the temp sensor is open (see data below). Does anyone know how to determine this? I know the mobo plugs are in but the fan connections are not visible. Does anyone know what the resistance should be on the fan leads? I don't have an appropriate fan for substitution. My setup at this point has: ASUS P5B-E motherboard Intel Core 2 Duo E6400 2.13GHz Dual 1 GB PC6400 DDR2 ram NVidia 256MB GeForce 7300GT PCI-E video Enermax 420W EG425P-VESFMA power supply A floppy 2 hard disks 1 CD-RW optical drive CoolerMaster Centurian CAC-T05-UB case The motherboard voltages, temperatures and speeds as follows: Vcore = 1.12v +3.3 = 3.28v +5 = 5.15v +12 = 12.14v CPU = 40 to 45 c Motherboard = 30 to 38 c Rear fan = 746 rpm Front fan = 0 rpm Power = 1530 to 1591 rpm All these reading are for a quite more-or-less quiescent idling over an hour or two. Thanks for any suggestions or information. Ray |
#2
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Question about temp and fan speed
On Tue, 14 Nov 2006 18:24:02 GMT, "News Grouips"
wrote: My questions are related to fan speeds and CPU/MoBo temperatures. Check/browse my site a bit .... -- Regards , SPAJKY ® mail addr. @ my site @ http://www.spajky.vze.com 4y - "Tualatin OC-ed / BX-Slot1 / inaudible setup!" |
#3
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Question about temp and fan speed
News Grouips wrote:
Hi, This is my first question to this group, hope I include all the needed info about my equipment to get your help. My questions are related to fan speeds and CPU/MoBo temperatures. I know all fans are running by viewing them and air flow feel. I wonder if the CPU might run cooler if the rear fan ran faster (there are no adjustments). Is the CPU at an expected temperature for a C2D? Also, since the front fan is actually running, I assume the temp sensor is open (see data below). Does anyone know how to determine this? I know the mobo plugs are in but the fan connections are not visible. Does anyone know what the resistance should be on the fan leads? I don't have an appropriate fan for substitution. My setup at this point has: ASUS P5B-E motherboard Intel Core 2 Duo E6400 2.13GHz Dual 1 GB PC6400 DDR2 ram NVidia 256MB GeForce 7300GT PCI-E video Enermax 420W EG425P-VESFMA power supply A floppy 2 hard disks 1 CD-RW optical drive CoolerMaster Centurian CAC-T05-UB case The motherboard voltages, temperatures and speeds as follows: Vcore = 1.12v +3.3 = 3.28v +5 = 5.15v +12 = 12.14v CPU = 40 to 45 c Motherboard = 30 to 38 c Rear fan = 746 rpm Front fan = 0 rpm Power = 1530 to 1591 rpm All these reading are for a quite more-or-less quiescent idling over an hour or two. Thanks for any suggestions or information. Ray If you are worried about fan RPMs, not all fans have an RPM signal. There are two types of fans. A fan with three wires (+12V, GND, RPM) has an RPM signal. A fan with two wires (+12V, GND) has no RPM signal. Many computer case fans are the two wire variety (because it is a few cents cheaper to make). That is why not all the case fans may report their RPMs. Your temperatures are not all that out of the ordinary. You need to load up your processor cores, with some 100% CPU loading programs, and measure the temperatures again. Then post back with the results of your testing. Paul |
#4
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Question about temp and fan speed
"Paul" wrote in message
... News Grouips wrote: Hi, This is my first question to this group, hope I include all the needed info about my equipment to get your help. My questions are related to fan speeds and CPU/MoBo temperatures. I know all fans are running by viewing them and air flow feel. I wonder if the CPU might run cooler if the rear fan ran faster (there are no adjustments). Is the CPU at an expected temperature for a C2D? Also, since the front fan is actually running, I assume the temp sensor is open (see data below). Does anyone know how to determine this? I know the mobo plugs are in but the fan connections are not visible. Does anyone know what the resistance should be on the fan leads? I don't have an appropriate fan for substitution. My setup at this point has: ASUS P5B-E motherboard Intel Core 2 Duo E6400 2.13GHz Dual 1 GB PC6400 DDR2 ram NVidia 256MB GeForce 7300GT PCI-E video Enermax 420W EG425P-VESFMA power supply A floppy 2 hard disks 1 CD-RW optical drive CoolerMaster Centurian CAC-T05-UB case The motherboard voltages, temperatures and speeds as follows: Vcore = 1.12v +3.3 = 3.28v +5 = 5.15v +12 = 12.14v CPU = 40 to 45 c Motherboard = 30 to 38 c Rear fan = 746 rpm Front fan = 0 rpm Power = 1530 to 1591 rpm All these reading are for a quite more-or-less quiescent idling over an hour or two. Thanks for any suggestions or information. Ray If you are worried about fan RPMs, not all fans have an RPM signal. There are two types of fans. A fan with three wires (+12V, GND, RPM) has an RPM signal. A fan with two wires (+12V, GND) has no RPM signal. Many computer case fans are the two wire variety (because it is a few cents cheaper to make). That is why not all the case fans may report their RPMs. Your temperatures are not all that out of the ordinary. You need to load up your processor cores, with some 100% CPU loading programs, and measure the temperatures again. Then post back with the results of your testing. Paul Thanks for your reply. Yes, both of my fans provide rpm monitoring. The back fan originally read in the 1200 rpms then it went to the 700's. At this moment it is back to a reading of 1240 rpm. The front fan originally read about 1200 then went to 0 and then back to around 1200 again for a while. It now reads 0 again. I don't know if the fan sensors, the wiring, the monitor or software is at fault. My concern is that the fan monitors are no help in monitoring computer health - they can't be trusted. If someone has some experience in this type of problem, maybe with this same case and fans, perhaps I can learn an easy way to fix the problem without just tearing out the fans or ignoring them. Yes, I will monitor the CPU temp under load but I was trying to resolve this question before I did anything else. Under limited testing so far I have not seen a CPU temp over about 46 c. I'm not into game playing so don't expect too much loading. Ray |
#5
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Question about temp and fan speed
News Grouips wrote:
Thanks for your reply. Yes, both of my fans provide rpm monitoring. The back fan originally read in the 1200 rpms then it went to the 700's. At this moment it is back to a reading of 1240 rpm. The front fan originally read about 1200 then went to 0 and then back to around 1200 again for a while. It now reads 0 again. I don't know if the fan sensors, the wiring, the monitor or software is at fault. My concern is that the fan monitors are no help in monitoring computer health - they can't be trusted. If someone has some experience in this type of problem, maybe with this same case and fans, perhaps I can learn an easy way to fix the problem without just tearing out the fans or ignoring them. Yes, I will monitor the CPU temp under load but I was trying to resolve this question before I did anything else. Under limited testing so far I have not seen a CPU temp over about 46 c. I'm not into game playing so don't expect too much loading. Ray OK. In fact there is no need to panic. This is actually quite normal. The monitor chip has a minimum speed it can measure. Let us say it is 600RPM. If the fan was running at 601 RPM, we would see 601 on the display. If the fan dropped to 599 RPM, the display will read 0. The reason for this, has to do with the overflow of a counter in the monitor chip. Some of the third party tools, like Speedfan (almico.com), have an option to adjust a divider in the monitor chip. The divider feeds the fan monitor. Depending on whether the divider is set to x2, x4, x8 and so on, that changes the minimum fan reading. The minimum speed might be 1800RPM, 900RPM, 450RPM, in response to changing the monitor divider. Some BIOS are pretty stupid, and set the divider such that the fan speed minimum is quite high. That increases the odds that the fan will read zero, and alarm during POST. I have a P4 motherboard that does that. My power supply fan is monitored. The power supply fan starts at below 1800RPM. That trips up the BIOS when the computer starts. I have to press F1, before I can finish booting the computer. Once the power supply heats up a bit, the fan runs above 1800 RPM and there are no further problems. So, the answer to your monitoring problem, can be to use Speedfan or a similar program. The motherboard maker may provide a fan speed monitor program. The BIOS may have an option to set the divider (unlikely, but we can still hope). What you are seeing is a "normal annoyance". Now, assuming the minimum is being met, the next question is whether the speed variation you are seeing, actually correlates with what the fan is doing. If the "sound" from the fan is at a constant speed, and you see the display dip from 1200 to 700, or read 63000, then that is a problem. On older motherboards, two fan monitoring programs could fight over the SMBUS, and when one program attempts to take a reading from the monitor chip, it can upset the other program. That leads to garbage data. I've stopped seeing those kinds of complaints, because I think the monitor chips are no longer on the SMBUS. You can also occasionally have a hardware failure, like a bad signal from the fan to the motherboard. So, play around with Speedfan a bit, and see if the results are more reasonable. I cannot remember which program does it, but one of the third party programs is smart enough to "auto adjust" the divider, until the fan reading is within measurement range. The author of that program, knows his stuff. The other utility writers should be shot, for using a fixed value, and not hiding the details of this issue from the end user. With properly written software or BIOS firmware, the fan should always be readable. I think there is enough dynamic range in the monitor chip, for everything except the slowest of fans. I had some fun with those programs, he http://groups.google.ca/group/alt.co...bae4450470898d Paul |
#6
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Question about temp and fan speed
"Paul" wrote in message ... News Grouips wrote: Thanks for your reply. Yes, both of my fans provide rpm monitoring. The back fan originally read in the 1200 rpms then it went to the 700's. At this moment it is back to a reading of 1240 rpm. The front fan originally read about 1200 then went to 0 and then back to around 1200 again for a while. It now reads 0 again. I don't know if the fan sensors, the wiring, the monitor or software is at fault. My concern is that the fan monitors are no help in monitoring computer health - they can't be trusted. If someone has some experience in this type of problem, maybe with this same case and fans, perhaps I can learn an easy way to fix the problem without just tearing out the fans or ignoring them. Yes, I will monitor the CPU temp under load but I was trying to resolve this question before I did anything else. Under limited testing so far I have not seen a CPU temp over about 46 c. I'm not into game playing so don't expect too much loading. Ray OK. In fact there is no need to panic. This is actually quite normal. The monitor chip has a minimum speed it can measure. Let us say it is 600RPM. If the fan was running at 601 RPM, we would see 601 on the display. If the fan dropped to 599 RPM, the display will read 0. The reason for this, has to do with the overflow of a counter in the monitor chip. Some of the third party tools, like Speedfan (almico.com), have an option to adjust a divider in the monitor chip. The divider feeds the fan monitor. Depending on whether the divider is set to x2, x4, x8 and so on, that changes the minimum fan reading. The minimum speed might be 1800RPM, 900RPM, 450RPM, in response to changing the monitor divider. Some BIOS are pretty stupid, and set the divider such that the fan speed minimum is quite high. That increases the odds that the fan will read zero, and alarm during POST. I have a P4 motherboard that does that. My power supply fan is monitored. The power supply fan starts at below 1800RPM. That trips up the BIOS when the computer starts. I have to press F1, before I can finish booting the computer. Once the power supply heats up a bit, the fan runs above 1800 RPM and there are no further problems. So, the answer to your monitoring problem, can be to use Speedfan or a similar program. The motherboard maker may provide a fan speed monitor program. The BIOS may have an option to set the divider (unlikely, but we can still hope). What you are seeing is a "normal annoyance". Now, assuming the minimum is being met, the next question is whether the speed variation you are seeing, actually correlates with what the fan is doing. If the "sound" from the fan is at a constant speed, and you see the display dip from 1200 to 700, or read 63000, then that is a problem. On older motherboards, two fan monitoring programs could fight over the SMBUS, and when one program attempts to take a reading from the monitor chip, it can upset the other program. That leads to garbage data. I've stopped seeing those kinds of complaints, because I think the monitor chips are no longer on the SMBUS. You can also occasionally have a hardware failure, like a bad signal from the fan to the motherboard. So, play around with Speedfan a bit, and see if the results are more reasonable. I cannot remember which program does it, but one of the third party programs is smart enough to "auto adjust" the divider, until the fan reading is within measurement range. The author of that program, knows his stuff. The other utility writers should be shot, for using a fixed value, and not hiding the details of this issue from the end user. With properly written software or BIOS firmware, the fan should always be readable. I think there is enough dynamic range in the monitor chip, for everything except the slowest of fans. I had some fun with those programs, he http://groups.google.ca/group/alt.co...browse_frm/thr ead/f943fc7a3a12fa97/b0bae4450470898d Paul Thanks very much for the information. It may be why sometimes I get a 0 reading all the time for one fan. One fan monitor reads low (700s) most of the time and then sometimes it starts higher (1200s) or at 0. The monitor shows the rpms even when it is lower than the Probe II minimum of 800. There is no provision for changing the minimums in Probe II or my BIOS. When the monitor's value changes I have not been able to feel or hear any difference in the actual fans. Seems that what ever the actual speeds are the CPU is always ok. I will get Speedfan and try it. I also will read your reference URL info. Thanks Paul. Ray |
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