CPU temp.....

U

u.k.man

New Member
Hi all, I have just built my first PC! It was challenging but I got there ,however......
everything booted up like a dream etc and at this moment in time I haven't even installed my Windows XP yet! :eek:
I have a Sempron 2.8 CPU and I have been told they can get really hot etc...
the question is....
What is the normal temp Sempron CPU's normally run at?
What's the rough temp of CPU when PC is idle? and...
What's the rough temp when the PC is gaming,big load etc?
The reason I am asking the above is because I had a peek under System Hardware Monitor as follows:
CPU ucore voltage 1.680v
DDR memory voltage 2.560v
CHS fan speed 0 RPM
CPU fan speed 4218 RPM
CPU Temperature 50C/122F
PS I had been running system for about 2 hours to get this reading.Also why does CHS fan speed say 0 RPM? Should I be using this with a fan? What does CHS mean? I have two case fans,the cpu has its own heatsink/fan and the PSU fan are all operational and working fine! Any info would be great,thanks :)
 
That does seem very high. Are you using stock HSF and did you apply any thermal paste(AS5)? I think CHS stands for Chassis(it says 0 because you probably don't have a fan connected to the CHS header), you should be able to connect a fan to it. What size are your case fans and which are intake/exhaust?
 
The max temp on any AMD 64bit model cpu is 70C. The stock HSF comes with a thermal pad(preformed thermal paste) already. If you didn't seat it down fully then you could expect a higher then norm operating temp of 42-46C. To monitor temps and fan speeds you can grab a free utlity call SpeedFan at http://www.almico.com/sfdownload.php

When gaming with the stock heat sink/fan combination you would normally see the cpu temp up around 50C. If you want ideal temps as seen on gaming machines you would go with a custom cpu cooler and larger case fans or even a liquid cooled setup. There are also air conditioned cases available. The best temps for gaming and OCing alike are the lowest.
 
Yasu said:
That does seem very high. Are you using stock HSF and did you apply any thermal paste(AS5)? I think CHS stands for Chassis(it says 0 because you probably don't have a fan connected to the CHS header), you should be able to connect a fan to it. What size are your case fans and which are intake/exhaust?
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What do you mean by stock HSF? I have a Coolermaster CP5-6J31C Socket A Up to XP3000 and Sempron 3100+ AMD Approved Cooler. if that helps ;)
It's a heatsink/fan with it's own thermal pad so I didn't apply any thermal paste.
At the front of case I have an intake fan 80mm and an exhaust fan 90mm at the back.
 
HSF is an abbreviation for what we have been discussing namely (H)eat (S)ink/(F)an combination. One thing that will see temps rise fast on a new build is the lack of an OS where Windows keeps the cpu in an idle mode. Without an OS installed there is nothing to keep the cpu busy leaving it to throttle full speed. After you get Windows on take a look at the temps again to see the difference. If you are still seeing high temps while no loads have been placed on the cpu then you would have to reseat the processor with some Artic Silver or another quality brand of thermal compound. First get Windows up and running to have the system in it's normal operating environment.
 
PC eye said:
HSF is an abbreviation for what we have been discussing namely (H)eat (S)ink/(F)an combination. One thing that will see temps rise fast on a new build is the lack of an OS where Windows keeps the cpu in an idle mode. Without an OS installed there is nothing to keep the cpu busy leaving it to throttle full speed. After you get Windows on take a look at the temps again to see the difference. If you are still seeing high temps while no loads have been placed on the cpu then you would have to reseat the processor with some Artic Silver or another quality brand of thermal compound. First get Windows up and running to have the system in it's normal operating environment.
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Hi PC eye, or anyone that can add to this will be great...
I have installed Windows XP like you said PC eye and I checked bios for CPU temp at 6.36PM and it said 36c-37c at startup(cold boot)
At 10.01PM I checked bios again and it said 47c-48c...
I put on Speedfan that I see in one of your posts and this what it read,as follows:
Fan1:4116 RPM Temp1:47c
Fan2:0 RPM Temp2:127c
Fan3:0 RPM Temp3:21c-51c(fluctuating)
HDO: 27c
PS What does all this mean? Temp2 and Temp3 doesn't seem realistic.What do you think? Thanks by the way
 
Since you still have the stock heat sink/fan combo the cpu temp is within the normal range there. Currently here the cpu shows 52C idle with temp #1. Temp #2 also related to the cpu shows 27C. The first is the one to go by. When you see a super high temp it is often due to not having a sensor on the board itself giving false readings.

Temp #3 looks more like the board temp reading there. Unfortunately they mainly provide information on what make and model sensors are compliant while listing some 127 at their site. They don't provide a reference chart to know just what sensors are being read on each make and model board. If your cpu temps climb that will have to be taken care of by reseating or even looking at some larger cpu coolers.
 
PC eye said:
Since you still have the stock heat sink/fan combo the cpu temp is within the normal range there. Currently here the cpu shows 52C idle with temp #1. Temp #2 also related to the cpu shows 27C. The first is the one to go by. When you see a super high temp it is often due to not having a sensor on the board itself giving false readings.

Temp #3 looks more like the board temp reading there. Unfortunately they mainly provide information on what make and model sensors are compliant while listing some 127 at their site. They don't provide a reference chart to know just what sensors are being read on each make and model board. If your cpu temps climb that will have to be taken care of by reseating or even looking at some larger cpu coolers.
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Hi,thanks for the info! So you think I 'll be fine with those readings for the mo?
If I have to re-seat the HSF and scrape off the gunk from bottom of HSF and CPU,how do I do that?
Do I have to take the CPU back out of the socket?
Do I have to unplug PC from wall,turn off switch at back of case before I continue? thanks
 
You wouldn't take the cpu out of the sicket for that. You take the heat sink/fan combo off by releasing the tabs on the two sides one at a time and use rubbing alcohol or similar with a cloth to wipe the old compund off that way.

You do however want to first switch off the supply, unplug the ac cord, and then switch the supply back on briefly to press the power switch on the front to drain the capacitors. Then you switch the supply back off and proceed. That will also recycle the supply itself. You may also want to take a look at some larger heat sink/fan combos that keep the temps down even lower. One little item with a 92cm fan not only cools the cpu but moves a lot of air around inside the case to cool other things can be seen at http://www.coolerguys.com/840556058274.html
 
Hi PC eye or whoever,I have cleaned heatsink/fan and CPU and added a nice pea-sized coating of new thermal paste onto CPU.
After an hour of running PC in bios it said temp of CPU was 44c and two hours later it said it was between 45c/46c (first post was 50c,so it is an improvement of 6c) is that ok?
In config of speedfan I noticed that Temp1 which is CPU reading has the chip no: IT8712F. It is the same chip no as Temp2 and Temp3 which is currently reporting 127c and 118 respectively.. that's why it seems abnormal,don't you think? As you said in one of your posts PC eye about false readings....
This is a Speedfan update two and a half hours after boot.....
Fan1: 4116 RPM Temp1: 45c
Fan2: 0 RPM Temp2: 127c
Fan3: 0 RPM Temp3: 118c
HDO : 27c
An hour later and CPU Temp is still 45c/46c....
When I done a lot of benchmark tests in PC Wizard 2006 i.e video,cpu etc and take in mind with 100% CPU usage it moved to around 50c. thanks...
 
You will notice that the Fans #2 and #3 show NO rpms at all. Fan#1 is the cpu fan itself according to information provided by SpeedFan. The 45C/46C is the normal operating temp according to AMD. You saw it climb obviously when you started a benchmark utility that stress tested it and saw it at 50C which would be expected for a stock sink. If you start seeing it climb up around 55C a reseat or replacement with a larger cooler would correct that. Just keep an eye on the temps.
 
If you see it climbing to 55C for anything that would indicate a cooling problem of some sort such as the thermal compound letting go(not likely now), a fan clogged with dust and dirt, or even a cpu fan that quit. With the older Socket A model here I can punch it higher due to the 85C max while you are at 70C like the rest of the AMD models now out. You want those temps to stay down even with a good load. The one here has seen 73C when the stock thermal pad let go. The sink now has a 92mm fan sitting on top.
 
this is a brand new PC that I have just built so no clogged fans or thermal paste letting go. But I just want to know if it approaches 55c idle should I then start to worry? When I play games etc i.e full load, what's the max temp I can possibly go to?
I have a Sempron 2.8 CPU btw...
also even though it's a brand new PC built with new parts I thought I'd give you some specs, it's a PC Chips M848A SKT A SiS746 AGP LAN 6channel audio with Crucial 512MB kit (256MBx2) DDR PC2700 CL=2.5 UNBUFFERED NON-ECC DDR333 2.5V 32Meg x 64, AMD Sempron 2800+ Skt A OEM,Hightech ATI Radeon 9250 128MB 64bit AGP TVO DVI,160GB HD
 
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I didn't say you have any clogged fans now to be worried about. When a case isn't air cleaned with a can of compressed air regularly you will see dust and dirt build up over a period of time. Some months from now especially on a system used for gaming a thermal pad(preformed thermal compund) could start letting go resulting in an often sudden temp increase.

When thses things happen wonder aboust what is causing system stalls and unexpected system restarts begins. With the stck setup there you can expect between 48-51 0r 52C temps when fully loaded. The average should be right around the 43-46C when idle. Obviously the ideal for gaming and OCing is far less or as low as you can keep it. The good news is that it will handle a higher max temp at 90C for very brief periods only. You can llook over the details at http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/31693.pdf
 
I should be ok then especially if 90C is the max?
Is it also true that Intel CPU's tend to always run cooler than AMD CPU's especially AMD Sempron's?
 
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Intel P4s actually run hotter then AMD models while any of the larger and newer cpu still run hot when loaded. The average for a P4 with stock sink is right about 185F. AMD usually runs cooler but not always by that much. Presently the Atholon XP3200+ here runs about 48C idle to up as far as 53C with a heavy load at times with the cooler seen here at http://www.coolerguys.com/840556035589.html The higher temps are now starting to be a concern since the initial idle temp was at 39C with a load temp at roughly 44C. But that will be taken care of soon with some Artic Silver 5 when I get to that.
 
I have same processor like yours. And when i keep my processor fan in full
speed at is 3000 rpm the temperature is 45c to 55c.
I have side fan and rear fan.
U can try disabling fan control on bios.
 
Sandeep said:
I have same processor like yours. And when i keep my processor fan in full
speed at is 3000 rpm the temperature is 45c to 55c.
I have side fan and rear fan.
U can try disabling fan control on bios.
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u.k. man is running an AMD Sempron 2.8ghz cpu not an Intel like the one you have listed in your signature. Generally the overheat protection circuit will keep the cpu from climbing to the max by shutting the system down if that feature is enabled in the bios. If the system is intended to a gaming machine then there are options for cooling the system as well as cpu down even further.:D
 
PC eye or whoever! How long roughly do I have to 'run' in the PC to see a notable change in CPU temps if there is such a thing.I heard somewhere that after a certain time when the thermal paste hardens up it transfers the heat better or maybe I heard wrong! As you know from earlier I cleaned HSF and CPU and added new thermal paste.I had barely 'run' in the previous HSF combo with the preformed thermal pad that was originally on bottom of heatsink.When I took off HSF the first time to add the new paste it come off very easily, yet in some threads some people had problems taking HSF off due to 'hardening' of paste.When will this 'hardening' phase occur? How long do I 'run' in PC for these temps?
 
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