My CPU Temp is TOO high.

[HKBoy]

Hi, I have a problem with trying to cool down my CPU.

I have an Athlon XP 1700+ (not overclocked as yet ) on an Asus A7V266-E Motherboard, and the heatsink is an Alpha Pal 8045 with a Mitsubishi fan. (Also using Artic Silver 3 thermal paste)

The Computer case is a local one (I-Cute) with 6 fans, 4 in the front and 2 in the back as well as a 350 Watt power supply which also has two fans...

Now the problem is the temperature is running at around 53 C and can go up to around 58 C under heavy load.

Now I've follow the instructions of the AS3 and believe I did a good job in installing it all correctly but no matter what I try to do, I can't seem to get the temp below 50 C.

The room temperature is around 28 C and the windows are open so there is air flow in the room.

I've taken the side panels off the case which makes little difference either.

I've even tried having the fan blow instead of suck on the 8045 but still only little change in Temps. (Sucking is like 2 C cooler)

The last heatsink I used was a cheaper one and the temps were like 55 C with no load, so wondering why the 8045 isn't cooling it to like around 40-45 C???

Is it possible the thermostat on the motherboard is wrong, and if so, any way I can check to find out the true temperature of the XP as no matter what I try to do, I can't seem to get that temp down!

 

[Lt. Max]

might b that the ambient is kind of high... and if case panel removal takes no diff that means u have reached the max wit the air thats in ur room. now its either ur heatsink or ur thermometer is giving wrong temps.

my 2c

 

[res0r9lm]

yes your ambient is high but asus board are well known to report 10c too high. I had the same problem with my asus A7V. I will never will buy another asus seems like they would fix this problem. I think they should compensate poor sucker like me and you for all the cooling gear we bought b/c we thought are cpu's were running hot.

 

[HKBoy]

Okay, thanks for the info guys....

I guess I'll have to leave the setup as it is and just subtract around 10c from the reading to get an idea of it's actual temp.

Just makes it hard to OC as I won't know the true reading of the cpu... oh well.

 

[mustangman]

I have heard a lot about asus reporting 10c high and think this is a good posibility as to what your problem is. I do have one question though, did you bend up the in socket thermistor a little so that it would touch the back of the cpu? If not try it and see if you get any different readings you could be getting an ambient reading from the air in the socket.

 

[Elmo]

While the computer's on, touch the heatsink. Touching it at 43C is a big difference to touching it at 53C.

 

[Flamed_Chip]

I got the asus a7v266-E and suffer the thermistor problem, but when i set this up, i looked for the thermiostor in the socket to bend up, no sign of it, just the square surface mount resistors, so I assume the thermistor is surface mounted...

jus my $0.02

 

[craigiz1]

WELCOME TO THE FORUMS

Yes, the ASUS temps are wrong by about 10*. If you are sure you applied the AC3 properly, then you may want to try and lap the heatsink. This will help to insure that the bottom of your h/s is flat and making the best possible contact on the cpu. Do a search in the forums for lapping.
Good luck and keep us posted.

 

[HKBoy]

Okay, I'll check this 'lapping' thing out and get back to yous for an update...

 

[RnPgrosz]

The asus motherboards are known to be totally inaccurate. I have a a7v133 and an av7e they both report 5-10c higher than the correct temp.

 

[rlemieux]

My P4T-e reports about way too high. I have heard alot about this. I use Hardware monitor, you can download it from http://download.cnet.com/downloads/0-10106-100-7963984.html?tag=st.dl.10001-103-1.lst-7-2.7963984 its pretty simple and seems to be acurate.

With asus's monitor, it read at like 55C. Using the Hardware monitor, Sandr, MBM5, and the BIOS monitor it reads the same temp at 35C. So thats a 20C difference with Asus.

 

[HKBoy]

Okay, I haven't lapped the heatsink as yet (don't have the sandpaper) but pulled it apart and checked it out.

Inside the tray where the cpu sits there is no thermistor, but lots of little box shaped components which I gather are resistors or diodes, so can't (and will not try to ) bend them.

The face of the heatsink does have some slight grooves in it from machining but don't think that would be enough for the high readings.

I ran the program Hardware Monitor as said and it reads identically to the asus probe one. (53c without load)

One thing of interest is my Mitsubishi MMF-08B12DH-W CPU fan which seems to be reading around 2576 RPM, so don't know if this is because of the motherboard doesn't think the fan needs to spin any faster as of the cpu temp or what?

Also my motherboard reading is 32c...

 

[Flamed_Chip]

yeah, like i posted up there a bit, the thermistor must be in a surcafe mount case (the little boxes) like the resistors, so no chance of bending it up

 

[res0r9lm]

yeah, like i posted up there a bit, the thermistor must be in a surcafe mount case (the little boxes) like the resistors, so no chance of bending it up

I think all the asus boards use the same type thermistor since the a7v rev. 1.02

 

[racecar12]

If you are interested in knowing your correct core temp(or much closer), go with something like thisand trim back the protective coating on the probe so the thermistor is closer to the core. Pic below.

Make sure you get good core contact. Adding the probe may cause inproper core contact going that extra 1.5mm closer to the core by cutting back the coating. Just trim some of the heat shrink back on the wires if you have improper core contact on the side where you mount the probe. It is a double install of the hsf, but alway better to be safe than sorry.

 

[Wolfmist]

I am so glad you posted this. I had the exact same problem. I have the exact same mobo as you (A7V266-E). I have a 1900xp though. Anyway I started this thread a month ago:

http://forum.oc-forums.com/vb/showthread.php?s=&threadid=73237

The asus probe reported 53C with water cooling. Man was I confused. I thought I was running way too hot. So don't worry. Its just Asus lying. You're probably much cooler.

I still don't know how hot my CPU is, but my water gets to about 31-32 C the warmest, so I imagine the CPU can't be much warmer than that.

Hope I helped.

 

[HKBoy]

That's good to hear, guess I have two options for the future.

1) Buy a different board (333 DDR )
or
2) try to wire up my own thermostat as stated before.

Either way, I feel much better now knowing that my cpu isn't too hot, guess I'll have to attach a probe to it soon so that I can OC it and know what it's really running at.

 

[elysium]

Just makes it hard to OC as I won't know the true reading of the cpu... oh well. [/B]

Oc until smoke starts comming out of your computer. Then you have pushed the limits

Ely

 

[VaTechHokies]

Try using MBM5. I installed a P4T-E a few weeks ago and was getting readings of aroune 45 - 51 C with the ASUS probe. I installed both Sandra and MBM5 (they're both reading the same temps) and my temps dropped to what the bios was reading...between 27-31 idle and 38-42 full load. The asus probe software really is just a piece of junk. Keep us informed!

 

[HKBoy]

A friend told me to use MBM5 a little while ago , at which I did but it still read the same temp as Asus Probe and Hardware Monitor so it looks like the hardware which is not reading the temp correctly in this case...