How accurate is the CPU Temp Sensor ?

[CygnusX1]

Hi everybody,

 

I was wondering if anyone could tell me how accurate the Temp Sensor of the DFI Board reads out the core temperature of my venice. I removed the Heatspreader, used Artic Silver 5 and it's watercooled. Idletemps are about 34°C, but after a few hours of prime95 torture test with Large FFTS, my CPU temp is between 48-50°C. I think this is a bit high isn't it ? If this is the real temperature it would be alright I think, but someone told me that I could a 8 to 10 degrees on top of the temp that has been read out to receive the real CPU temp. I read my temps out with ITE Smartguardian. But Everest reports the same.

 

So how accurate is it ?

 

 

thanks !

 

greetz

[Guest thespin]

I think your temperatures are pretty good and probably pretty accurate ...

[CygnusX1]

well this "probably pretty accurate" doesn't help me very much

[RGone]

No temp from read out is totally accurate ever. Period. Standard or what most others see with same board and bios? Yes that should happen generally.

 

8C to10C more than is shown is spoken to you by someone else? That is as 'iffy' a statement as the one made above you did not like.

 

Many are claiming the NEW SLI-DR Expert reads LOW by that amount but it has NEVER been said in here that the regular non-expert boards have mis-read the temps. You don't add to that board. You see it you got it within whatever margin of error has been there for almost 12 months. And I have not heard anyone say the original non-expert board to be very far off. That is just about the way it is.

 

If it rises that much you have a heatsink problem water or no water and that seems about it as well.

 

RGone...

[lowboy]

All on board sensors for ALL mobo's are known not to be accurate, they are just a guide to know if too hot. But seem to be fairly close. Thats the best and only realistic answer to your ?

[macelius]

from my experience the sensors on these are 'pretty accurate'.. that means theyre not xactly right but will give you a good idea for monitoring purposes. the temps are fine as in not too hot wise, but you are hitting 50 which is still prefectly safe, in fact, normal, for stock, but oc tends to mess up higher than that. what kind of water cooling are you using? it sounds like its pretty much maxed out if its a smaller pre-built or kit, if you have big custom WC it should be cooler, maybe the waterblock is not making full/good contact with the die, it has to sit lower since you cut about 2mm of heat spreader off so it may be hitting something around the processor thats higher than the die and making it tilt, you might need to shave the plastic proc bracket if its still there, or shave off the waterblock if its a component thats in the way.

[CygnusX1]

Thanks for the answers, and yes, I know the sensors are not accurate but I just wanted to know I somebody can point me into a direction. But as there are no certain investigations I can forget this then. I was just afraid if the temp shows 50°C that it would be 60°C in real and that I would burn my cpu in that case. The watercooling is a high quality professional Kit from http://www.aquacomputer.de It's defintely not maxed out as I'am using a triple 120mm fan radiator and all the PAPST fans are running on 5V, which is enough as I can also see from other users reports in the AC board. The coolers are one of the best the market has got to offer, all from Aqua-Computer, who are getting more and more attention in the US moddingscene.

 

The Cooler is mounted really "tight" enough, also with a removed HS, believe me. But perhaps the thermal paste is really not spread smooth. I will remount it and have a look.

[lowboy]

Temps seem high to me I run 25c idle -and 36-38c at load with 2primes running. I know AC uses small bore tubing where I have 1/2in and not sure how much pump. I know I would not be happy at 50C. I ran at 48C with air cooling.

[LDog69]

Hi everybody,

 

I was wondering if anyone could tell me how accurate the Temp Sensor of the DFI Board reads out the core temperature of my venice. I removed the Heatspreader, used Artic Silver 5 and it's watercooled. Idletemps are about 34°C, but after a few hours of prime95 torture test with Large FFTS, my CPU temp is between 48-50°C. I think this is a bit high isn't it ? If this is the real temperature it would be alright I think, but someone told me that I could a 8 to 10 degrees on top of the temp that has been read out to receive the real CPU temp. I read my temps out with ITE Smartguardian. But Everest reports the same.

 

So how accurate is it ?

 

 

thanks !

 

greetz

 

Your temps do seem a little high to me, but not unreasonable. On air, with the IHS and with more voltage, my CPU idles between 29C-31C and maxes at 47C or so. It's not apples to apples, but you may be able to save a few more degrees somewhere...

 

FWIW, this is in a normal house bedroom, always ~72F.

 

And as far as the sensors go, if I'm not mistaken, in general the actual sensor is accurate, but their location and other factors can make them less useful.