how reliable are tat and coretemp?

because they both are reading my temps on the cpu low. they both read cpu0 at 22c and cpu1 at 20c.

Need more info. Alot more. what are your rigs specs? What is the ambient room temp? How is your case flow?

IF you have good cooling a with good ventilation and your room temp is 17-18C then 20-22C could be roughly acurate. But, if your room temp is 28C then yea something is amis.

I personally use Speedfan because both TAT and coretemp (version 95)read my E4300 +15C too high. They may read all L2 stepping high but that another discussion.

my rig
cpu - e6600
mb - evga 680i sli
video card - evga 8800gts 640 superclocked
ram - 2x1gig Patriot eXtreme Performance DDR2 800 (PC2 6400)
case - NZXT Zero with 7x120 fans and 1x80 fan
hs - thermalright ultra 120 extreme with a 120 fan

case flow is 1x 120 front 4x120 side 2x120 back 1x80 top

room temp is ruffly 23c
hope this helps

here is a pic of temps i dont know what to do. i want to oc it but got to find out what the temps are first. any ideas?

it appears as though TAT, CoreTemp, and SpeedFan are all in agreement about your Tj.

my vote is that you are good to go.

true, but should the core temps be below the cpu temp? or do i have it wrong?

Oh, I see your problem





You have an Ultra 120 Extreme. It's the best air cooler out there so that's why you get those really low temperatures.

Better give it to me, and get a new heatsink.

lol i will ship it out right now. i got out my temp gun and did some readings. my room tepm is 21c the exhaust from my case is 23c. so with these temps and this setup will it oc good?

Oh YEAH!! You have like the perfect OC'ing on air setup. Your temps are almost cold With your system, I'm thinking 3.2 to 3.5GHz.

Good Luck!

In theory, the core temps can't be below cpu temps. There's a few of us having the same problem (myself included).

I don't think it's a software problem - more likely a sensor problem (or temp tables).

Wish I could be of more help, but I'm as confused as you.

thanks for the help. i will test the waters on ocing this this tonight. i will probly be asking alot of questions so bear with me. thanks

As I have posted many many times, There is no way to read the core temperature directly of a C2D via software. The chip doesnt have the capability. The software programs are making a guess based on some assumed variables like a basline temp of 50 or something, and a Tj Max temp of 85c. Then using these assumed vairables in a formula, they produce a number and call it your temp. They are however fairly acurate in most cases. Just not absolute and this is almost certainly why we see soo many anomolies regarding temps on different configs.

Transister Thermal Diodes that are more then 2C off are considered bad in almost any circumstances and would not be used. Generally a TTD is within .2C acuracy. and in most instances its the series resistance that will make them inacurate, not the diode itself as they are inherently acurate.

so what you are saying is that my temps are not correct. right. if that is the case what is the best way to check your temps?

personally, im running under the assumption that SpeedFan, CoreTemp, and TAT Tj is correct and the SpeedFan CPU temp needs to be manually offset to get it inline with the rest, but im certainly not any kind of engineer or tech guru.

i figure, if i keep my highest 100% load TAT reading below 55, then im pretty safe, even if the TAT reading is a few degrees off. i think its highly unlikely that all three programs are 30+ degrees off and im burning up my CPU