Whats up with this adding +15c to temp readings?

[Allistah]

Hey all..

I've seen people mention that you have to add +15c to your temp readings. Is that just for some procs or all of them? How do I know if I have a proc that I need to do that with? Mine is an e6850 3GHz C2D.

The next question I have is what program will display the proper temperates in the system tray? I'd like to have a monitor running at all times so I know what my CPU and GPU are doing temperature wise. Maybe just Motherboard Monitor will work fine?

Thanks,

-Allistah

 

[ksource]

I believe if you read in the sticky, speedfan reads low by 15c. A program like RMClock is supposed to read the accurate reading.

Someone correct me if I'm wrong.

 

[Rike]

CoreTemp will give very accurate temps and give them to you per core. It will run in a system tray and it has a logging feature, but I'm not sure how to access the log. I can't seem to find it anywhere.

In any case, you could use CoreTemp to judge the accuracy of other temp programs you might use.

 

[mrfatboy]

Originally posted by: Rike
CoreTemp will give very accurate temps and give them to you per core. It will run in a system tray and it has a logging feature, but I'm not sure how to access the log. I can't seem to find it anywhere.

In any case, you could use CoreTemp to judge the accuracy of other temp programs you might use.

I don't think this is the case. TAT, Coretemp, Speedfan, RMclock are all giving me the same temps. If one is wrong they all are wrong. All I have read on these forums is that you have to add 15C to the temps for them to be accurate.

I would also like to know if there is a program out there that has accurate temps.

 

[nyker96]

core temp 0.95 is the accurate one. speedfan 4.32 you need to add 15 to the reading.

 

[bryanW1995]

the easiest way to tell is to boot up at stock speeds and check out your idle temps. if ambient is 22 c and you idle at a number less than 22c, you are either using extreme cooling solutions or your sensor is off by 15c. tat/speedfan/rmclock/coretemp/etc all read off of the same sensor. on e6x50 cpus, the tjunction is incorrectly shown as 85c instead of 100c right now, so all of those are 15c low on cpu0 and cpu1.

 

[mrfatboy]

Originally posted by: nyker96
core temp 0.95 is the accurate one. speedfan 4.32 you need to add 15 to the reading.

They are both reading the same temps for me so they are all incorrect.

 

[Allistah]

I remember that all of mine read the same thing too, including CoreTemp 0.95.

This is crazy.. So basically none of us really know what the real temp of our stuff is.. haha

So is this an Intel bug in the proc or what? I do know that my e6850 shows the tJunction as 85c but that I heard from a previous post was that it should be 100c?

Man, this is terrible.. Makes it ultra confusing and really difficult to know where you're really running at in regard to safe temps and how close you're really getting to the danger zone when you overclock.

-Allistah

 

[Accord99]

The main thing is that the absolute temperature is unknown, but the delta between the current core temperature and the throttling temperature is very accurate. Set Core Temp 0.95 to display the delta between Tjunction and don't worry about it unless the delta starts approaching 0.

 

[covert24]

the same thing is happening with my x2 4000+ Why cant people just make everything uniform and make programs and hardware cope with eachother? i mean wuts the point of designing a program if its not going to be right?

 

[Allistah]

So on my e6850 the tjunction is set at 85c. Then when I was running with a full load, core temp showed a delta between tjunction as about 27c.

But I thought the procs had an incorrect tjunction? I read somewhere that my procs tjunction should be 100c.

heh - more confusion - sweet!! ;-)

 

[Skott]

As I understand it if your tjunction says 85C on the new chips then add +15C to your core and then you'll have the correct temp. Thats what the OP needs to do.

 

[Allistah]

So is it safe to say that my reading of 27c delta to tjunction is accurate even though it reads 85c?

 

[Accord99]

Originally posted by: Allistah
So is it safe to say that my reading of 27c delta to tjunction is accurate even though it reads 85c?

Yes, if you use the readings this way you don't need to worry if the tjunction is accurate. 27C away from throttling is a pretty safe distance so your temperatures (whatever they actually are) are reasonable.

 

[brxndxn]

Originally posted by: Accord99

Originally posted by: Allistah
So is it safe to say that my reading of 27c delta to tjunction is accurate even though it reads 85c?

Yes, if you use the readings this way you don't need to worry if the tjunction is accurate. 27C away from throttling is a pretty safe distance so your temperatures (whatever they actually are) are reasonable.

My E4300 says 100C Tjunction in Core Temp.exe.. If I overclock my CPU to 3ghz (which requires at least 1.45V in the bios (more like 1.4v actual), the cores get up to 82C with Orthos running.

But.. should I even care if it says 82C since that's still 18C away from throttling?

I'm running a stock fan.. but I lapped the CPU. I really think I either got stuck with a shitty E4300 or people aren't getting as fast of speeds as they're saying with stock voltage.

 

[SerpentRoyal]

Either a so so CPU or MB.

 

[Skott]

Originally posted by: brxndxn

Originally posted by: Accord99

Originally posted by: Allistah
So is it safe to say that my reading of 27c delta to tjunction is accurate even though it reads 85c?

Yes, if you use the readings this way you don't need to worry if the tjunction is accurate. 27C away from throttling is a pretty safe distance so your temperatures (whatever they actually are) are reasonable.

My E4300 says 100C Tjunction in Core Temp.exe.. If I overclock my CPU to 3ghz (which requires at least 1.45V in the bios (more like 1.4v actual), the cores get up to 82C with Orthos running.

But.. should I even care if it says 82C since that's still 18C away from throttling?

I'm running a stock fan.. but I lapped the CPU. I really think I either got stuck with a shitty E4300 or people aren't getting as fast of speeds as they're saying with stock voltage.

What mobo are you using?

 

[aka1nas]

Originally posted by: Allistah
I remember that all of mine read the same thing too, including CoreTemp 0.95.

This is crazy.. So basically none of us really know what the real temp of our stuff is.. haha

So is this an Intel bug in the proc or what? I do know that my e6850 shows the tJunction as 85c but that I heard from a previous post was that it should be 100c?

Man, this is terrible.. Makes it ultra confusing and really difficult to know where you're really running at in regard to safe temps and how close you're really getting to the danger zone when you overclock.

-Allistah

It's not an Intel bug, the various monitoring programs just haven't been updated for the C2D models with the higher Tjunction temperature. All of those programs that use the on-die temp diode have to derive the actual temperature using a formula.

The affected monitoring utilities will at least always be off by the same amount, and in most cases have features to correct the temperature. You can manually correct the 15C offset in Speedfan, for example