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CPU temp question

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November 21, 2008 8:28:25 PM

I have an e8400 (stock cooler and hs) not o'ced whatsoever. I have 2 case fans in the back blowing air out and one on the side sucking air in. I have a bunch of dif. temp readers and was wondering which one you guys think is most accurate, and if it is safe to oc with stock cooler

(all at idle)
AsrockOCTuner - 43c
SpeedFan - CPU 44c, core 1 40c, core 2 40c
CPUID Hardware monitor - core 1 40c, core 2 40c, max 43c
Real temp - both cores at 35c
Core temp - 40c

More about : cpu temp question

November 21, 2008 9:28:51 PM

Looks like it should be 40C. CoreTemp and Speedfan tend to be more reliable than others. Real temp is known to underestimate. Not sure about AsrockOCTuner, but motherboard manufacturer utilities are usually not very good.
November 21, 2008 10:18:21 PM

...so is this safe for overclocking
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November 22, 2008 2:11:08 AM

hmm i have a e8400 also mine idles at 38, and i use a program that came with my motherboard call Easy Tune5 Pro. i have a gigabyte motherboard. what do you have? if you have a gigabyte chances are it came with that same program. the program is acurate because i checked it with my bios. anyways id say the ones that read 40c would be most accurate.
November 22, 2008 2:17:21 AM

oh and yea thats very safe for overclocking, in fact e8400s are very reputable for overclocking well.
November 22, 2008 2:33:58 AM

joel17 said:
hmm i have a e8400 also mine idles at 38, and i use a program that came with my motherboard call Easy Tune5 Pro. i have a gigabyte motherboard. what do you have? if you have a gigabyte chances are it came with that same program. the program is acurate because i checked it with my bios. anyways id say the ones that read 40c would be most accurate.
Don't rely on that program, use Core Temp.




wmdwmd123, follow daggers advice, run prime small FFTs and use Core Temp.

Read the Core 2 Quad and Duo Temperature Guide for more information.




November 22, 2008 11:17:01 AM

yeah also do I wanna look at each core's temp or the overall cpu temp (which is much lower)
November 22, 2008 5:40:06 PM

You want to look at the core (Tjunction) temp. Technically if you want to drive the temps close to their max you need to look at both and calibrate them to ambient at idle, especially with the e8xxx series. Read the guide I linked to, it explains the relationship between Tcase and Tjunction and how to calibrate them. If you are running hot the Tcase is as important as Tjmax. Either that is over the max can damage the CPU.

Did you run Prime95 small FFTs and measure the temps with Core Temp? If so, what are they.
November 22, 2008 6:48:03 PM

yeah I ran it at 3.0 ghz it was 61c max load on the cores and then I oc'ed it to 3.6ghz and it was 65c max load on the cores.... which are both less than 72.4 so I'm assuming I'm okay
November 22, 2008 7:03:46 PM

wmdwmd123 said:
yeah I ran it at 3.0 ghz it was 61c max load on the cores and then I oc'ed it to 3.6ghz and it was 65c max load on the cores.... which are both less than 72.4 so I'm assuming I'm okay
You didn't read the guide or you would know that 70 is considered warm and 72 is very close to 75 which is too hot. :non:  These numbers assume that you have calibrated the Tjmax and Tcase. You are correct in your assumption that 65C is safe, but those chips are notorious for giving inaccurate readings, usually closer to idle though.

As per the guide.
Quote:
E8x00: Tcase Max 74c, Stepping E0, TDP 65W, Idle 8W
-Tcase/Tjunction-
--70--/--75--75-- Hot
--65--/--70--70-- Warm
--60--/--65--65-- Safe
--25--/--30--30-- Cool
You really should take the time to read the guide and fully understand the relationship between Tjunction and Tcase. But if you don't want to, then I would say at 65C you are safe.

Also, you keep using 3.6G, but in your earlier post the pic showed a multi of 8. So are you really running at 3.6G or 3.2G?
November 22, 2008 8:03:53 PM

I didn't post a pic and yes it's a multiplier of 9 and the guide's a million pages long I'm not intriguied
November 22, 2008 8:07:03 PM

Oops, I got two threads mixed up again. My apologies. Someone else with a Q6600 was claiming 3.6 but was at 8X. The rest holds true.
November 22, 2008 10:05:52 PM

wmdwmd123 said:
the guide's a million pages long I'm not intriguied
To dry for you? Then scan it for pertinent data.
November 22, 2008 10:22:42 PM

yeah too dry maybe someday when I have a bunch of free time and patience but I'm not willing to get into that tjmax stuff I don't even know what it means (which is probably explained in the arcticle) all I've heard from every source is e8400 is a great overclocker even with the stock hs and normal voltages you can easily get it to 3.6ghz...... correct me if I'm wrong but I don't think I am
November 22, 2008 11:01:27 PM

yes 3.6 is easy and the e8400 overclocks easy and well but dont ignore temps lol. zorg is trying to keep you from burning down is all.
November 22, 2008 11:14:56 PM

Well, CompuTronix put his blood into the guide to help everyone not "burn it all down". The guide is made for people that care enough to spend the time. I know that in these days and times we all want to be spoon fed the information. It is a sad time isn't it? At any rate, I learned a long time ago that if you don't have a complete understanding, or close to it, then you have no understanding at all.

Move forward with your OC in blissful ignorance.

Good day.
November 22, 2008 11:24:53 PM

anyways... thanks for the help and good day
November 23, 2008 8:13:14 AM

Sorry, didn't mean to be nasty. If you need help with the guide PM me.
!