E2160 max temperature?

E

evt

Limp Gawd
Joined
Apr 6, 2006
Messages
253
At 9x300 and 1.25 vcore, during load, the cpu will hit the high 60's C and possibly spike into the low 70's with 26C ambient.
The cooler is an ZEROtherm CF900 and the mobo is a GA-965P-DS3 with FSB and G(MCH) voltage bumped up to 0.1v.
HSF link:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835887004&Tpk=ZEROtherm+CF900

My question is that is it safe to be at that temperature? I remounted/reapplied the HSF 3 times with AS5, and the temperatures didnt change much at all. (either I am not applying the paste right, or this is the best it will get).
 
Core Temp 0.94 says 21C on one core and 24C on the other. That temperature is impossible because that is below ambient. I thought that coretemp and tat were almost equal in the temperature sensors?
 
Any Core2 has one temp sensor on each core (under the IHS), and one sensor on the CPU case. Most people refer to the case temperature as their CPU temp, but Coretemp and TAT only report the core temps, which are always going to be 10~15C higher than the CPU case. So your 65~70 load temp is really more like 55~60 by normal people measurement. I have a [email protected] and a Scythe Katana2, and I'll see about the same temperatures you're getting.

http://www.tomshardware.com/forum/221745-29-core-temperature-guide
^^Neat little C2D temperature from someone on the THG forums, which goes into some detail on the topic.
 
On my E6400 which CoreTemp uses an assumed maximum Tjunction temperature of 85C, I also get readings below ambient which is impossible but when the core temperature gets up over 50C and all the way up to the maximum of 85C it seems to be 100% accurate as measured with an IR thermometer pointed directly at the IHS without a dumb heatsink and fan getting in the way of a good measurement.

My theory is that the on chip digital thermal sensors are not accurate at low idle temperatures. They were not designed for that purpose and that's why Intel does not document their use for that purpose. They are designed and calibrated to accurately determine the thermal throttle and thermal shut down point and the DTS works great for that.

Answer: Ignore the below ambient readings at idle. That's normal. The programmer of CoreTemp that decided to "correct" this problem by switching to a maximum Tjunction temperature of 100C has likely made a mistake and he should have left it at 85C which gives you a very accurate absolute maximum temperature but a not very accurate idle temperature.

Just for comparison, CoreTemp reports my core at about 3C below ambient when not overclocking and at low voltage with the case open while using a Tuniq with the fan on max. The revision L2 Intel processors put out even less heat than my revision B2 so idle temperatures even further below ambient are likely.

Edit: Also keep in mind that the ZERO Therm is not a top rated cooler and only uses a 92mm fan compared to most that are using a 120mm fan. The stand up heatpipe coolers have been proven to be better than any of the traditional coolers that blow directly towards the cpu.
http://www.anandtech.com/casecoolingpsus/

http://www.frostytech.com/articleview.cfm?articleid=2037&page=4
"The Apack Zerotherm CF900 heatsink was next tested with an 85W heat load, where it maintained a 20.3°C rise over ambient. This is effectively the same as the stock Intel heatsink managed."
 
evt said:
Core Temp 0.94 says 21C on one core and 24C on the other. That temperature is impossible because that is below ambient. I thought that coretemp and tat were almost equal in the temperature sensors?
Click to expand...

Thats the correct temp.
 
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