Dodgy E8500?

[thetourist]

Hey guys,

Recently upgraded to an E8500 from an E2180 in my IP35-E with AC Freezer Pro.

I installed the E8500 and everything seemed OK. I then went to check the temps. 47C idle at stock volts. I tried running Prime 95 and the load temps hit 60C. I'm monitoring the temps in Real Temp - I also checked BIOS which reports a very similar idle temp.

Obviously, this concerned me - the temps seem far too high for a 45nm chip at stock volts/FSB.

I assumed maybe I'd made an error with re-fitting the heatsink (using Ceramique compound btw) so I cleaned everything and re-applied/re-seated. No change to the temperatures.

As a test, I put my E2180 back in, didn't even bother cleaning it or anything and re-sat my HSF. Checked temps and this 65nm chip at stock volts (more volts of course than my E8500) reports idle temps of around 29C. Clearly much more acceptable.

So I'm now stuck with what to do. Could it be that:

1) The temperature sensors for my chip are dodgy and reporting temps at say, 10C higher than they actually are?

2) My chip is broken in some way, and is running far hotter than it should?

3) My HSF is incorrectly fitted yet again - seems unlikely as I do it the same way each time and there are no issues with cooling the E2180?

Either way, I'd appreciate any advice possible on this. I'm considering returning the chip.

Cheers

 

[SK-1]

Known issues with these cpu's. Reports higher that actual. Use this and calibrate it.
http://www.techpowerup.com/realtemp/

 

[thetourist]

Cheers to the advice, I will try calibrating.

But can I just confirm, is it actually possible for a chip to be faulty and run too hot?

Is it safe for me to just assume that my temperature readings are definitely incorrect?

 

[twicksisted]

check this post out for more help:
http://forums.techpowerup.com/showthread.php?t=51359

 

[thetourist]

Interesting.

My room temperature is 21C.

Running the E8500 underclocked at 1.4GHz, 1.192V, Fan Speed Max, reports a temp of 44C.

Accordingly to RT's calibration guide, I should expect the actual temp to be about 5C more than room temperature, i.e. 26C.

So my temps are a massive 18C out? Real Temp's calibration is +/-3.

 

[twicksisted]

Interesting.

My room temperature is 21C.

Running the E8500 underclocked at 1.4GHz, 1.192V, Fan Speed Max, reports a temp of 44C.

Accordingly to RT's calibration guide, I should expect the actual temp to be about 5C more than room temperature, i.e. 26C.

So my temps are a massive 18C out? Real Temp's calibration is +/-3.

How did you install it, what heatsink and thermal paste are you using?
also, did you make sure that its making proper contact with the heatsink... are all the push pins in completely etc

 

[PaulieG]

It is possible that your mother board is reading the cpu sensor incorrectly. Do you have another board to try the chip with?

 

[thetourist]

Arctic Cooling Freezer, AS Ceramique. Compound applied as per AS's website. I've re-fitted and re-done the HSF/compound THREE times now. As mentioned previously, I put my E2180 back in and without even cleaning the compound, and seating my HSF as per usual, it reported temps of 30C idle.

I'm certain theres nothing wrong with the way the CPU is seated.

 

[twicksisted]

aaah ok... hmm... well I dunno as I havent used the new E7XXX & E8XXX series chips yet but i do remember reading on here that they had issues with their temperature sensors not giving out correct readings.

 

[thetourist]

It is possible that your mother board is reading the cpu sensor incorrectly. Do you have another board to try the chip with?

Good idea - I have another 775 board, an Asus P5LD2-SE, but for some reason it wouldnt post with my E2180 in it (which I know is working fine) even after a BIOS flash. So I'm reluctant to try my E8500 in it.

Another question - do you think it's possible I can estimate the temperatures by touching the copper pipes on the heatsink? Should they be "hot" at 50C?

 

[thetourist]

Just a quick update. I'm running at 3.8Ghz, 1.208V.

The copper pipes at the bottom of my heatsink feel barely warm. Apparently the CPU is 60C. Somehow I don't think so. The northbridge is hot to touch.

I'm almost certain it's dodgy sensors.

 

[kyle2020]

deffinately screwed sensors. I wouldnt worry about it, but try and find a solution, so you can actually monitor temps during OC etc.

 

[thetourist]

I think I'll just take about 15C off the temperatures the Real Temp is telling me.

I'm still a bit warying of ignoring them, but like I said, the heatsink just doesn't feel as hot as I'd have thought it would be at "60C".

I could return the chip perhaps, but it seems an alright clocker. I've managed 4Ghz fairly easily although load temps are apparently "70C". Which I think are nearer 55-60 in reality.

 

[twicksisted]

aaah itll be fine... they have thermal throttling...besides i doubt you'll keep that chip for longer than 2-3 years anyways with the fact that you like to overclock and Nehalem is on the way soon

Have fun with it... if it does 4ghz

 

[thetourist]

1.27V, 4Ghz Prime Stable atm

Load temps apparently "63C"

 

[kyle2020]

1.27V, 4Ghz Prime Stable atm

Load temps apparently "63C"

how long into prime?

 

[thetourist]

Ah sorry, my TJmax was set to 95 when it should be 100. Been priming 1hr 30 or so, currently at "67C." Copper at the base of the heatsink still only feels warm, and is not what I would consider hot. (Nortbridge on the other hand, can't touch for more than a few seconds before it starts to hurt)