Clevo P150EM/Mythlogic Pollux 1612 1 Core High Temperatures

I've been noticing the fan a bit more often recently, and most of the sensors show that the 4th core is 7-8 degrees warmer than the other three at around 52C at idle. Does this mean I should attempt a repasting?

 

ive got 2 cores on 58 ad 59 so dont worry but it is 32c here today.
what temps do you get under load and also whats your ambient room temperature and when was the last time you cleaned the vents and fans out with compressed air.

 

I blew out the vents and the fans a week ago. Ambient is 75F. Sometimes under load I get warnings that the 4th core was throttled due to temperature issues. I don't know a good way to test temperatures under load. Do you have something to recommend under linux or windows 7?

 

check out the link in my sig below.
download core temps and and gpuz for gpu and leave them on desktop.
you should already have this loaded but check for intel matrix tuning software. click cpu and run it for 5 minutes. ive had all 4 cores on 98c before as this is the most demanding stress test. go through the menu first (spanner) and set each core to a different colour and also throtling to red and then watch them strain.

 

I've had a similiar problem few months ago. It is coused by air bubles in the thermal paste that can appear above certain core and cause these different temperatures. Just do a good repaste job and you'll be fine. Hope it helps.

Oh, and to stress your CPU you can try something like wPrime

 

I ran the Extreme Utility Benchmark. All of the temperatures were pretty consistent under load, but it said that the CPU was throttled around 30-40 percent during those tests settling around 2.9Ghz. Is that normal? I'm downloading 3dmark now, post the results later.

 

under full stress that CPU should be able to go 3.0 to 3.2Ghz and never go much higher than 90C

 

that is the stress test of all stress tests and after a repaste mine are all consistent with no down clocking but after about a month it starts throtling again and its been repasted 3 times by the experts so its a bit confusing whats happening.
i never notice any down clocking during gaming though so im not too bothered.

 

well its normal that even the best thermal paste loses its potency when the chip its supposed to transport heat from is stressed hard repeatedly over longer time periods. so to get the best temps a repaste is in pretty regular order

Sent from my Galaxy Nexus using Tapatalk 2

 

Differences in core temperature can be caused due to non flat heatsink surface, mouting being uneven, thermal paste application/ageing or just that the sensors are not calibrated the same.

 

Not to mention room temperature differences, humidity differences, any amount of dust in the heatsink, laptop on a different surface etc.

Thermal paste should not need changing that often if it has no air in it and was done properly. You should normally be able to get about a year out of it without much temp change. Now after a year it might change a degree or two but shouldn't be anything too drastic and I wouldn't go changing every few months just to do as you risk more damage from repeated cleaning and apply etc. not to mention will wear the tension of the heatsink more and it won't put as much pressure. Also some, such as the Diamond one cause micro scratching and repeated removal and application will cause more of these micro scratches which will further reduce efficiency.

 

I'd vote for a repaste. Just had similar experience as over the past 6 months i saw one of my cores go higher and higher. Finally got to over 100C in a few games, so I went to radioshack and bought some artic 5. Temps are now back at a maximum of 82C

 

I was more talking about the differences between core 0 and core 3.

"micro scratches" are unlikely to have any significant impact on cooler performance.