cpu upgrade heat issue

shawtravis88

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May 14, 2014
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I just upgraded the cpu in my hpg62435dx laptop from the dual core turion to a quad core phenom II. now the phenom although not hot to the touch fanspeed says it is at 80 degrees C while doing nothing and ive noticed the laptop bogging down even with 8G of ram. do I need to upgrade the fan and heatsink assembly as well?
 

Pocketfullanut

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Apr 4, 2013
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You might not have the heatsink mounted right. I would take it back apart and remount the cooler. It might need a better cooler as well. Not sure how laptop coolers work. But i would look at remounting the cooler first and go from there.
 

shawtravis88

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May 14, 2014
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yea I am pulling it apart now to take a look at that. I looked into both processors and they both have a thermal rating of 25w which means this heatsink and fan should in theory work. I think it may be an issue where I did not apply enough thermal paste. its rather hard to incorrectly mount the heaatsink on the cpu in a laptop.
 

shawtravis88

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May 14, 2014
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the quad is new. I have it apart as we speak and am waiting for the alcohol that I used to clean the parts to dry. while I do that I am looking up the amount of thermal paste to use and a good way to spread it evenly. this is my first processor replacement in a laptop and I wont be overly upset if it doesn't work. the problem was also the system board. I reflowed the board in my oven and I was surprised that worked.
 

shawtravis88

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May 14, 2014
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ok so I have now tried a new heatsink and fan assembly. made sure to use the correct amount of thermal paste spread evenly. updated the bios. and I am still getting an overheat issue. under heavy load and at 36% the temps are sitting steady at 70-75 degree C. yet the hard drive is only at 45 C and I can feel the fan on the heatsink spinning. I am also currently running it with the battery removed, cpu max is down to 98% in power setting and it is sitting on a cooling pad. any thoughts?
 

shawtravis88

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May 14, 2014
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discovered the problem. the fan and heatsink assemble had dust hidden inside the fan blocking the entrance to the heatsink. a quick dismantle and blow out with some compressed air was all it needed. thank you for the help guys.