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Started by Agera One | | 7 answers
GPU temp probs after dis-assembly/reassembly
My Sony Vaio VPCEB34En laptop's CPU and GPU share the same heat sink and fan. I removed for cleaning purpose. After I cleaned my fan, I mounted them back. At first, the laptop didn't power up and the fans are not spinning. Then I checked to see whether my CPU is seated well and it wasn't. I fixed that well and now using the laptop. But the GPU and System temps from Speedfan were showing high temps. Here are the conditions:

Before dis-assembling CPU-GPU-Fan assembly (SpeedFan temps with one-tab browsing):
CPU 46-48 C
GPU 56-58 C
System 56-58 C
CPU Fan 4260 RPM (this was the highest recorded RPM even when playing games)

After dis-assembling and reassembling CPU-GPU-Fan assembly (SpeedFan temps with one-tab browsing):
CPU 46-48 C
GPU 65-68 C (at most went to 73 C)
System 65-68 C (at most went to 73 C)
CPU Fan 3700 - 4200 RPM (reached max of 5130 RPM -This might reduce bearing life :(  )

So where did I made the mistake that made GPU alone go hotter but not the CPU?
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October 19, 2014 4:26:10 AM

Those kind of alcohols aren't easier to get here, even through online purchase. So, I need a easier safe method :??: 
October 18, 2014 10:38:00 PM

Use rubbing alcohol.
October 18, 2014 10:34:31 PM

Okay, can I use a steel ruler or something hard like that to scrape off the existing thermal compound? Because it was very dry, so I guess I need to use a strong thing to scrape. ???
a b D Laptop
October 18, 2014 2:20:47 PM

I'd clean it up and re-apply
October 18, 2014 8:05:01 AM

I didn't re-apply any. When I removed the set-up from mobo, a part of thermal paste came along with the GPU back plate and the actual GPU chip soldered to the motherboard had some dry paste on it. Then I fixed back the setup again.
a b D Laptop
October 18, 2014 7:58:11 AM

Did you reapply new thermal compound? Might be too much or too little
October 17, 2014 8:40:10 AM

Firstly I would have just used some canned/compressed air to quickly clean out a laptop fan. Secondly I would recommend that you check how tightly the heatsink is mounted to your GPU as the heatplate might not be making full contact with the package or you accidentally wiped off a lot of thermal paste. Only other think I can think of is that you punctured a heatpipe but if it was just cleaning that seems unlikely.

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