Overheating issues after upgrading Extensa 5236 ZR6 to T9300. Need fix

Hello, this is my first time on forum so i dont know if im right to ask here but, ive upgraded my extensa 5235 zr6 from the T3500 to the T9300 and it worked, but i had a problem, it was getting too hot so that the pc shut down. it boots to the desktop but trying anything on it makes it overheat. i used throttlestop to use it but when playing some games it overheats.i used ptm thermal paste on it and everything was clean, even the fans, but the fans have no back cover, could that be the issue? i want to use the entire cpu not half of it, so please dont tell me to downclock it as it didnt work anyways.

so i want to ask, how can i fix the overheating issues?

Accepted answers

spinN20w1

https://community.acer.com/en/discussion/comment/1351079#Comment_1351079

Ok, so i tried to change the thermal, so i threw the PTM into trash and put some XM-4 thermal paste on it and now it doesn overheat, so its basicly fixed!

All comments

Puraw

Hi spinN20w1,

Nice upgrade on the Extensa 5235 ZR6 — the T9300 is a solid chip for its time. But overheating is a common issue when pushing older systems beyond their original thermal design.

🧊 Here are a few suggestions to help manage temps without downclocking:

🔹 Power Settings:

Switch to the Balanced power plan in Windows
In Settings > System > Power & Battery, choose Best Power Efficiency — this helps reduce CPU spikes during light tasks

🔹 Thermal Management:

PTM paste is great, but without a fan shroud or back cover, airflow may be escaping before it cools the heatsink
Try adding a thin DIY duct or shroud to guide airflow directly through the heatsink fins
Elevate the laptop slightly to improve bottom airflow, or use a cooling pad

🔹 System Load:

Avoid running large games or heavy apps — this laptop wasn’t designed for sustained high loads
Consider increasing RAM if you’re still on 2GB or 3GB — it reduces paging and CPU stress

🛠️ Extra tip: Check if ThrottleStop is set to disable BD PROCHOT — that can help prevent premature thermal throttling, but use it cautiously.

Let me know if you want help checking thermal sensor readings or tweaking ThrottleStop settings for better balance.

billsey

Both CPUs are 35W, so there shouldn't much difference in the heat load on them. Maybe you didn't get the thermal compound spread well when reassembling? Maybe the fan isn't fully plugged in, so not running?

spinN20w1

https://community.acer.com/en/discussion/comment/1351079#Comment_1351079

If the fan wouldnt be fully plugged in then it wouldnt be doing fan noises and would overheat before even windows loads. I used PTM paste, not normal thermal paste that spreads like that gray thing.

spinN20w1

I cant find a thing for the back cover of the fan, a tape could melt.

spinN20w1

https://community.acer.com/en/discussion/comment/1351079#Comment_1351079

Ok, so i tried to change the thermal, so i threw the PTM into trash and put some XM-4 thermal paste on it and now it doesn overheat, so its basicly fixed!

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