Dell G3 Overheating Repair: New Fans & Thermal Paste
Published by MB&IT in Laptop repair · Tuesday 29 Sep 2026 · 2:15
Tags: laptop, repair, service, dell, g3, repair, laptop, overheating, fix, laptop, fan, replacement
Tags: laptop, repair, service, dell, g3, repair, laptop, overheating, fix, laptop, fan, replacement
Dell G3 Overheating Fix: New Fans, Fresh Thermal Paste, and a Smart BIOS Tweak
A gaming laptop that overheats and rattles isn't just annoying to listen to — left unchecked, it can shorten the life of internal components. This Dell G3 repair covers off a few different fixes that, together, made a big difference.
The Problem: Overheating and Loud, Rattling Fans
This Dell G3 came in with the CPU overheating and fans rattling loudly under load — a common combination on gaming laptops after dust and old thermal paste build up over time, and in some cases a sign the fans themselves are wearing out.
The Fix: Cleaning, New Thermal Paste, and New Fans
We carried out a proper internal clean, replaced the thermal paste, and fitted new fans — resolving both the overheating and the rattling noise in one pass, since a worn or dusty fan is often the root cause of both symptoms together.
A Smart Extra Step: Disabling Turbo Boost
Since this particular laptop wasn't being used for gaming, we also switched off Turbo Boost in the BIOS. Turbo Boost pushes the CPU to run faster (and hotter) under load — genuinely useful for gaming, but unnecessary if the laptop is mainly used for everyday tasks. Disabling it keeps temperatures lower day-to-day without any real downside for non-gaming use, and it's a good example of tailoring a repair to how the customer actually uses their machine, not just fixing the symptom.
Malware Removal and a Speed-Up
While working on the laptop, we also removed malware that had been slowing the system down and cleaned up the operating system, leaving it running noticeably faster on top of the temperature fix.
Overheating or Loud Fan Noise on Your Laptop?
Whether it's a gaming laptop like this Dell G3 or an everyday machine, overheating and loud fans are worth fixing early before they cause further damage. MB&IT offers laptop repair, cleaning, and malware removal for customers across Southampton, Sholing, Woolston, Netley, and Chandler's Ford, starting with a £20 diagnostic to identify exactly what's needed.
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